• Sirsat Shivraj B
• Jadhav Anilkumar G
• Waghmare Shankar B
• Jadhav Madhav S
• Bobade Dnyaneshwar R

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

Addition elimination reaction, pyrimido oxazine, hydrazine, substituted phenyl hydrazine, substituted benzothia

"SIMPLE AND EFFICIENT SYNTHESIS OF IMINO PYRIMIDO OXAZINE AND THEIR DERIVATIVES.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 3, page no.82-87, March-2020, Available :http://www.jetir.org/papers/JETIRDN06017.pdf

"SIMPLE AND EFFICIENT SYNTHESIS OF IMINO PYRIMIDO OXAZINE 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. pp82-87, March-2020, Available at : http://www.jetir.org/papers/JETIRDN06017.pdf