Desymmetrization ofN-Sulfonated Aziridines by Alkyllithium Reagents in the Presence of Chiral Ligands
作者:Paul Müller、David Riegert、Gérald Bernardinelli
DOI:10.1002/hlca.200490010
日期:2004.1
epoxides. Similarily, the allylic sulfonamide 10, resulting from rearrangement of 7-[(4-methylphenyl)sulfonyl]-7-azabicyclo[4.1.0]heptane (7) under the same reaction conditions, had the (R)-configuration, while cyclohexen-3-ol, obtained upon rearrangement of cyclohexene oxide, is known to be (S)-configured. Deuterium labelling showed that the rearrangement of 7 proceeds via enantioselective α-elimination
所述的重新排列的立体化学过程Ñ -sulfonylaziridines 5,15,和25中的存在小号正丁基锂/( - ) -鹰爪豆碱的二环磺胺4,16,和17,分别为已被化学和调查了X射线结构分析。在所有情况下,产物的绝对构型与在相应的环氧化物重排时形成的醇的绝对构型相反。类似地,在相同反应条件下,由7-[(4-甲基苯基)磺酰基] -7-氮杂双环[4.1.0]庚烷(7)的重排产生的烯丙基磺酰胺10具有(R)-构型,而通过环己烯氧化物的重排获得的环己烯-3-醇是已知的(S)-构型。氘标记表明的重排7个前进通过对映选择性α在剔除到卡宾,其经历1,2--H转变。