1,3-Dipolar cycloadditions of azomethine ylides to alkenylboronic esters. Access to substituted boron analogues of β-proline and 3-hydroxypyrrolidines
摘要:
3-Boronic esters-substituted pyrrolidines were prepared via 1,3-dipolar cycloadditions of azomethine ylides to alkenyl boronates. Hydrolysis gave boron analogues of substituted beta-prolines, while treatment with trimethylamine oxide afforded the corresponding pyrrolidin-3-ols. (C) 2004 Elsevier Ltd. All rights reserved.
Chiral boronates—versatile reagents in asymmetric synthesis
作者:Sabine Thormeier、Bertrand Carboni、Dieter E Kaufmann
DOI:10.1016/s0022-328x(02)01323-2
日期:2002.9
The new, axially chiral borates 2, 9, and 11 and boronates 3–6 and 12 are synthesized in good yields. They are representatives of three different structural types. The bicyclic borates 2 and 9 are homochiral propeller compounds; their exclusive formation is used to increase the enantiomerical purity of 1. Especially the borates are efficient Lewis acidic catalysts for stereoselective Diels–Alder reactions
Rasset C., Vaultier M., Tetrahedron, 50 (1994) N 11, S 3397-3406
作者:Rasset C., Vaultier M.
DOI:——
日期:——
1,3-Dipolar cycloadditions of azomethine ylides to alkenylboronic esters. Access to substituted boron analogues of β-proline and 3-hydroxypyrrolidines
作者:Ali Belfaitah、Muriel Isly、Bertrand Carboni
DOI:10.1016/j.tetlet.2003.12.115
日期:2004.2
3-Boronic esters-substituted pyrrolidines were prepared via 1,3-dipolar cycloadditions of azomethine ylides to alkenyl boronates. Hydrolysis gave boron analogues of substituted beta-prolines, while treatment with trimethylamine oxide afforded the corresponding pyrrolidin-3-ols. (C) 2004 Elsevier Ltd. All rights reserved.
Rasset-Deloge, C.; Martinez-Fresneda, P.; Vaultier, M., Bulletin de la Societe Chimique de France, 1992, vol. 129, p. 285 - 290
作者:Rasset-Deloge, C.、Martinez-Fresneda, P.、Vaultier, M.