Cycloaddition of Aroyl Isothiocyanate: A Novel Synthesis of Triazine, Oxazine, Pyrimidine, and Pyridine Derivatives
作者:Mohamed G. Assy、Hassan A. El‐Sayed、Nabil H. Ouf、Ahmed Hamza、Hesham A. Morsy
DOI:10.1002/jhet.3690
日期:2019.10
with urea or malononitrile gave s‐triazine 4 and 1,3‐oxazine 7 derivatives, respectively. The reaction of heteroallene 1 with acetylacetone tolerated 2‐thioxopyridine derivative 9. The latter compound underwent heterocyclization with urea, hydrazine hydrate, or phenyl hydrazine to give the annulated pyridines 10–12. Pyrimidinethione 14 was resulted from reaction of acylisothiocyanate with enamine 13