Microbial reduction and resolution of herbicidal 2-alkyl-2-aryloxyacetic acids by Gloeosporium olivarum.
作者:YOSHIKO TSUDA、KENICHI KAWAI、SHOICHI NAKAJIMA
DOI:10.1248/cpb.33.1955
日期:——
When a mold, Gloeosporium olivarum, was fermented with (±)-2-alkyl-2-aryloxyacetic acids (1-8), an enantioselective microbial reduction as well as microbial resolution took place, giving rise to (S)-2-alkyl-2-aryloxyethanols (1a-8a) and (R)-2-alkyl-2-aryloxyacetic acids (1b-8b). The configurations of the chiral 2-alkyl-2-aryloxyethanols and 2-alkyl-2-aryloxyacetic acids were consistent with those of the corresponding products formed by Glomerella cingulata, with the sole exception of 8b. The (R)-(+)-α-methoxy-α-trifluoromethylphenylacetic acid (MTPA) esters of the (S)-2-alkyl-2-aryloxyethanols showed larger lanthanide-induced shifts for the methoxy groups (1a, 4a-8a) or an aromatic proton (2a) in the nuclear magnetic resonance (NMR) spectra than the esters of the corresponding (R)-2-alkyl-2-aryloxyethanols. This result can be applied generally for the determination of the absolute configuration of 2-alkyl-2-aryloxyethanols.
当霉菌Gloeosporium olivarum与(±)-2-烷基-2-芳氧乙酸(1-8)发酵时,发生了选择性的微生物还原和微生物分解,产生了(S)-2-烷基-2-芳氧乙醇(1a-8a)和(R)-2-烷基-2-芳氧乙酸(1b-8b)。手性2-烷基-2-芳氧乙醇和2-烷基-2-芳氧乙酸的构型与由Glomerella cingulata生成的相应产物相一致,唯一的例外是8b。 (R)-(+)-α-甲氧基-α-三氟甲基苯乙酸(MTPA)酯与(S)-2-烷基-2-芳氧乙醇在核磁共振(NMR)谱中显示出比相应的(R)-2-烷基-2-芳氧乙醇的酯对甲氧基(1a, 4a-8a)或芳香质子(2a)具有更大的镧系元素诱导位移。这一结果可普遍应用于确定2-烷基-2-芳氧乙醇的绝对构型。