A Convenient and Versatile Method for the Preparation of α-Hydroxymethyl Ketone Derivatives from the Corresponding Allyl Silyl Ethers or Allyl Carboxylates
作者:Yung-Son Hon、Ying-Chieh Wong、Kuo-Jui Wu
DOI:10.1002/jccs.200800134
日期:2008.8
The ozonolysis of 1-substituted allyl silyl ethers or 1-substituted allyl carboxylates followed by treatment with bases gave the corresponding α-silyloxymethyl- or a-acyloxymethyl-ketones in good yields. It is proposed to proceed via the corresponding α-silyloxy- or α-acyloxyaldehydes intermediates followed by 1,4-group migration. The results of theoretical calculations are applicable to explain the
Conversion of aldehydes to α-acetoxymethyl ketones: One-carbon homologation with (benzotriazol-1-yl)phenoxymethane
作者:Alan R. Katritzky、Zhijun Yang、Jean-Luc Moutou
DOI:10.1016/0040-4039(94)02395-r
日期:1995.2
Reaction of aldehydes with (benzotriazol-1-yl)phenoxymethyl anion afforded the corresponding addition products which, upon treatment with p-toluenesulfonic acid in acetic acid, yielded the corresponding α-acetoxymethyl ketones.
Aliphatic aldehydes react with catalytic amount of Dibal-H in n-pentane to give the corresponding Tishchenko products in good to excellent yields. On contrary, α-silyloxy aldehydes give α-silyloxy ketones via Oppenauer oxidation under similar condition. Tishchenko reaction of ω-alkene aldehydes followed by RCM and hydrogenation affords a convenient method to prepare the 11–37 membered macrocyclic lactones
Synthetic applications of the amine-base treatment in the ozonolysis of substituted-allyl silyl ethers or -allyl esters via a novel ene–diol type rearrangement
作者:Yung-Son Hon、Ying-Chieh Wong
DOI:10.1016/j.tetlet.2004.12.135
日期:2005.2
The ozonolysis of substituted-allyl silyl ethers or -allyl esters followed by treatment with bases gave the corresponding α-silyloxy ketones or α-acyloxy ketones in good yields. The reaction is proposed to proceed via a novel ene–diol rearrangement of the corresponding α-silyloxy aldehydes or α-acyloxy aldehydes intermediates.
Preparation of .alpha.-acetoxy aldehydes and ketones
申请人:Lilly Industries, Ltd.
公开号:US03965157A1
公开(公告)日:1976-06-22
An improved method for the preparation of intermediates of formula: ##EQU1## WHERE R.sup.1 and R.sup.2 represent hydrogen, C.sub.1.sub.-4 alkyl, C.sub.1.sub.-4 hydroxyalkyl, C.sub.3.sub.-10 cycloalkyl, C.sub.3.sub.-6 acyloxyalkyl, or phenyl, by mercuric ion assisted hydrolysis of the corresponding dithianes, and novel intermediates thereby produced.