Studies on Ergot Alkaloids and Its Related Compounds. X. Condensation of Cyclic Ketones and 3-Methylaminopropionates
作者:Zen-ichi Horii、Chuzo Iwata、Ichiya Ninomiya、Nobuhiko Imamura、Masayoshi Ito、Yasumitsu Tamura
DOI:10.1248/cpb.12.1405
日期:——
The previous work on the condensation of the several cyclic ketones and the 3-methylaminopropionates [This Bulletin, 10, 940(1962)] was re-investigated. As a result, it was shown that the condensation of cyclohexanone and ethyl 3-methylaminopropionategave 1-methyl-2, 3, 5, 6, 7, 8-hexahydro-4(1H)-quinolone (III) accompanied with a small amount of 1-methyl-3, 4, 5, 6, 7, 8-hexahydro-2(1H)-quinolone(IV), while the same condensation of 2-tetralone and methyl 2-methyl-3-methylaminopropionate gave 2, 4-dimethyl-1, 2, 5, 6-tetrahydrobenzo [f] quinolin-3(4H)-one (VIII) as a major product, and 2, 4-dimethyl-3, 4, 5, 6-tetrahydrobenzo [f] quinolin-1(2H)-one (IX) and 1, 3-dimethyl-1, 2, 5, 10-tetrahydrobenzo [g]-quinolin-4 (3H)-one (X) as minor products. Unequivocal synthetic proofs were given to these reaction products. The results enabled us to develop some discussion on the course of this type of the reaction. Revisions on the structures of the products in the previous paper were also described.
对几种环酮和3-甲基氨丙酸酯的缩合反应的前期研究进行了重新调查[本公告,10,940(1962)]。结果显示,环己酮与乙基3-甲基氨丙酸酯的缩合生成了1-甲基-2, 3, 5, 6, 7, 8-六氢-4(1H)-喹啉(III),伴随着少量的1-甲基-3, 4, 5, 6, 7, 8-六氢-2(1H)-喹啉(IV);而2-四氢苯酮与甲基2-甲基-3-甲基氨丙酸酯的相同缩合反应主要生成了2, 4-二甲基-1, 2, 5, 6-四氢苯并[f]喹啉-3(4H)-酮(VIII),并且生成了2, 4-二甲基-3, 4, 5, 6-四氢苯并[f]喹啉-1(2H)-酮(IX)和1, 3-二甲基-1, 2, 5, 10-四氢苯并[g]-喹啉-4(3H)-酮(X)作为少量产物。对这些反应产物给予了明确的合成证明。研究结果使我们能够就这类反应的过程展开一些讨论。还描述了对前期论文中产品结构的修正。