作者:Makhan L. Purkayastha、Malapaka Chandrasekharam、Jai N. Vishwakarma、Hiriyakkanavar Ila、Hiriyakkanavar Junjappa
DOI:10.1055/s-1993-25841
日期:——
The synthesis of acylketene O,S-dialkyl acetals 2a-p and acylketene O-aryl S-alkyl acetals 6a-i is described. The compounds 2a-n are obtained by base-catalyzed alkylation of the respective β-oxo thiono esters 4a-n prepared by alkoxythiocarbonylation of active methylene ketones in the presence of sodium tert-butoxide. The corresponding O-dodecanyl 2o, O-benzyl 2p and O-aryl, S-methyl 6a-i acetals are synthesized via base-catalyzed displacement of the sulfonium salts 5a-b with the corresponding alkanol or phenol.
描述了酰基烯酮O,S-二烷基缩醛2a-p和酰基烯酮O-芳基S-烷基缩醛6a-i的合成。化合物 2a-n 是通过在叔丁醇钠存在下通过活性亚甲基酮的烷氧基硫代羰基化制备的相应β-氧代硫代酯 4a-n 的碱催化烷基化获得的。相应的O-十二烷基2o、O-苄基2p和O-芳基、S-甲基6a-i缩醛通过用相应的链烷醇或苯酚碱催化置换锍盐5a-b来合成。