Rapid Access to Kinase Inhibitor Pharmacophores by Regioselective C–H Arylation of Thieno[2,3-<i>d</i>]pyrimidine
作者:Shuya Yamada、Kaylin Nicole Flesch、Kei Murakami、Kenichiro Itami
DOI:10.1021/acs.orglett.0c00143
日期:2020.2.21
Regioselective C-H arylations of thieno[2,3-d]pyrimidine are accomplished under palladium catalysis. Thieno[2,3-d]pyrimidines react with aryl iodides at the C6-position and with aryl boronic acids at the C5-position, showing excellent regioselectivity. Mechanistic investigations indicate that the regioselectivity is controlled by the nature of the palladium catalyst: the cationic palladium favorably
噻吩并[2,3-d]嘧啶的区域选择性CH芳基化反应在钯催化下完成。噻吩并[2,3-d]嘧啶在C6位与芳基碘化物和在C5位与芳基硼酸反应,表现出出色的区域选择性。机理研究表明,区域选择性受钯催化剂的性质控制:阳离子钯有利地使C5-位芳基化。在激酶抑制剂及其衍生物的简化合成中,突出了这种直接芳基化的效用。