Amidation of Aldehydes and Alcohols through α-Iminonitriles and a Sequential Oxidative Three-Component Strecker Reaction/Thio-Michael Addition/Alumina-Promoted Hydrolysis Process to Access β-Mercaptoamides from Aldehydes, Amines, and Thiols
hydrolysis conditions for converting α‐iminonitriles into carboxamides have been developed. In combination with the oxidative three‐component Strecker reaction, the one‐pot direct amidation of aldehydes and alcohols is reported. Subsequently, an Yb(OTf)3‐catalyzed Michael addition of thiols to α,β‐unsaturated α‐iminonitriles is reported for the synthesis of β‐mercapto‐α‐iminonitriles. The successful integration
Copper-catalysed synthesis of 3-hydroxyisoindolin-1-ones from benzylcyanide 2-iodobenzamides
作者:Veerababurao Kavala、Chen-Yu Wang、Cheng-Chuan Wang、Prakash Bhimrao Patil、ChiaChi Fang、Chun-Wei Kuo、Ching-Fa Yao
DOI:10.1039/c9ob02329a
日期:——
An efficient one-pot two-step sequential reaction for the synthesis of biologically active 3-hydroxyisoindolin-1-one derivatives from 2-iodobenzamide derivatives and various substituted benzyl cyanides in the presence of CuCl and cesium carbonate in DMSO is reported. Furthermore, 3-hydroxyisoindolinone derivatives possessing bromo substituents were obtained from 2-iodobenzamide and 2-bromobenzyl cyanide
A convenient and general asymmetric transferhydrogenation of a wide array of 1-aryl-3,4-dihydroisoquinoline derivatives using a [RuIICl(η6-benzene)TsDPEN] complex in combination with a 5:2 HCOOH–Et3N azeotropic mixture as a hydrogen source was developed. Under mild reaction conditions, the described catalytic transformation secured a practical synthetic access to the corresponding valuable chiral
Visible light bromide catalysis for oxazoline, pyrrolidine, and dihydrooxazine syntheses <i>via</i> C<sub>sp<sup>3</sup></sub>–H functionalizations
作者:Navdeep Kaur、Elizabeth C. Ziegelmeyer、Olutayo N. Farinde、Jonathon T. Truong、Michelle M. Huynh、Wei Li
DOI:10.1039/d1cc04588a
日期:——
(N)-centered radical for a site-selective hydrogenatomtransfer (HAT) process. This strategy enabled the unconventional syntheses of a number of N-heterocycles dependent on the amide identity. We also discovered a nucleophilicity-dependent kinetic resolution for stereochemical differentiation of Csp3–H bonds that enabled the stereoselective synthesis of cis- and trans-oxazolines.
此处描述了催化苄基 C sp 3 –H 功能化协议。这种可见光介导的过程集中在利用溴化物催化剂和氧化剂来生成以氮 (N) 为中心的自由基,用于位点选择性氢原子转移 (HAT) 过程。这种策略使依赖酰胺身份的许多 N-杂环的非常规合成成为可能。我们还发现了 C sp 3 -H 键立体化学分化的亲核依赖性动力学分辨率,这使得顺式和反式恶唑啉的立体选择性合成成为可能。
An efficient copper mediated synthetic methodology for benzo[d]isothiazol-3(2H)-ones and related sulfur–nitrogen heterocycles
A copper mediated sulfur–nitrogen coupling reaction for the synthesis of benzo[d]isothiazol-3(2H)-ones and related sulfur–nitrogen heterocycles has been presented, which requires 2-halo-arylamides, sulfur powder, 25–50 mol % of copper iodide/1,10-phenanthroline, and potassium carbonate as base.
提出了铜介导的硫-氮偶联反应,用于合成苯并[ d ]异噻唑-3(2 H)-酮和相关的硫-氮杂环,该反应需要2-卤代芳基酰胺,硫粉,25-50摩尔%的碘化铜/ 1,10-菲咯啉和碳酸钾作为碱。