Oxidative cyclization of dialdehydes with alcohols and 1,3-dicarbonyl compounds under Rh(III)/Cu(II) conditions
作者:Takanori Matsuda、Kentaro Suzuki、Shinya Abe、Haruki Kirikae、Noboru Okada
DOI:10.1016/j.tet.2015.10.034
日期:2015.12
For the preparation of 3-alkoxyphthalides from phthalaldehydes and alcohols, a cyclization reaction in the presence of a rhodium(III) catalyst and copper(II) salt is reported. Cyclization of phthalaldehydes also occurs with 1,3-dicarbonyl compounds under similar conditions to produce 3-substituted phthalides in good yields. An acylrhodium(III) species might be a key intermediate in these cyclization
对于从phthalaldehydes和醇3- alkoxyphthalides制备,则报告在铑(III)催化剂和铜的存在下进行环化反应(II)盐。phthalaldehydes的环化也会发生与在类似条件下的1,3-二羰基化合物,以良好的产率生产3-取代的苯酞。酰基铑(III)可能是这些环化反应中的关键中间体。