Psychotropic agents. IV. Syntheses of .BETA.-phenyl-.GAMMA.-butyrolactone derivatives.
作者:MAKOTO SATO、AKIRA KOSASAYAMA、FUMIHIKO UCHIMARU
DOI:10.1248/cpb.29.2885
日期:——
β-Phenyl-γ-butyrolactones (IIIa-j) bearing several substituents on the phenyl ring were synthesized. Deamination of 4-amino-3-(2, 4, 6-trimethylphenyl) butyric acid (IV) with nitrous acid gave rearranged compounds, β-(2, 4, 6-trimethylbenzyl)-β-propiolactone (V) and 3-hydroxy-4-(2, 4, 6-trimethylphenyl) butyric acid (VI) together with the required β-(2, 4, 6-trimethylphenyl)-γ-butyrolactone (IIIj). Reaction of 2-phenyloxirane derivatives (IXh-j) with sodium diethylmalonate was found to be a convenient method for the preparation of β-phenyl-γ-butyrolactones (IIIh-j) substituted with electron-donating group on the phenyl ring.
合成了苯环上带有多个取代基的β-苯基-γ-丁内酯(IIIa-j)。用亚硝酸将 4-氨基-3-(2,4,6-三甲基苯基)丁酸 (IV) 脱氨基,得到重排化合物 β-(2,4,6-三甲基苄基)-β-丙内酯 (V) 和 3-羟基-4-(2,4,6-三甲基苯基)丁酸(VI)以及所需的β-(2,4,6-三甲基苯基)-γ-丁内酯(IIIj)。发现2-苯基环氧乙烷衍生物(IXh-j)与丙二酸二乙酯钠的反应是制备苯环上被给电子基团取代的β-苯基-γ-丁内酯(IIIh-j)的简便方法。