Organolithium-Induced Alkylative Ring Opening of Aziridines: Synthesis of Unsaturated Amino Alcohols and Ethers
作者:David M. Hodgson、Bogdan Štefane、Timothy J. Miles、Jason Witherington
DOI:10.1021/jo0615201
日期:2006.10.1
Organolithium-induced alkylative ring opening of N-sulfonyl-protected aziridinyl ethers is described. The reactions were efficiently carried out with a variety of organolithiums, providing a promising new strategy to unsaturated aminoalcohols and ethers. Cis- and trans-1,4-dimethoxybut-2-ene-derived aziridines were prepared, and their propensity to undergo organolithium- induced alkylative desymmetrization
A chiral three-memberedring Cα,α-disubstituted α-amino acid (R,R)-Ac3cdMOM, in which the α-carbon is not a chiral center, but two side chain β-carbons are chiral centers, was synthesized from dimethyl l-(+)-tartrate, and its homopeptides were prepared. X-ray crystallographic analysis of (R,R)-Ac3cdMOM pentapeptide showed bent left-handed (M) 310-helical structures with an unusual intramolecular hydrogen
手性三元环Cα ,α-二取代的α-氨基酸(R,R)-Ac 3 c dMOM,其中α碳不是手性中心,而两个侧链β碳是手性中心,由1 -(+)-酒石酸二甲酯合成三氯甲烷,并制备其同肽。(R,R)-Ac 3 c dMOM五肽的X射线晶体学分析显示弯曲的左手(M)3 10-具有非常规分子内氢键的N–H···O(醚)型螺旋结构。弯曲螺旋的左手性仅受侧链β-碳手性中心控制。
Hoshino, Jun'ichi; Hiraoka, Junko; Hata, Yasuo, Journal of the Chemical Society. Perkin transactions I, 1995, # 6, p. 693 - 698