Ssp. Chou et Cc. Hung, Aza-Diels-Alder reactions and synthetic applications of thio-substituted 1,3-dienes with arylsulfonyl isocyanates, TETRAHEDR L, 41(43), 2000, pp. 8323-8326
The first aza-Diels-Alder reactions of arylsulfonyl isocyanates with thio-s
ubstituted 1,3-dienes via the 3-sulfolene precursors 1 gave the cyclized pr
oducts 3 with complete control of regio- and chemoselectivity. The cyclized
products 3a and 4 underwent further interesting reactions with nucleophile
s and bases to give useful heterocyclic compounds. (C) 2000 Elsevier Scienc
e Ltd. All rights reserved.