The stereochemical course of 2-methylisoborneol biosynthesis
作者:Binbin Gu、Anwei Hou、Jeroen S Dickschat
DOI:10.3762/bjoc.18.82
日期:——
Both enantiomers of 2-methyllinalyl diphosphate (2-Me-LPP) were synthesized enantioselectively using Sharpless epoxidation as a key step and purification of enantiomerically enriched intermediates through HPLC separation on a chiral stationary phase. Their enzymatic conversion with 2-methylisoborneol synthase (2MIBS) demonstrates that (R)-2-Me-LPP is the on-pathway intermediate, while a minor formation
使用 Sharpless 环氧化作为关键步骤,并通过手性固定相上的 HPLC 分离纯化对映体富集的中间体,对映体选择性地合成了 2-甲基芳樟基二磷酸 (2-Me-LPP) 的两种对映体。它们与 2-甲基异冰片合酶 (2MIBS) 的酶促转化表明 ( R )-2-Me-LPP 是通路中间体,而从 ( S )-2-Me-LPP形成少量 2-甲基异冰片可以解释异构化为 2-Me-GPP,然后异构化为 ( R )-2-Me-LPP。
Dehydration products of 2-methylisoborneol
作者:R Schumann
DOI:10.1016/s0043-1354(96)00330-2
日期:1997.5
7-Methylenebornane and 2-methyl-2-bornene have previously been identified as dehydration or degradation products of 2-methylisoborneol (MIB), a compound responsible for taste and odour problems in various water environments. Previously, the identification of these products has been based on mass spectral analysis only. The dehydration of MIB under a variety of conditions was reinvestigated and the products fully characterised by H-1 and C-13 n.m.r. and GC-MS. Comparison of EI mass spectra of the dehydration products of MIB with those published previously indicate that earlier assignments of MIB dehydration products are incorrect. (C) 1997 Elsevier Science Ltd.
Sumitomo H., Wat. Sci. Tech., 25 (1992) N 2, S 185-190