Dipolar Cycloaddition Reactions with Quinazolinones: A New Route for the Synthesis of Several Annelated Pyrrolo- and Pyridazinoquinazoline Derivatives
作者:Sami Ghabrial、Hatem Gaber
DOI:10.3390/80500401
日期:——
6-triones (6a–d), 2-aryl-10-oxopyridazino[6,1-b]-quinazoline-3-thio-carboxamides (10a–d) and 2-aryl-3-nitro-1,2,3,4-tetrahydro-pyridazino[6,1-b]quinazolin-10-ones (12a–d) were synthesized via a new, facile one step route involving the reactions of the zwitterion 4, formed in situ, with a variety of N-arylmaleimides 5, 3-aryl-2-cyano-thioacrylamides 8 and ω-nitrostyrenes 11. Dehydrogenation of the tetrahydro
新型 2-芳基-3a,4,12,12a-四氢吡咯[3',4':4,3]-哒嗪并[6,1-b]-quinazoline-1,3,6-triones (6a–d) , 2-aryl-10-oxopyridazino[6,1-b]-quinazoline-3-thio-carboxamides (10a–d) 和 2-aryl-3-nitro-1,2,3,4-tetrahydro-pyridazino[6] ,1-b]quinazolin-10-ones (12a-d) 是通过一种新的、简便的一步法合成的,包括原位形成的两性离子 4 与各种 N-芳基马来酰亚胺 5, 3-芳基- 2-氰基-硫代丙烯酰胺 8 和 ω-硝基苯乙烯 11. 四氢衍生物 6a-d 和 12a-d 在硝基苯中脱氢形成 2-芳基吡咯 [3',4':4,3]-哒嗪基 [6,分别为 1-b]quinazoline-1,3,6-triones