摘要:
                                Optically active 2-pyridylmethyl p-tolyl (1) and 2-(N-methylimidazolyl) methyl p-tolyl sulfoxides (2) were synthesized and the reactions of their chiral alpha-sulfinyl carbanions with aldehydes afforded stereoselectively the condensation products.  The absolute configurations of the products were determined by x-ray crystallographic analysis and chemical reactions.  The mechanism for the reactions is described.