Synthetic Studies on Spiroketal Natural Products. IV. A Stereoselective Synthesis of (3S,5S,6R,9R,Rs)-3-Benzyloxymethyl-9-hydroxymethyl-5-(p-tolyl)sulfinyl-1,7-dioxaspiro(5.5)undecane, a Key Intermediate for Talaromycins.
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