Ethynyloxirane anions: a new tool for natural product synthesis
摘要:
Ethynyl oxiranes can be deprotonated with nBuLi in THF and trapped with various electrophiles, providing a stereoselective access to trisubstituted oxiranes. Alkyl iodides and aldehydes react readily with the ethynyloxiranyl anions but not sulfonyl derivatives. Mechanistic investigations highlighted the stabilizing role of the ethynyl group, the localization of the anion and the coordinating role of the oxirane oxygen atom during deprotonation. (C) 2003 Elsevier Ltd. All rights reserved.
Chuche, Josselin; Grandjean, Didier; Pale , Patrick, Bulletin des Societes Chimiques Belges, 1992, vol. 101, # 5, p. 415 - 432
作者:Chuche, Josselin、Grandjean, Didier、Pale , Patrick
DOI:——
日期:——
A general access to optically pure epoxypolyynes: asymmetric synthesis of antifeedant natural products
作者:D. Grandjean、P. Pale、J. Chuche
DOI:10.1016/s0040-4020(01)82372-3
日期:1993.6
A general asymmetric approach toward cis-epoxypolyynes is described using optically pure (2R, 3S)-5-bromo-2,3-epoxy-4-pentyn-1-ol 1a as the key intermediate. From this intermediate, the synthesis of 2 epoxy polyyne natural products was carried out in 6 steps with a 42% overall yield.
Ethynyloxirane anions: a new tool for natural product synthesis
作者:Sophie Klein、Jing H Zhang、Michel Holler、Jean-Marc Weibel、Patrick Pale
DOI:10.1016/j.tet.2003.10.012
日期:2003.12
Ethynyl oxiranes can be deprotonated with nBuLi in THF and trapped with various electrophiles, providing a stereoselective access to trisubstituted oxiranes. Alkyl iodides and aldehydes react readily with the ethynyloxiranyl anions but not sulfonyl derivatives. Mechanistic investigations highlighted the stabilizing role of the ethynyl group, the localization of the anion and the coordinating role of the oxirane oxygen atom during deprotonation. (C) 2003 Elsevier Ltd. All rights reserved.