Enantioselective Synthesis of Allenylenol Silyl Ethers via Chiral Lithium Amide Mediated Reduction of Ynenoyl Silanes and Their Diels–Alder Reactions

…, M Kawahata, K Yamaguchi, K Takeda

Index: Kondo, Yasuhiro; Sasaki, Michiko; Kawahata, Masatoshi; Yamaguchi, Kentaro; Takeda, Kei Journal of Organic Chemistry, 2014 , vol. 79, # 8 p. 3601 - 3609

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Citation Number: 3

Abstract

An enantioselective Meerwein-Ponndorf-Verley-type reduction of ynenoylsilanes by a chiral lithium amide followed by a Brook rearrangement and anti-mode protonation across conjugated 1, 3-enynes provides allene derivatives bearing a 2-siloxyvinyl moiety in high enantioselectivity. The E/Z geometry of enol silyl ethers is controlled by the geometry of the starting enyne moiety. Thus,(E)-and (Z)-enol silyl ethers are obtained from (Z)-and (E)- ...