A new protocol has been developed for the borylation of conjugated alkenyl methyl ethers using B2Pin2 via C–O bond cleavage catalyzed by Ni(II). In this cross-coupling reaction, both E/Z isomers of alkenyl ethers are converted into (E)-alkenyl boronic esters with good reactivity. This transformation exhibits high chemoselectivity in the presence of competitive C–O bonds such as aryl ether, ester, amide
A compound of formula (I) or a pharmaceutically acceptable salt or prodrug ester thereof:
wherein the groups R1-R6 and A are as defined in the specification.
式(I)的化合物,或其药学上可接受的盐或前药酯:
其中,基团R1-R6和A如规范中所定义。
BICYCLIC AROMATIC COMPOUNDS USEFUL AS INHIBITORS OF MITOGEN-ACTIVATED PROTEIN KINASE-ACTIVATED PROTEIN KINASE-2
申请人:Heng Richard
公开号:US20090169558A1
公开(公告)日:2009-07-02
A compound of formula (I) or a pharmaceutically acceptable salt or prodrug ester thereof:
wherein the groups R1-R6, A and Y are as defined in the specification.