Silver catalyzed zinc Barbier reaction of benzylic halides in water
作者:Lothar W. Bieber、Elisabeth C. Storch、Ivani Malvestiti、Margarete F. da Silva
DOI:10.1016/s0040-4039(98)02199-6
日期:1998.12
Benzylic chlorides react in aqueous dibasic potassium phosphate under silver catalysis with aromatic aldehydes in the presence of zinc dust to give 1,2-diaryl alcohols in moderate to good yields. Dimerization to bibenzyls and reduction of the halide are important side reactions. A wide range of substituted aromatic and heteroaromatic aldehydes and of substituted benzylic chlorides can be used. Aliphatic
A practicalmethod to stereospecificallysynthesize trans‐stilbenes was developed via the one‐pot benzylation‐dehydration reaction of aromatic aldehydes with benzyltrimethylsilane (BTMS), which was driven by tetrabutylammonium fluoride (TBAF) in THF. At the same time a plausible description of the whole process was proposed and the effects of substituted groups on the reaction were investigated. Also