Synthesis of .beta.-Lactones by the Photochemical Reactions of Chromium Alkoxycarbene Complexes with Aldehydes
摘要:
Photolysis of chromium alkoxycarbene complexes with aldehydes in the presence of Lewis acids produced beta-lactones in low yield. Incorporation of the aldehyde into either side chain of the carbene complex resulted in intramolecular processes which were considerably more efficient.
Synthetic Studies on Aphidicolane and Stemodane Diterpenes. V. A Facile Formal Total Synthesis of (.+-.)-Aphidicolin via a Lewis Acid-Mediated Stereoselective Spiroannelation.