作者:Wuensch, Bernhard、Nerdinger, Sven、Hoefner, Georg
DOI:——
日期:——
A Facile and Regioselective Synthesis of Donor-Substituted 2-(2-Halophenyl)acetaldehyde Acetals
作者:Bernhard Wünsch、Sven Nerdinger
DOI:10.1002/ardp.19953280402
日期:——
Starting from vanillin (5a) a facile and high yielding procedure for the preparation of the donor substituted (2‐bromophenyl)‐ and (2‐iodophenyl)acetaldehyde acetals 13c and 16c is described. Homologization of O‐benzylvanillin to obtain the phenylacetaldehyde acetal 15c succeeds by Wittig reaction with the phosphonium chloride 11 and subsequent addition of methanol. 15c is brominated with pyridinium