Brønsted Acid Catalyzed Asymmetric Aldol Reaction: A Complementary Approach to Enamine Catalysis
作者:Guillaume Pousse、Fabien Le Cavelier、Luke Humphreys、Jacques Rouden、Jérôme Blanchet
DOI:10.1021/ol101176j
日期:2010.8.20
A syn-enantioselective aldolreaction has been developed using Brønstedacidcatalysis based on H8-BINOL-derived phosphoric acids. This method affords an efficient synthesis of various β-hydroxy ketones, some of which could not be synthesized using enamine organocatalysis.
Synthetic utility of bowl-shaped tris(2,6-diphenyl-benzyl)silyl glyoxylate as a stable glyoxylate: application to highly diastereoselective aldol reactions
作者:Seiji Shirakawa、Keiji Maruoka
DOI:10.1016/s0040-4039(02)02557-1
日期:2003.1
A stable glyoxylate can be successfully applied to both syn- and anti-selective aldol reactions by using two different kinds of ordinary Lewis acids. Thus, treatment of bowl-shaped tris(2,6-diphenylbenzyl)silyl glyoxylate 1 with enol silyl ether under the influence of BF3.OEt2 gave syn-aldol product, while the use of TiCl4 afforded anti-aldol product with >97% selectivity. (C) 2002 Elsevier Science Ltd. All rights reserved.
Arbuzov,Yu.A.; Klimova,E.I., Journal of general chemistry of the USSR, 1962, vol. 32, # 11, p. 3606 - 3609
作者:Arbuzov,Yu.A.、Klimova,E.I.
DOI:——
日期:——
Enesulfonamides as Nucleophiles in Catalytic Asymmetric Reactions