Acetylenic chemistry, part 20: Ring opening of 3-azaisatoic anhydride with acetylenic amines: Synthesis of pyrido[2,3-d]pyrimidinones
摘要:
Ring opening of 3-azaisatoic anhydride with acetylenic amine gave the nicotinamides 3a-c. The reaction of triphosgene with the nicotinamides 3a-c yielded the pyrido[2,3-d]pyrimidinones 4a, 5b, 5c, and 7b.
Efficient Synthesis of 2-Methylenethiazolo[2,3-b]quinazolinone Derivatives
摘要:
Substituted o-amino-N-(prop-2-yn-1-yl) aromatic amides easily reacted with carbon disulfide (CS2) in the presence of potassium hydroxide (KOH) in EtOH under reflux conditions. Cyclization reaction followed by a favored 5-exo-dig ring closure afforded 2-methylenethiazolo[ 2,3-b]quinazolinone derivatives in good yields.
Substituted o-amino-N-(prop-2-yn-1-yl) aromatic amides easily reacted with carbon disulfide (CS2) in the presence of potassium hydroxide (KOH) in EtOH under reflux conditions. Cyclization reaction followed by a favored 5-exo-dig ring closure afforded 2-methylenethiazolo[ 2,3-b]quinazolinone derivatives in good yields.
Acetylenic chemistry, part 20: Ring opening of 3-azaisatoic anhydride with acetylenic amines: Synthesis of pyrido[2,3-d]pyrimidinones
作者:Johannes Reisch、Cyril O. Usifoh、James O. Oluwadiya
DOI:10.1007/bf00810472
日期:1992.3
Ring opening of 3-azaisatoic anhydride with acetylenic amine gave the nicotinamides 3a-c. The reaction of triphosgene with the nicotinamides 3a-c yielded the pyrido[2,3-d]pyrimidinones 4a, 5b, 5c, and 7b.