Magull, Jörg

[["dc.bibliographiccitation.firstpage","6953"],["dc.bibliographiccitation.issue","35"],["dc.bibliographiccitation.journal","European Journal of Organic Chemistry"],["dc.bibliographiccitation.lastpage","6958"],["dc.contributor.author","de Meijere, Armin"],["dc.contributor.author","Redlich, Stefan"],["dc.contributor.author","Kozhushkov, Sergei I."],["dc.contributor.author","Yufit, Dmitry S."],["dc.contributor.author","Magull, Joerg"],["dc.contributor.author","Vidovic, Denis"],["dc.contributor.author","Schill, Heiko"],["dc.contributor.author","Menzel, Henning"],["dc.date.accessioned","2018-11-07T09:02:47Z"],["dc.date.available","2018-11-07T09:02:47Z"],["dc.date.issued","2012"],["dc.description.abstract","(E,E)-1,2,3,4-Tetracyclopropylbuta-1,3-diene (3) and (Z,Z)-1,4-diodo-1,2,3,4-tetracyclopropylbuta-1,3-diene (4) were prepared from dicyclopropylacetylene via an intermediate 2,3,4,5-tetracyclopropyltitanacyclopentadiene (2) in 91 and 77% yield, respectively. In the crystal, 3 adopts a conformation with an almost coplanar (phi = 163 degrees) 1,3-diene core, with the inner vinylcyclopropane units in an orthogonal and the outer vinylcyclopropane moieties in an s-trans orientation. This diene, like 2,3-cyclopropylbuta-1,3-diene (5), undergoes facile concerted [4+2] cycloadditions at 130 degrees C with dimethyl acetylenedicarboxylate as well as N-phenylmaleimide and at 0 degrees C with N-phenyltriazolinedione. An X-ray crystal structure analysis of 2,3-dicyclopropylbuta-1,3-diene (5) also reveals a coplanar inner core with the vinylcyclopropane units in essentially orthogonal (phi(av)=89.3 degrees) orientation. Differential scanning calorimetry (DSC) measurements indicate that 3 undergoes significant internal reorganization on going from the liquid to the crystalline phase, and a gauche conformer of 3 may well be favored over the s-trans conformer in the liquid."],["dc.identifier.doi","10.1002/ejoc.201201054"],["dc.identifier.isi","000312035900015"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/24762"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-v C H Verlag Gmbh"],["dc.relation.issn","1434-193X"],["dc.title","(E,E)-1,2,3,4-Tetracyclopropylbuta-1,3-diene: Synthesis and Some of Its Properties"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","35"],["dc.bibliographiccitation.journal","ChemInform"],["dc.bibliographiccitation.volume","38"],["dc.contributor.author","Suennemann, Hans Wolf"],["dc.contributor.author","Hofmeister, Anja"],["dc.contributor.author","Magull, Joerg"],["dc.contributor.author","de Meijere, Armin"],["dc.date.accessioned","2021-12-08T12:29:35Z"],["dc.date.available","2021-12-08T12:29:35Z"],["dc.date.issued","2007"],["dc.identifier.doi","10.1002/chin.200735180"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/96135"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-476"],["dc.relation.eissn","1522-2667"],["dc.relation.issn","0931-7597"],["dc.rights.uri","http://doi.wiley.com/10.1002/tdm_license_1.1"],["dc.title","Stille—Heck Coupling Sequences Applied in a Versatile New Access to Steroid Skeletons."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","5485"],["dc.bibliographiccitation.issue","24"],["dc.bibliographiccitation.journal","European Journal of Organic Chemistry"],["dc.bibliographiccitation.lastpage","5494"],["dc.contributor.author","Marradi, Marco"],["dc.contributor.author","Brandi, Alberto"],["dc.contributor.author","Magull, Joerg"],["dc.contributor.author","Schill, Heiko"],["dc.contributor.author","de Meijere, Armin"],["dc.date.accessioned","2018-11-07T08:51:08Z"],["dc.date.available","2018-11-07T08:51:08Z"],["dc.date.issued","2006"],["dc.description.abstract","Intramolecular cycloadditions of various nitrone functionalities with different substituents (R = Me, Bn, tBu) at the nitrogen atom tethered to a bicyclopropylidene unit through a two-carbon chain led to cis-fused tricyclic isoxazolidines (3-alkyl-3,3a,4,5,5a,6-hexahydrocyclopropa[2,3]cyclopenta[1,2-c]isoxazolespiro[1,1']cyclopropanes) 26 in 42-58% yield with complete regio- and diastereoselectivity. The thermal rearrangement of the cycloadducts 26 under neutral conditions afforded the corresponding tricyclic tetrahydropyridones 27 (52-53%). The analogous starting materials with a three-carbon tether, the 4-(bicyclopropyliden-2-yl)butylidenenitrones furnished tricyclic isoxazolidines 28 (54-58%) and tetrahydropyridones 29 (55-64%) by subsequent thermal rearrangement. Under acidic conditions (TFA), the cycloadducts 26 and 28 underwent fragmentative rearrangements to afford the tricyclic beta-lactams 30 and 32 (50-66%), respectively, of which the former suffered amide-bond cleavage in situ to provide the corresponding N-trifluoroacetyl beta-amino acid derivatives 31 (68-71%). ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)."],["dc.identifier.doi","10.1002/ejoc.200600417"],["dc.identifier.isi","000243078000009"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/21858"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-v C H Verlag Gmbh"],["dc.relation.issn","1434-193X"],["dc.title","New highly strained multifunctional heterocycles by intramolecular cycloadditions of nitrones to bicyclopropylidene moieties"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1625"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","European Journal of Organic Chemistry"],["dc.bibliographiccitation.lastpage","1636"],["dc.contributor.author","Wu, Y."],["dc.contributor.author","Vidovic, D."],["dc.contributor.author","Magull, Joerg"],["dc.contributor.author","de Meijere, Armin"],["dc.date.accessioned","2018-11-07T11:08:08Z"],["dc.date.available","2018-11-07T11:08:08Z"],["dc.date.issued","2005"],["dc.description.abstract","Twelve differently substituted tricyclic hydroxy ketones 7, 8 with [5-5-x] (x = 5, 6, 7) combinations of ring sizes were prepared in a single step in 43-91% yields (10 examples with 74-91%) from the corresponding protected (2'-oxocycloalkyl)methyl-substituted cyclopentadienes 6, which were obtained by cocyclization of the alkynes 5 with the beta-dimethylamino -substituted alpha,beta-unsaturated Fischer carbene complexes 4 in 38-81% yield (6 examples with 66-81%). In most cases, the cis, anti, cis-isomers anti-7 were the major products. While the twofold cis-fusion is favored by minimal ring strain, hydrogen bonding between the hydroxy and the carbonyl group probably favors the anti-configuration of the tricyclic skeletons. Acid-catalyzed dehydration of the hydroxy ketones anti-7aa, anti-7ba, anti-7ca afforded the corresponding tricyclic dienes 15aa/16aa, 15ba, and 15ca/16ca, respectively. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)."],["dc.identifier.doi","10.1002/ejoc.200400858"],["dc.identifier.isi","000228785100017"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/52715"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-v C H Verlag Gmbh"],["dc.relation.issn","1434-193X"],["dc.title","A new access to multifunctional linear triquinanes and their homologues via alpha,beta-unsaturated Fischer carbene complexes"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","ChemInform"],["dc.bibliographiccitation.volume","38"],["dc.contributor.author","Suennemann, Hans Wolf"],["dc.contributor.author","Hofmeister, Anja"],["dc.contributor.author","Magull, Joerg"],["dc.contributor.author","de Meijere, Armin"],["dc.date.accessioned","2021-12-08T12:29:33Z"],["dc.date.available","2021-12-08T12:29:33Z"],["dc.date.issued","2007"],["dc.identifier.doi","10.1002/chin.200708181"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/96117"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-476"],["dc.relation.eissn","1522-2667"],["dc.relation.issn","0931-7597"],["dc.rights.uri","http://doi.wiley.com/10.1002/tdm_license_1.1"],["dc.title","An Efficient Access to Novel Enantiomerically Pure Steroidal δ-Amino Acids."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","610"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","European Journal of Organic Chemistry"],["dc.bibliographiccitation.lastpage","617"],["dc.contributor.author","Limbach, M."],["dc.contributor.author","Dalai, S."],["dc.contributor.author","Janssen, A."],["dc.contributor.author","Es-Sayed, M."],["dc.contributor.author","Magull, Joerg"],["dc.contributor.author","de Meijere, Armin"],["dc.date.accessioned","2018-11-07T08:31:43Z"],["dc.date.available","2018-11-07T08:31:43Z"],["dc.date.issued","2005"],["dc.description.abstract","Indole readily added across the double bond of the highly reactive Michael acceptor methyl 2-chloro-2-cyclopropylideneacetate (4) to yield 2-chloro-2-(3'-indolylcyclopropyl)acetate 5 (85%) which was converted in two steps into the racemic tryptophan analogue 7 in 90% yield. This in turn was transformed by a condensation and Pictet-Spengler sequence into the spirocyclopropane analogues, 11, 13 and 15, of both the natural product (demethoxy)fumitremorgine C (3b, 3 steps, 11% yield) and the potent PDE-5 inhibitor Tadalafil (2, 3 steps, 71% yield) as well as the original lead structure with a hydantoin backbone (1, 2 steps, 79% yield). ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)."],["dc.identifier.doi","10.1002/ejoc.200400617"],["dc.identifier.isi","000226795300016"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17180"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-v C H Verlag Gmbh"],["dc.relation.issn","1434-193X"],["dc.title","Cyclopropyl building blocks for organic synthesis, Part 107. Addition of indole to methyl 2-chloro-2-cyclopropylideneacetate en route to spirocyclopropanated analogues of demethoxyfumitremorgine C and tadalafil"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","32"],["dc.bibliographiccitation.journal","ChemInform"],["dc.bibliographiccitation.volume","40"],["dc.contributor.author","Noetzel, Marcus W."],["dc.contributor.author","Frank, Daniel"],["dc.contributor.author","Labahn, Thomas"],["dc.contributor.author","Magull, Joerg"],["dc.contributor.author","de Meijere, Armin"],["dc.date.accessioned","2021-12-08T12:29:45Z"],["dc.date.available","2021-12-08T12:29:45Z"],["dc.date.issued","2009"],["dc.identifier.doi","10.1002/chin.200932124"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/96194"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-476"],["dc.relation.eissn","1522-2667"],["dc.relation.issn","0931-7597"],["dc.rights.uri","http://doi.wiley.com/10.1002/tdm_license_1.1"],["dc.title","ChemInform Abstract: Cyclopropyl Building Blocks in Organic Synthesis. Part 151. Diastereoselective Synthesis of Alkylcyclopropane-Anellated Methyl 2-Iminoimidazolinecarboxylates."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","7504"],["dc.bibliographiccitation.issue","20"],["dc.bibliographiccitation.journal","The Journal of Organic Chemistry"],["dc.bibliographiccitation.lastpage","7510"],["dc.bibliographiccitation.volume","72"],["dc.contributor.author","Korotkov, Vadim S."],["dc.contributor.author","Larionov, Oleg V."],["dc.contributor.author","Hoftneister, Anja"],["dc.contributor.author","Magull, Joerg"],["dc.contributor.author","de Meijere, Armin"],["dc.date.accessioned","2018-11-07T10:58:27Z"],["dc.date.available","2018-11-07T10:58:27Z"],["dc.date.issued","2007"],["dc.description.abstract","[GRAPHICS] GaCl3 has been found to efficiently catalyze the formal cycloadditions of diazene derivatives 6 onto 2-arylcyclopropane-1, 1-dicarboxylates 5, giving rise to the pyrazolidine derivatives 7. The insertion into the cyclopropane ring proceeds with complete regioselectivity to furnish 5-arylpyrazolidine-1,2,3,3-tetracarboxylates exclusively; however, the cis-configured azo compound N-phenyltriazolinedione gave the two possible regioisomeric pyrazolidine derivatives in ratios varying from 1:1.5 to 1:3. Conceivable mechanisms of these transformations are being discussed."],["dc.identifier.doi","10.1021/jo0704816"],["dc.identifier.isi","000249698200003"],["dc.identifier.pmid","17824644"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/50484"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Chemical Soc"],["dc.relation.issn","0022-3263"],["dc.title","GaCl3-Catalyzed insertion of diazene derivatives into the cyclopropane ring"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","26"],["dc.bibliographiccitation.journal","ChemInform"],["dc.bibliographiccitation.volume","38"],["dc.contributor.author","Suennemann, Hans Wolf"],["dc.contributor.author","Hofmeister, Anja"],["dc.contributor.author","Magull, Joerg"],["dc.contributor.author","Banwell, Martin G."],["dc.contributor.author","de Meijere, Armin"],["dc.date.accessioned","2021-12-08T12:29:35Z"],["dc.date.available","2021-12-08T12:29:35Z"],["dc.date.issued","2007"],["dc.identifier.doi","10.1002/chin.200726155"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/96129"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-476"],["dc.relation.eissn","1522-2667"],["dc.relation.issn","0931-7597"],["dc.rights.uri","http://doi.wiley.com/10.1002/tdm_license_1.1"],["dc.title","Stille/Diels—Alder Reaction Sequences: Diversity-Oriented Access to Novel Steroids."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1683"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","European Journal of Organic Chemistry"],["dc.bibliographiccitation.lastpage","1686"],["dc.contributor.author","Noetzel, Marcus W."],["dc.contributor.author","Frank, Daniel"],["dc.contributor.author","Labahn, Thomas"],["dc.contributor.author","Magull, Joerg"],["dc.contributor.author","de Meijere, Armin"],["dc.date.accessioned","2018-11-07T08:31:04Z"],["dc.date.available","2018-11-07T08:31:04Z"],["dc.date.issued","2009"],["dc.description.abstract","Cyclopropane- and alkylcyclopropane-annelated methyl imidazolidinecarboxylates 5 are formed from unsubstituted 1-H and from 2'-substituted methyl 2-chloro-2-cyclopropylideneacetates (1-R) and N,N',N ''-triarylguanidines (2) in a domino process consisting of a Michael addition and an immediately ensuing ring closure by intramolecular nucleophilic substitution in moderate to very good yields (30-95%, 8 examples). The products 5 with alkyl substituents on the spirocyclopropane moiety are formed diastereoselectively. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)"],["dc.description.sponsorship","Land Niedersachsen and BayerCrop-Science AG; BASF AG"],["dc.identifier.doi","10.1002/ejoc.200801205"],["dc.identifier.isi","000265169700007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/17033"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-v C H Verlag Gmbh"],["dc.relation.issn","1434-193X"],["dc.title","Diastereoselective Synthesis of Alkylcyclopropane-Annelated Methyl 2-Iminoimidazolidinecarboxylates"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]