Gould-Jacob Type of Reaction in the Synthesis of Thieno[3,2-e]pyrimido[1,2-c]pyrimidines: A Comparison of Classical Heating vs Solvent-Free Microwave Irradiation

EMCA and DEEM as Michael Reagents Used in Organic Synthesis

“…Dave et al obtained also thiopheno[3,2-e]pyrimido[1,2-c]pyrimidines (50)(Fig. 47)[181] and pyrido[3,2-e]pyrimidino[1,2-c]pyrimidines(51) …”

Synthesis and Interconversion of Isomeric Pyrrolotriazolopyrimidines.

“…28 Yield, 85%, mp 181-183 • C; IR (KBr): ν = 2210 (CN), 1620, 1508 cm −1 (C C, C N ring); 1 H NMR (CDCl 3 ): δ = 1.…”

“…So far, there has not been any report on isomeric conversion in the pyrrolotriazolopyrimidine system. Therefore, in continuation of our interest in fused triheterocyclic pyrimidines [26][27][28][29], it was interesting to report the synthesis of 7H-pyrrolo [3,2- Therefore, in continuation of our interest in fused triheterocyclic pyrimidines [26][27][28][29], it was interesting to report the synthesis of 7H-pyrrolo [3,2- …”

Heterocyclic Chemistry Using Microwave‐Assisted Approaches

“…73 . A one-pot synthesis of pyrano [2,3-d]pyrimidines was also described by Kidwai and co-workers starting from thiobarbituric acids.…”