Heterocyclizations via POCl3-Based Multicomponent Reactions: A New Approach to One-Pot Synthesis of a New Spirosystem, 7-Methyl-5-[4-(aryl/heteryl)thiazol-2-yl]-5,6-diazaspiro[2,4]hept-6-en-4-ones
摘要:
A novel multicomponent reaction involving phenacylbromide, thiosemicarbazide, and -acetyl--butyrolactone in the presence of POCl3, forming 7-methyl-5-[4-(aryl/heteryl)thiazole-2-yl]-5,8-diaza spiro[2,4]hept-6-en-4-ones in good yields, is described.