Synthesis of Optically Enriched β-Trifloromethyl- δ-lactones through Asymmetric Aldol Reactions of Acetaldehyde with Unsaturated Trifluoromethyl Ketones as the Key Steps
Yao Zili, Kang Tairan, He Long, Liu Quanzhong
Chin. J. Org. Chem. . 2014, (7): 1399 -1406 .  DOI: 10.6023/cjoc201402028