作者:Walter Haefliger、Edgar Klöppner
DOI:10.1002/hlca.19820650619
日期:1982.9.22
We describe here a synthesis of the morphine partial structures 28 and 36, and of their enantiomers, which uses 7-methoxy-benzofurancarboxylic acid as starting material. A key intermediate in this scheme is compound 15, which is converted, via 1,2-ketone shift, into 22. This latter is stereospecifically reduced to the alcohol 24 and converted to the amide 25. The diastereomer of 25 is afforded by stereospecific
我们在此描述吗啡部分结构28和36及其对映异构体的合成,其使用7-甲氧基-苯并呋喃甲酸作为起始原料。在该方案中的关键中间体是化合物15,其通过1,2-酮移位转化为22。后者立体定向还原为醇24并转化为酰胺25。25的非对映异构体是通过在15中立体定向引入乙氧基羰基以生成β-酮酸酯31,然后将酸32进行库尔修斯降解而得到的对酰胺34。