1-Phenylisobenzofuran, 1-phenylnaphtho[2,3-c]furan, 1-phenylnaphtho[1,2-c]furan, and 3-phenylnaphtho[1,2-c]furan via cyclic hemiaminal, hemiacetal, and acetal precursors
Herein we report a highly enantioselective kineticresolution of tertiary benzyl alcohols via palladium/chiral norbornene cooperative catalysis. With simple aryl iodides as the resolutionreagent, a wide range of readily available racemic tertiary benzyl alcohols are applicable to this method. Both chiral tertiary benzyl alcohols and benzo[c]chromene products are obtained in good to excellent enantioselectivities
It has been established that a cationic gold(I)/(R)‐H8‐binapcomplex catalyzes the enantioselective [4+2] annulation of benzene‐linked ene‐yne‐carbonyls to give chiral tricyclic compounds with moderate ee values. Interestingly, the reactions of naphthalene‐linked ene‐yne‐carbonyls with the same gold(I) catalyst gave not only [4+2] annulation products but also [3+2] annulation products as minor products