作者:Anubhav P.S. Narula、Joseph W. Epstein
DOI:10.1016/s0040-4020(01)91545-5
日期:1983.1
prepared by an efficient sequence involving the synthesis of ethyl 2-(3-pyridyl)-acrylate, 3 from ethyl 2-(3-pyridyl)acetate, 1, followed by Michael-addition of HCN (via acetone cyanohydrin-MeOH) to give cyanoester 4. Alternatively, 4 was prepared from the methyl ester 8 by alkylation with iodoacetonitrile. Acid hydrolysis gave amide-ester 5 which was then cyclized with NaOEt to 2-(3-pyridyl)succimide, 6.
通过涉及由2-(3-吡啶基)乙酸乙酯-1合成2-(3-吡啶基)丙烯酸乙酯3的有效序列来制备新化合物2-(3-吡啶基)马来酰亚胺7,然后通过用HCN的迈克尔加成法(通过丙酮氰醇-MeOH),得到氰基酯4。或者,通过用碘乙腈烷基化由甲酯8制备4。酸水解得到酰胺酯5,然后将其用NaOEt环化成2-(3-吡啶基)琥珀酰亚胺6。6,用N-氯琥珀酰亚胺在吡啶中将6-氧化为马来酰亚胺7,总产率为58%。