The Rh (I)-catalyzed PKR of 1-phenylsulfonyl-1, 2-octadien-7-ynes and their aza derivatives exclusively produced the corresponding 9-phenylsulfonylbicyclo [4.3. 0] nona-1, 6-dien-8- ones and no 4-(phenylsulfonylmethylidene) bicyclo [3.3. 0] oct-1-en-3-ones could be detected. Thus, the ring-closing pattern was found to be the same as those of the previously reported 3-phenylsulfonyl-1, 2-octadien-7-yne derivatives. However, the formation of 4-( ...
