InCl3-Catalyzed Allylic Friedel−Crafts Reactions toward the Stereocontrolled Synthesis of 1,2,3,4-Tetrahydroquinolines
摘要:
Allyl chlorides tethered to an N-aryl moiety readily undergo InCl3-catalyzed Friedel Crafts reactions to furnish highly enantiomerically enriched 1,2,3,4-tetrahydroquinolines with good yields and excellent diastereoselectivity.
The first catalytic, enantioselectivevinylogousMannichreaction of acyclic silyl dienolates is reported. A second‐generation 2,2′‐dihydroxy‐1,1′‐binaphthyl (BINOL)‐based phosphoric acid has been developed and further optimized as an enantioselective organocatalyst. Upon protonation of the imines, chiral contact ion pairs are generated in situ and attacked highly diastereoselectively by the nucleophile