Monoprotected Amino Acid (MPAA) Ligand Enabled C–H Alkynylation of Phenyl Acetic Acid
作者:Yue-Jin Liu、Zheng-Xin Zhou、Di Xie、Xiao-Peng Luo、Hao Wang、Bin Liu、Ming-Hua Zeng
DOI:10.1021/acs.orglett.8b03182
日期:2018.11.16
A weakly carboxylate-directed palladium(II)-catalyzed ortho-C–H alkynylation of diverse phenylacetic acids promoted by monoprotected amino acid ligand enabled is reported. The reaction has a broad substrate scope including α-secondary, tertiary, and quaternary phenylacetic acids. Notably, the direct ortho-C–H alkynylation of α-quaternary phenylacetic acids and chiral α-tertiary phenylacetic acids was
据报道,由单一保护的氨基酸配体促进了弱羧酸盐定向的钯(II)催化的多种苯基乙酸的邻-C-H炔基化反应。该反应具有广泛的底物范围,包括α-仲,叔和季苯基乙酸。值得注意的是,首次实现了α-季苯基乙酸和手性α-叔苯基乙酸的直接邻-C-H炔基化反应。而且,该方法可用于简单有效的克级合成和消炎药的多样化。