Domino [3+3] annulation/ring-cleavage reactions of 1,3- bis(trimethylsilyloxy)-1,3-butadienes with 5-aryl- and 5-vinyl-3-acyl-4,5- dihydrofurans: Efficient synthesis of 5-(4-chlorobut-2-en-1-yl)- and 5-(2-aryl-2-chloroethyl)salicylates

摘要

The domino "[3+3] cyclization-ring-opening" reactions of 1,3-bis(trimethylsilyloxy)-1,3-butadienes with 3-acetyl-5vinyl-4, 5-dihydrofurans afforded 5-(4-halobut-2-en-1-yl)salicylates. The reactions of 1,3-bis(trimethylsilyloxy)-1,3butadienes with 3-acetyl-5-aryl-4,5-dihydrofurans gave 5-(2aryl-2-chloroethyl)salicylates.