Toluene dioxygenase-catalysed oxidation route to angular cis-monohydrodiols and other bioproducts from bacterial metabolism of 1,2-dihydrobenzocyclobutene and derivatives
作者:Derek R. Boyd、Narain D. Sharma、Timothy A. Evans、Melanie Groocock、John F. Malone、Paul J. Stevenson、Howard Dalton
DOI:10.1039/a608071e
日期:——
A mutant strain (UV4) of the soil bacterium Pseudomonas
putida, containing toluene dioxygenase, has been used in the
metabolic oxidation of 1,2-dihydrobenzocyclobutene
12
and the related substrates 1,2-dihydrobenzocyclobuten-1-ol 13 and
biphenylene 33. Stable angular cis-monohydrodiol metabolites
(1R,2S)-bicyclo[4.2.0]octa-3,5-diene-1,2-diol 7,
(1S,2S,8S)-bicyclo[4.2.0]octa-3,5-diene-
1,2,8-triol 8 and biphenylene-cis-1,8b-diol 9, isolated from
each of these substrates, have been structurally and stereochemically
assigned. The structure, enantiopurity and absolute configuration of the
other cis-diol metabolites,
(2R,3S)-bicyclo[4.2.0]octa-1(6),4-diene-2,3-diol 14
and cis-1,2-dihydroxy-1,2-dihydrobenzocyclobutene 16, and the
benzylic oxidation bioproducts, 1,2-dihydrobenzocyclobuten-1-ol 13,
1,2-dihydrobenzocyclobuten-1-one 15 and
2-hydroxy-1,2-dihydrobenzocyclobuten-1-one 17, obtained from
1,2-dihydrobenzocyclobutene and 1,2-dihydrobenzocyclobuten-1-ol, have
been determined with the aid of chiral stationary-phase HPLC, NMR and CD
spectroscopy, and stereochemical correlation. X-Ray crystallographic
methods have been used in the determination of absolute configuration of
the di-camphanates 27 (from diol 7) and 32 (from diol 9), and the
di-MTPA ester 29 (from diol 14) of the corresponding cis-diol
metabolites. The metabolic sequence involved in the formation of
bioproducts derived from 1,2-dihydrobenzocyclobutene 12 has been
investigated.
土壤细菌恶臭假单胞菌(Pseudomonas putida)的突变株(UV4)含有甲苯双加氧酶,已被用于代谢氧化1,2-二氢苯并环丁烯12以及相关的底物1,2-二氢苯并环丁烯-1-醇13和联苯烯33。从这些底物中分离得到的稳定的角向顺式单羟基二醇代谢物,(1R,2S)-二环[4.2.0]辛-3,5-二烯-1,2-二醇7,(1S,2S,8S)-二环[4.2.0]辛-3,5-二烯-1,2,8-三醇8和联苯烯-顺式-1,8b-二醇9,已经通过结构和立体化学进行了指认。其他顺式二醇代谢物的结构、对映体纯度和绝对构型,(2R,3S)-二环[4.2.0]辛-1(6),4-二烯-2,3-二醇14和顺式-1,2-二羟基-1,2-二氢苯并环丁烯16,以及通过1,2-二氢苯并环丁烯和1,2-二氢苯并环丁烯-1-醇获得的苄基氧化生物产物,1,2-二氢苯并环丁烯-1-醇13、1,2-二氢苯并环丁烯-1-酮15和2-羟基-1,2-二氢苯并环丁烯-1-酮17,已经借助手性固定相HPLC、NMR和CD光谱以及立体化学相关性进行了确定。X射线晶体学方法已被用于确定相应顺式二醇代谢物的二樟脑酸盐27(来自二醇7)、32(来自二醇9)和二MTPA酯29(来自二醇14)的绝对构型。已经研究了1,2-二氢苯并环丁烯12形成衍生生物产物的代谢序列。