Aminothiazole nuclei and their various derivatives have been long used as precursors for
the synthesis of biologically active molecules. As a typical heterocyclic amine, 2 …

Sixteen new 2-benzylidene-7-methyl-3-oxo-5-(substituted phenyl)-2, 3-dihydro-5H-thiazolo
[3, 2-a] pyrimidine-6-carboxylic acid methyl esters (1a–4d) have been synthesized by …

Syntheses and reactions of 2-amino-4-substituted-1, 3-thiazoles are reviewed in a formal
way. The title compounds are most easily accessible by various approaches, and even …

Some new N-(4-chlorophenyl)-6-methyl-4-aryl-2-thioxo-1, 2, 3, 4-tetrahydro pyrimidine-5-
carboxamide 4 (a–h) were synthesized by the reaction of N-(4-chlorophenyl)-3 …

A series of new derivatives of dipyrimido [4, 5-b: 5, 4-e][1, 4] thiazine were synthesized by
treatment of 5-amino-6-methyl-2-morpholino-4-pyrimidinethiol (1) with 5-bromo-2, 4-dichloro …

Amino‐6‐methoxybenzothiazole 1 on reaction with bis (methylthio) methylene malononitrile
2 in the presence of dimethyl formamide and catalytic amount of anhydrous potassium …

Simple and efficient synthesis of a novel fused bicyclic heterocyclic compound 3 by the
reaction of ethyl 2-cyano-3, 3-bis (methylthio) acrylate and thiourea in the presence of …

Cyclocondensation of 5‐amino‐6‐methyl‐2‐morpholinopyrimidine‐4‐thiol (1) and 2‐bromo‐
5, 5‐dimethylcyclohexane‐1, 3‐dione (2) under mild reaction condition afforded 4, 7, 7 …

We report simple and efficient synthesis of novel fused bicyclic heterocyclic compounds 3
using bis (methylthio) methylene malononitrile 1 and thiourea 2 with potassium carbonate in …

Several derivatives of the novel 4-(4-methyl-5 H-pyrimido [4, 5-b][1, 4] thiazin-2-yl)
morpholine and 4-methyl-2-(piperidin-1-yl)-5 H-pyrimido [4, 5-b][1, 4] thiazine ring systems …