RECENT DEVELOPMENTS IN THE CHEMISTRY OF alpha -ALKOXY AND alpha -AMINOSUBSTITUTED ORGANOTINS DIRECTED TOWARDS ORGANIC SYNTHESIS.

alpha -Heterosubstituted organotins are potentially interesting synthetic tools. New efficient and versatile routes to these reagents are presented. The syntheses involve the stannylation of organic substrates (orthoformates, aldehydes, aminoacetals or immonium salts) as well as the modification of doubly functionalized organotin compounds (e. g. diethoxymethyltributyltin or alpha -chloro- alpha -ethoxymethyltributyltin) with organoaluminum reagents or Grignard reagents. The new organotins are shown to be efficient tools for organic synthesis after transmetallation with butyllithium or after direct (or catalyzed) reactions with various organic substrates.