tertiary benzylic positions of methylbenzylethers or unsymmetrical dibenzyl ethers and is also applicable to direct allylation, alkynylation, and cyanation reactions, as well as the azidation. The present methodologies provide not only a novel chemoselectivity but also the advantage of shortened synthetic steps, due to the direct process without the deprotection of the methyl and benzylethers.
Selective Monoalkylation of Acyclic Diols by Means of Dibutyltin Oxide and Fluoride Salts.
作者:Nobuo NAGASHIMA、Masaji OHNO
DOI:10.1248/cpb.39.1972
日期:——
Fluoride anion was found to promote monoalkylation reaction of diols by the stannylene acetal method, and selective monoalkylation of various acyclic diols was accomplished in good yields under mild conditions by employing this new method. Functional groups such as carboxylic acid ester, carboxamide, carbamate, nitrile, alkyl chloride, and ether were not affected under the reaction conditions.