Rhodium(II)-Catalyzed Stereocontrolled Synthesis of Dihydrofuran-3-imines from 1-Tosyl-1,2,3-triazoles
摘要:
Rhodium(II) acetate catalyzes the denitrogenative transformation of 5-substituted and 4,5-disubstituted 1-sulfonyl-1,2,3-triazoles with pendent allyl and propargyl ether motifs to oxonium ylides that undergo [2,3]-sigmatropic rearrangement to give substituted dihydrofuran-3-imines in high yield and diastereoselectivity.
Diastereoselective synthesis of 2,5-dialkyl tetrahydrofuran-3-ones by a copper-catalysed tandem carbenoid insertion and ylide rearrangement reaction
作者:J.Stephen Clark
DOI:10.1016/s0040-4039(00)60041-2
日期:1992.10
Cu(acac)2-Catalysed cyclisations of the alpha-diazo ketones 3, result in the diastereoselective formation (>97:3) of the trans-2,5-dialkyl tetrahydrofuran-3-ones 4. The yields and levels of diastereoselection are catalyst, solvent, and temperature dependent.
Rhodium(II)-Catalyzed Stereocontrolled Synthesis of Dihydrofuran-3-imines from 1-Tosyl-1,2,3-triazoles
作者:Alistair Boyer
DOI:10.1021/ol500309x
日期:2014.3.21
Rhodium(II) acetate catalyzes the denitrogenative transformation of 5-substituted and 4,5-disubstituted 1-sulfonyl-1,2,3-triazoles with pendent allyl and propargyl ether motifs to oxonium ylides that undergo [2,3]-sigmatropic rearrangement to give substituted dihydrofuran-3-imines in high yield and diastereoselectivity.