A rapid entry into the 2H-quinolizin-2-one starting from 2-alkyl pyridine has been developed. Initial deprotonation of a 2-alkyl pyridine followed by acylation with a β-TMS-propyonate derivative provides acyclic precursors that after deprotection undergoes a 6-endo-trig cyclization to yield the desired 2H-quinolizin-2-one derivative. This synthetic strategy was found to be generally applicable as evidenced
已经开发了从2-烷基
吡啶开始快速进入2 H-
喹啉嗪-2-酮。2-烷基
吡啶的初始去质子化,然后与β-TMS-
丙酸酯衍
生物进行酰化,提供了无环前体,其在脱保护后经历了6-内-trig环化,从而生成了所需的2 H-
喹啉嗪-2-一衍
生物。从这封信中的各种例子可以看出,这种综合策略普遍适用。