• Sirsat Shivraj B
• Jadhav Anilkumar G
• Khansole Sandeep V
• Ade Suraj B
• Bobade Dnyaneshwar R

In this review we report simple and efficient synthesis of novel fused tricyclic heterocyclic compounds by heating 6-imino-2-(4-methoxyphenyl)-8-(methylthio)-4-phenyl-9,9a-dihydro-2H,6H-pyrimido[2,1-b][1,3]thiazine-7-carbonitrile with hydrazine, substituted phenyl hydrazine and substituted benzothiazole using potassium carbonate in DMF as solvent under reflux condition to give 4-imino-8-(4-methoxyphenyl)-2-substituted-6-phenyl-2,4,9a,10-tetrahydro-8H-pyrazolo[3',4':4,5]pyrimido[2,1-b][1,3]thiazin-3-amine.

Addition-elimination reaction, pyrimido thiazine, hydrazine, substituted phenyl hydrazine, substituted benzothiazole

"SIMPLE AND EFFICIENT SYNTHESIS OF IMINO PYRIMIDO THIAZINE AND THEIR DERIVATIVES.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 3, page no.88-93, March-2020, Available :http://www.jetir.org/papers/JETIRDN06018.pdf

"SIMPLE AND EFFICIENT SYNTHESIS OF IMINO PYRIMIDO THIAZINE AND THEIR DERIVATIVES.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 3, page no. pp88-93, March-2020, Available at : http://www.jetir.org/papers/JETIRDN06018.pdf