Studies in Pyrimidine-Annelated Heterocycles1 by Tandem Cyclization: Regioselective Synthesis of [6,6]Pyranopyran by Intramolecular [1,6] Michael Addition
Regioselective Synthesis of 6H-Pyrano[3,2-e]Pyrimidine-2,4-Dione
摘要:
7-Aryloxymethyl-1,3-dimethyl-6H-pyrano[3,2-e]pyrimidine-2,4-diones(4a-f) were synthesized in 88-92% yields (isolated) by the regioselectively thermal [3s, 3s] sigmatropic rearrangement of 1,3-dimethyl-5-(1 -aryloxybut-2-ynyloxy)pyrimidine-2,4-diones, (3a-f) in refluxing chlorobenzene (purified) for 2-4 h.
Regioselective Synthesis of 6H-Pyrano[3,2-e]Pyrimidine-2,4-Dione
作者:Majumdar、Das
DOI:10.1080/00397919708005924
日期:1997.11
7-Aryloxymethyl-1,3-dimethyl-6H-pyrano[3,2-e]pyrimidine-2,4-diones(4a-f) were synthesized in 88-92% yields (isolated) by the regioselectively thermal [3s, 3s] sigmatropic rearrangement of 1,3-dimethyl-5-(1 -aryloxybut-2-ynyloxy)pyrimidine-2,4-diones, (3a-f) in refluxing chlorobenzene (purified) for 2-4 h.
Studies in Pyrimidine-Annelated Heterocycles<sup>1</sup> by Tandem Cyclization: Regioselective Synthesis of [6,6]Pyranopyran by Intramolecular [1,6] Michael Addition