作者:Anna Cederbalk、Morten Lysén、Jan Kehler、Jesper L. Kristensen
DOI:10.1016/j.tet.2017.02.002
日期:2017.3
Morpholine amides are cheap and safe alternative to Weinreb amides as acylating agents of organometallic species. Herein, the in-situ lithiation/borylation of 18 ortho- meta- and para-substituted morpholine benzamides has been investigated. 10 of the 18 substrates provided the desired boronic esters as the major isomer (>90% regioselectivity) in crude isolated yields ranging from 68 to 93%. The synthetic
吗啉酰胺是Weinreb酰胺作为有机金属物种酰化剂的廉价且安全的替代品。在此,已经研究了18种邻位间和对位取代的吗啉苯甲酰胺的原位锂化/硼化。18种底物中的10种提供了所需的硼酸酯作为主要异构体(> 90%的区域选择性),分离出的粗品收率为68%至93%。随后通过激酶抑制剂的合成说明了此类构件的合成可用性。