Auxiliary-Directed Pd-Catalyzed γ-C(sp<sup>3</sup>)–H Bond Activation of α-Aminobutanoic Acid Derivatives
作者:Kalyan Kumar Pasunooti、Biplab Banerjee、Terence Yap、Yaojia Jiang、Chuan-Fa Liu
DOI:10.1021/acs.orglett.5b03118
日期:2015.12.18
New bidentate auxiliaries derived from the isoxazole-3-carboxamide and oxazole-4-carboxamide moieties were used for Pd-catalyzed C(sp3)–H bond activation. The results show that, when placed on a primary amine compound, 5-methylisoxazole-3-carboxamide (MICA) directs Pd-catalyzed activation of inert γ-C(sp3)–H bonds for C–C bond formation. Selective and efficient arylation and alkylation of several α-aminobutanoic
衍生自异恶唑-3-甲酰胺和恶唑-4-甲酰胺基团的新双齿助剂用于Pd催化的C(sp 3)–H键活化。结果表明,当放置在伯胺化合物上时,5-甲基异恶唑-3-羧酰胺(MICA)指导Pd催化的惰性γ-C(sp 3)-H键的活化,从而形成C-C键。几种α-氨基丁酸衍生物的选择性和有效的芳基化和烷基化反应产生了各种γ-取代的非天然氨基酸。可以在非常温和的条件下方便地除去和回收MICA导向基团。