Chiral Brønsted Acid‐Catalyzed Enantioselective Friedel–Crafts Reaction of 4,7‐Dihydroindoles with Trifluoromethyl Ketones
Tóm tắt
In the presence of chiral phosphoric acid, an enantioselective Friedel–Crafts reaction of 4,7‐dihydroindoles with aromatic trifluoromethyl ketones and ethyl 4,4,4‐trifluoroacetoacetate has been realized. A series of 2‐substituted 4,7‐dihydroindoles with a trifluoromethylated tertiary alcohol moiety were obtained in 45–95% yields with 60–93%
Từ khóa
Tài liệu tham khảo
2006, Advances in Organic Synthesis: Modern Organofluorine Chemistry – Synthesis Aspects
For selected reviews see:
Zhao Y., 2008, Synlett, 1017
For chiral phosphoric acid‐catalyzed asymmetric reactions see the selected reviews:
Adair G., 2008, Aldrichimica Acta, 41, 31
For selected reviews see:
Wang Y., 2001, Chin. J. Org. Chem., 21, 763