四氢喹啉,喹啉和二氢喹啉酮是药物分子中常见的核心基序。筛选细胞色素P450酶CYP102A1(P450BM3)的48个变体文库,然后基于初始命中的突变-选择性相关性进行定向诱变,使取代的四氢喹啉,喹啉和3,4-二氢-2-羟基化在两个环的大部分位置上,喹啉酮类以合成相关的比例(1.5 g L -1 天-1)。还观察到其他氧化酶活性,例如C-C键去饱和,芳构化和C-C键形成。这些酶变体在关键的活性位点残基S72,A82,F87,I263,E267,A328和A330处具有突变,为合成和药物发现这些构建基分子的氧官能化衍生物提供了直接且可持续的途径。
四氢喹啉,喹啉和二氢喹啉酮是药物分子中常见的核心基序。筛选细胞色素P450酶CYP102A1(P450BM3)的48个变体文库,然后基于初始命中的突变-选择性相关性进行定向诱变,使取代的四氢喹啉,喹啉和3,4-二氢-2-羟基化在两个环的大部分位置上,喹啉酮类以合成相关的比例(1.5 g L -1 天-1)。还观察到其他氧化酶活性,例如C-C键去饱和,芳构化和C-C键形成。这些酶变体在关键的活性位点残基S72,A82,F87,I263,E267,A328和A330处具有突变,为合成和药物发现这些构建基分子的氧官能化衍生物提供了直接且可持续的途径。
Intramolecular cyclization of alkylhydroxylamines in acids.
作者:MASAMI KAWASE、YASUO KIKUGAWA
DOI:10.1248/cpb.29.1615
日期:——
Alkylhydroxylamines having a benzene ring in the molecule were subjected to intramolecular cyclization in trifluoroacetic acid or in the presence of Lewis acids, and benzenefused six-membered heterocycles were obtained in moderate yields from the cyclization reaction of O-acylhydroxylamines. The effect of a methoxyl group on the benzene ring was also investigated. The m-methoxy compound (1j) cyclized to give 6-methoxy-2-methyl-1, 2, 3, 4-tetrahydroquinoline (2e), while the p-methoxy compound (1k or 1l) cyclized to give the same product (2e). These unusual results could be explained in terms of a spiro-intermediate (3a).
Transformation of Oximes of Phenethyl Ketone Derivatives to Quinolines and Azaspirotrienones Catalyzed by Tetrabutylammonium Perrhenate and Trifluoromethanesulfonic Acid
quinolines by the treatment with tetrabutylammonium perrhenate, trifluoromethanesulfonicacid, and chloranil in refluxing 1,2-dichloroethane. Azaspirotrienones can be synthesized from p-hydroxyphenethyl or 3-(p-hydroxyphenyl)propyl ketone oximes by applying the above method. Thus prepared azaspirotrienones are converted to quinolines by acid treatment.