通过伴随的裂解和 C(sp 2 )-N 键的形成,实现了苯甲酰肼/咔巴酸酯和伯/仲胺作为偶联伙伴的电化学酰胺化。该方法在无金属和无外源氧化剂的条件下进行,产生 N 2和 H 2作为副产物。机理研究揭示了来自苯甲酰肼和胺的酰基和N中心自由基的原位生成。该协议的实用性通过大规模合成苯扎贝特(一种高脂血症药物)得到证明。
Tertiary amine synthesis via reductive coupling of amides with Grignard reagents
作者:Lan-Gui Xie、Darren J. Dixon
DOI:10.1039/c7sc03613b
日期:——
reductive coupling reaction of Grignard reagents and tertiary amides affording functionalised tertiary amine products via an efficient and technically-simple one-pot, two-stage experimental protocol, is reported. The reaction – which can be carried out on gram-scale using as little as 1 mol% Vaska's complex [IrCl(CO)(PPh3)2] and TMDS as the terminal reductant for the initial reductive activation step –
Electrochemical Amidation: Benzoyl Hydrazine/Carbazate and Amine as Coupling Partners
作者:Tipu Alam、Amitava Rakshit、Hirendra Nath Dhara、Angshuman Palai、Bhisma K. Patel
DOI:10.1021/acs.orglett.2c02626
日期:2022.9.16
An electrochemical amidation of benzoyl hydrazine/carbazate and primary/secondary amine as coupling partners via concomitant cleavage and formation of C(sp2)–N bonds has been achieved. This methodology proceeds undermetal-free and exogenous oxidant-free conditions producing N2 and H2 as byproducts. Mechanistic studies reveal the in situ generations of both acyl and N-centered radicals from benzoyl
通过伴随的裂解和 C(sp 2 )-N 键的形成,实现了苯甲酰肼/咔巴酸酯和伯/仲胺作为偶联伙伴的电化学酰胺化。该方法在无金属和无外源氧化剂的条件下进行,产生 N 2和 H 2作为副产物。机理研究揭示了来自苯甲酰肼和胺的酰基和N中心自由基的原位生成。该协议的实用性通过大规模合成苯扎贝特(一种高脂血症药物)得到证明。