Flexibility in the Partial Reduction of 2,5-Disubstituted Pyrroles: Application to the Synthesis of DMDP
作者:Timothy J. Donohoe、Catherine E. Headley、Rick P. C. Cousins、Andrew Cowley
DOI:10.1021/ol027504h
日期:2003.4.1
[reaction: see text] The partial reduction of electron-deficient 2,5-disubstituted pyrroles has been developed into a flexible procedure that gives control of relative stereochemistry by variation of the reduction conditions. After the reaction, the pyrroline products were dihydroxylated at C-3,4 to give either the cis or trans isomers; this flexibility means that a variety of polyhydroxylated pyrrolidines
[反应:见正文]已将缺电子的2,5-二取代的吡咯的部分还原发展成为一种灵活的方法,该方法可通过改变还原条件来控制相对立体化学。反应后,将吡咯啉产物在C-3,4二羟基化,得到顺式或反式异构体。这种灵活性意味着可以在很短的时间内制备出各种多羟基化的吡咯烷。最后,该方法被应用于天然存在的糖苷酶抑制剂DMDP的合成。