Keteneおよびその誘導体の研究(第56報)Pyrrolidylidene誘導体とDiketeneによる5-Methyl-8-substituted-1,2,3,7-tetrahydroindolizine-7-oneの合成
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2-Pyrrolidylidene-acetone (VIIa) reacted with diketene to give 8-acetyl-5-methyl-1,2,3,7-tetrahydroindolizine-7-one (VIIIa). Similarly, ethyl 2-pyrrolidylidene-acetate (VIIb) and 2-pyrrolidylidene-acetonitrile (VIIc) afforded 8-ethoxycarbonyl-5-methyl-1,2,3,7-tetrahydroindolizine-7-one (VIIIb) and 8-cyano-5-methyl-1,2,3,7-tetrahydroindolizine-7-one (VIIIc), respectively. Reaction of 4-methylamino-3-penten-2-one (IX) with diketene gave 3-acetyl-1,2,6-trimethyl-4-pyridone (X).
- 公益社団法人日本薬学会の論文
- 1973-08-25
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