Studies in pyrimidine-annelated heterocycles by tandem cyclization: Regioselective synthesis of [6,6]pyranopyran by intramolecular [1,6] Michael addition
Kc. Majumdar et U. Das, Studies in pyrimidine-annelated heterocycles by tandem cyclization: Regioselective synthesis of [6,6]pyranopyran by intramolecular [1,6] Michael addition, J ORG CHEM, 63(26), 1998, pp. 9997-10000