Diazo Preparation via Dehydrogenation of Hydrazones with “Activated” DMSO
作者:Muhammad I. Javed、Matthias Brewer
DOI:10.1021/ol070515w
日期:2007.4.1
We report that "activated" dimethyl sulfoxide efficiently dehydrogenates hydrazones to the respective diazo species at -78 degrees C. Under optimized conditions, triethylamine hydrochloride is removed quantitatively by vacuum filtration to provide solutions of diazo compounds. Stable diazo species can be isolated in high yield, or alternatively, the direct treatment of these solutions with carboxylic acids provides esters.
A Highly Efficient and Convenient Method for the Direct Conversion of Alkyl THP Ethers into the Corresponding Alkyl Benzyl Ethers