Asymmetric functionalization at a prochiral carbon center by the aid of sulfinyl chirality: A selective formation of 6-substituted (3,S)- and (3,S)-3-hydroxymethyl-3,4-dihydro-5-(-tolyl)sulfinyl-2-pyrans
Asymmetric functionalization at a prochiral carbon center by the aid of sulfinyl chirality: A selective formation of 6-substituted (3,S)- and (3,S)-3-hydroxymethyl-3,4-dihydro-5-(-tolyl)sulfinyl-2-pyrans