Fitjer, Lutz

[["dc.bibliographiccitation.firstpage","4443"],["dc.bibliographiccitation.issue","24"],["dc.bibliographiccitation.journal","Tetrahedron"],["dc.bibliographiccitation.lastpage","4449"],["dc.bibliographiccitation.volume","59"],["dc.contributor.author","Fitjer, L."],["dc.contributor.author","Gerke, R."],["dc.contributor.author","Weiser, J."],["dc.contributor.author","Bunkoczi, G."],["dc.contributor.author","Debreczeni, J. E."],["dc.date.accessioned","2018-11-07T10:38:18Z"],["dc.date.available","2018-11-07T10:38:18Z"],["dc.date.issued","2003"],["dc.description.abstract","The synthesis of (NI)-trispiro[3.0.0.3.2.2]tridecane [(M)-4], the first hydrocarbon with a helical primary structure of four-membered rings, is described. Key step is the kinetic resolution of a cyclobutanone through reduction with bakers' yeast. As compared to its analogue of three-membered rings, (M)-trispiro[2.0.0.2.1.1]nonane [(M)-1], the specific rotation of (M)-4 is cut in three. According to molecular mechanics calculations this could be due to a potential to adopt different conformations, not given in (M)-1, and to the fact, that (M)-4 describes a distinctly shorter section of a helix than (M)-1. (C) 2003 Elsevier Science Ltd. All rights reserved."],["dc.identifier.doi","10.1016/S0040-4020(03)00617-3"],["dc.identifier.isi","000183358200023"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/45781"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0040-4020"],["dc.title","Helical primary structures of four-membered rings: (M)-trispiro[3.0.0.3.2.2]tridecane"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1205"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","Tetrahedron"],["dc.bibliographiccitation.lastpage","1213"],["dc.bibliographiccitation.volume","60"],["dc.contributor.author","Fitjer, L."],["dc.contributor.author","Kanschik, A."],["dc.contributor.author","Gerke, R."],["dc.date.accessioned","2018-11-07T10:51:41Z"],["dc.date.available","2018-11-07T10:51:41Z"],["dc.date.issued","2004"],["dc.description.abstract","A new approach to helical primary structures of four-membered rings uses a cycloaddition of a trimethylenketeniminium salt to suitable tailored methylenecyclobutanes to assemble the desired carbon framework. The results are short and effective syntheses of (M)-trispiro[3.0.0.3.2.2]tridecane [(M-5], and (P)- and (M)-tetraspiro[3.0.0.0.3.2.2.2]hexadecane [(P)- and (M)-24]. Unlike helices of three-membered rings, the specific rotation decreases, as the length of the helix increases. (C) 2003 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.tet.2003.11.081"],["dc.identifier.isi","000188536800019"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/48950"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0040-4020"],["dc.title","A new approach to helical primary structures of four-membered rings: (P)- and (M)-tetraspiro[3.0.0.0.3.2.2.2]hexadecane"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]