Oxazolidine Synthesis by Complementary Stereospecific and Stereoconvergent Methods
作者:Michael B. Shaghafi、Robin E. Grote、Elizabeth R. Jarvo
DOI:10.1021/ol202068p
日期:2011.10.7
stereospecific and stereoconvergent reactions for enantioselective synthesis of 1,3-oxazolidines are reported. In the presence of a rhodium catalyst, reaction of enantioenriched butadiene monoxide with aryl imines is stereospecific (99% ee). Alternatively, the reaction of racemic butadiene monoxide, in the presence of a chiral palladium or nickel catalyst, provides an enantioselective synthesis of 1,3-oxazolidines
报道了对映选择性合成1,3-恶唑烷的互补立体定向反应和立体收敛反应。在铑催化剂的存在下,对映体富集的一氧化二丁烯与芳基亚胺的反应是立体定向的(99%ee)。或者,在手性钯或镍催化剂的存在下,外消旋一氧化二烯丁二烯的反应提供了1,3-恶唑烷的对映选择性合成(至多94%ee)。顺-或反-1,3-恶唑烷的合成也可以在催化剂的控制下完成。