A convenient method for the synthesis of (Z)-α-haloacrylates: Lewis base-catalyzed carbonyl olefination using α-halo-C,O-bis(trimethylsilyl)ketene acetals
synthesis of (Z)-α-haloacrylates from variousaldehydes that uses α-halogenated ethyl-C,O-bis(trimethylsilyl)keteneacetals in the presence of a Lewis base catalyst such as acetate salts was established. This procedure gives the corresponding α-halo-α,β-unsaturated esters in high yields with excellent stereoselectivity from E/Z mixtures of ketene silyl acetals under mild conditions.
Tay, M. K.; About-Jaudet, E.; Collignon, N., Synthetic Communications, 1988, vol. 18, # 12, p. 1349 - 1362
作者:Tay, M. K.、About-Jaudet, E.、Collignon, N.、Teulade, M. P.、Savignac, Ph.
DOI:——
日期:——
anti Ethyl β-thienyl-β-amino-α-hydroxy propionate: a regio and stereoselective ring opening of trans ethyl 2-thienyl-glycidate
作者:A. Solladié-Cavallo、P. Lupattelli、C. Bonini、M. De Bonis
DOI:10.1016/s0040-4039(03)01127-4
日期:2003.6
anti Ethyl beta-thienyl-beta-amino-alpha-hydroxy propionate was obtained regio- and diastereo-selectively in three steps and 45% overall yield, while 95% syn ethyl beta-chloro-beta-thienyl-alpha-hydroxy ester was obtained regio-selectively in two steps and 50% overall yield, both from 2-thienyl aldehyde. (C) 2003 Elsevier Science Ltd. All rights reserved.
TAY, M. K.;ABOUT-JAUDET, E.;COLLIGNON, N.;TEULADE, M. P.;SAVIGNAC, PH., SYNTH. COMMUN., 18,(1988) N 12, C. 1349-1362
作者:TAY, M. K.、ABOUT-JAUDET, E.、COLLIGNON, N.、TEULADE, M. P.、SAVIGNAC, PH.