作者:Hannes Leisch、Alvaro T. Omori、Kevin J. Finn、Jacqueline Gilmet、Tyler Bissett、David Ilceski、Tomáš Hudlický
DOI:10.1016/j.tet.2009.09.052
日期:2009.11
Whole-cell fermentation of β-bromoethylbenzene with the recombinant strain Escherichia coli JM109 (pDTG601) that over-expresses toluene dioxygenase provided the corresponding cis-dihydrodiol 19, which served as a starting material for both enantiomers of codeine. The key intermediate for the synthesis of (+)-codeine was diol 25b, whose Mitsunobu coupling with bromoisovanillin was followed by an intramolecular
用重组菌株β溴乙基苯的全细胞发酵大肠杆菌JM109(pDTG601),该过表达双加氧酶甲苯中提供的相应的顺式-dihydrodiol 19,其用作用于可待因两种对映体的起始材料。合成(+)-可待因的关键中间体是二醇25b,将其Mitsunobu与溴异香草醛偶联后,进行分子内Heck环化成醛35b。将该材料精制为乙烯基溴化物27b允许第二Heck环化36b。C-6立体异构中心的调整和加氢胺化完成了耳鼻喉科动物的合成-可待因从β-溴乙基苯起14步。二醇33B经由Mitsunobu反应转化为环氧化物29,其开口烯丙基与bromoisovanillin提供醚54,所述对映异构体35b中。( - ) -的合成可待因是通过两个环化的Heck和加氢胺化协议完成后,以类似的方式为的耳鼻喉科-codeine。另外,通过Mitsunobu反应和反式-二醇部分的环化,由二醇33b制备环氧化物29的两种对映异构体