文摘
Treatment of 3b2;-aryl-3b2;-(benzotriazol-1-yl)-3b1;-primary alkyl (or aryl)-3b1;,3b2;-unsaturated ketones 1 with n-Bu3SnH (4 equiv) in a catalytic amount of AIBN in PhH at reflux afforded 3-alkyl (or aryl)-2-arylindoles 8 in good yields. However, when tert-butyl group is bonded at 3b1;-position, 3-acyl (or aroyl)-2-arylindoles 9 were obtained as major products along with phenanthridines 5 as minor products.