Zn (ODf) 2: preparation and application in asymmetric alkynylation of aldehydes
Z Chen, W Xiong, B Jiang
Index: Chen, Zili; Xiong, Wennan; Jiang, Biao Chemical Communications, 2002 , # 18 p. 2098 - 2099
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Citation Number: 32
Abstract
A new Lewis acid, Zn (ODf) 2, was first prepared from commercially available 3, 3, 4, 4- tetrafluoro [1, 2] oxathietane 2, 2-dioxide in four steps with 56% yields and also was applied to catalyze highly enantioselective alkynylation of aldehydes in the presence of ligand (1S, 2S)-3-(tert-butyldimethylsilyloxyl)-2-N, N-dimethylamino-1-(p-nitrophenyl) propane-1-ol or ligand (−)-N-methylephedrine to afford the corresponding propargylic alcohols in high ...
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