Microbial Oxidation of KE-298 Metabolites by<i>Rhizopus</i>sp. and<i>Rhodococcus</i>sp. Strains
作者:Joji SASAKI、Hideo YOSHIDA、Kazuyuki TOMISAWA、Kimiyo TAKESHITA、Takashi ADACHI
DOI:10.1271/bbb.62.1048
日期:1998.1
The metabolites of the antirheumatic agent KE-298 in humans, (-)-(2R)-M-4 [(-)-(2R)-4-(4-hydroxymethylphenyl)-2-methylthiomethyl-4-oxobutanoic acid], (-)-(2R)-M-5 [diastereomers of (-)-(2R)-4-(4-hydroxymethyl-phenyl)-2-methylsulfinyl-methyl-4-oxobutanoic acid], (-)-(2R)-M-6 [(-)-(2R)-4-(4-carboxyphenyl)-2-methylthio-methyl-4-oxobutanoic acid], and (-)-(2R)-M-7 [di- astereomers of (-)-(2R)-4-(4-carboxyphenyl)-2-methyl-sulfinylmethyl-4-oxobutanoic acid] were synthesized based on microbial transformation. The substrate KE-748 (racemic form of (-)-(2R)- and (+)-(2S)-4-(4-methyl-phenyl)-2-methylthiomethyl-4-oxobutanoic acid: 7.5 g) was converted to (-)-(2R)-M-4 (1.84 g) using Rhizopus sp. TF0040 in a 50-l jar fermentor. Specific cytochrome P-450 inhibitors, SKF-525-A and metyrapone strongly inhibited the hydroxylation reaction. It was suggested that cytochrome P-450 is responsible for the microbial reaction. Furthermore, (-)-(2R)-M-4 (200 mg) was transformed to (-)-(2R)-M-6 (144 mg) by co-oxidation with n-hexadecane as a carbon source using Rhodococcus sp. TA0250 in a 1.4-l jar fermentor. Starting from (-)-(2R)-M-4 and (-)-(2R)-M-6 obtained as above, (-)-(2R)-M-5 and (-)-(2R)-M-7, respectively were chemically synthesized by m-chloroperoxybenzoic acid oxidation.
抗风湿剂KE-298在人体内的代谢物,(-)-(2R)-M-4 [(-)-(2R)-4-(4-羟甲基苯基)-2-甲硫基甲基-4-氧代丁酸], (-)-(2R)-M-5 [(-)-(2R)-4-(4-羟甲基-苯基)-2-甲基亚磺酰基-甲基-4-氧代丁酸的非对映异构体], (-)-(2R )-M-6 [(-)-(2R)-4-(4-羧基苯基)-2-甲硫基-甲基-4-氧代丁酸]和 (-)-(2R)-M-7 [非对映异构体基于微生物转化合成了(-)-(2R)-4-(4-羧基苯基)-2-甲基-亚磺酰基甲基-4-氧代丁酸]。底物KE-748((-)-(2R)-和(+)-(2S)-4-(4-甲基-苯基)-2-甲硫基甲基-4-氧代丁酸的外消旋形式:7.5克)被转化使用根霉属 (Rhizopus sp.) 合成 (-)-(2R)-M-4 (1.84 g)。 TF0040 在 50 升发酵罐中。特异性细胞色素 P-450 抑制剂 SKF-525-A 和甲吡酮强烈抑制羟基化反应。有人认为细胞色素 P-450 负责微生物反应。此外,使用红球菌属菌种,通过与正十六烷作为碳源共氧化,将(-)-(2R)-M-4 (200 mg)转化为(-)-(2R)-M-6 (144 mg)。 。 TA0250 在 1.4 升发酵罐中。从如上获得的(-)-(2R)-M-4和(-)-(2R)-M-6开始,(-)-(2R)-M-5和(-)-(2R)-M -7分别由间氯过苯甲酸氧化化学合成。