Microbiological oxidation of long-chain aliphatic compounds. Part V. Mechanism of hydroxylation
作者:D. F. Jones
DOI:10.1039/j39680002827
日期:——
[(17D)-17-3H1]stearate, and methyl [(17DL)-17-3H1]stearate have been prepared. Each of these compounds, mixed with methyl [U-14C]stearate, has been incubated with Torulopsis gropengiesseri, to give, after work-up, methyl 17-L-hydroxystearate and dimethyl octadecane-1,18-dioate. Determination of the 3H : 14C ratios of the latter compounds has established (a) that ω-hydroxylation and ω-1-hydroxylation of stearic acid
甲基[(17大号)-17- 3 ħ 1 ]硬脂酸酯,甲基[(17 d)-17- 3 ħ 1 ]硬脂酸酯,以及甲基[(17 DL)-17- 3 ħ 1 ]硬脂酸已经制备。这些化合物中的每一种都与[U- 14 C]硬脂酸甲酯混合,已与Torulopsis gropengiesseri孵育,在后处理后得到17- L-羟基硬脂酸甲酯和十八烷基二甲基-1,18-二酸酯。3 H:14的测定后一种化合物的C比值已确定(a)硬脂酸的ω-羟基化和ω-1-羟基化是独立的反应,涉及氢原子总体上被羟基直接取代,(b)ω-硬脂酸的1-羟基化是立体有择方法,该方法发生与配置的保持力,以及(c)一个动力学同位素效应[(17的羟基化过程中可能操作大号)-17- 3 ħ 1 ]硬脂酸。1-溴的混合物[(16 DL)-16- 3 ħ 1 ]十七烷和1-溴[U- 14 C]十七烷被氧化以T. gropengiesseri后处理后得到1