Two-Step One-Pot Synthesis of Unsymmetrical (Hetero)Aryl 1,2-Diketones by Addition-Oxygenation of Potassium Aryltrifluoroborates to (Hetero)Arylacetonitriles
作者:Yogesh Kumar、Yogesh Jaiswal、Amit Kumar
DOI:10.1002/ejoc.201701625
日期:2018.1.31
An efficient two‐step one‐pot procedure for the synthesis of unsymmetrical (hetero)aryl 1,2‐diketones has been developed. The reaction proceeds through a palladium‐catalyzed nucleophilic addition of potassium aryltrifluoroborates to aliphatic nitriles followed by a copper‐catalyzedaerobic benzylic C–H oxygenation using molecular oxygen as a green oxidant.
An efficient synthesis of substituted isoxazolopyrroloisoquinolines via diastereoselective N-acyliminium ion cyclization
作者:Maria S. Ledovskaya、Alexander P. Molchanov、Vitaly M. Boitsov、Rafael R. Kostikov、Alexander V. Stepakov
DOI:10.1016/j.tet.2015.02.031
日期:2015.4
A simple and efficient strategy was developed for the synthesis of fused pyrrolo[2,1-a]isoquinolineringsystems. The 5- and 6-substituted isoxazolopyrroloisoquinolines were readily prepared via diastereoselective N-acyliminium ion cyclization of 5-(1-R(or 2-R)-substituted-2-phenylethyl)-6-hydroxytetrahydro-4H-pyrrolo[3,4-d]isoxazol-4-ones derived from the corresponding bicyclic dihydroisoxazoles.
开发了一种简单有效的策略来合成稠合的吡咯并[2,1- a ]异喹啉环系统。通过5-(1- R(或2- R)-取代的-2-苯基乙基)-6-羟基四氢-4 H-吡咯并[8,]的非对映选择性N-酰基离子环化反应,可以轻松制备5-和6-取代的异恶唑并吡咯并异喹啉[3, 4- d ]从相应的双环dihydroisoxazoles衍生异恶唑-4-酮。
Exploiting the Nucleophilicity of NH Imines: Synthesis of Enamides from Alkyl Azides and Acid Anhydrides
作者:Junghoon Han、Mina Jeon、Han Kyu Pak、Young Ho Rhee、Jaiwook Park
DOI:10.1002/adsc.201400584
日期:2014.9.15
The nucleophilicity of N‐unsubstituted imines, which were generated from alkyl azides by a ruthenium‐catalyzedreaction, was investigated in the reaction with acid anhydrides. The initial products were N‐acylimines, which isomerized to the corresponding enamides. Heating or triethylamine facilitated the isomerization of N‐acylimines that are stable at room temperature. A wide range of acyclic and cyclic
申请人:POSTECH Research and Business Development Foundation 포항공과대학교 산학협력단(220040433361) BRN ▼506-82-07303
公开号:KR20160059189A
公开(公告)日:2016-05-26
본 발명은 유기 아자이드 화합물로부터 질소에 치환기가 없는 이민을 발생시키고, 그와 아실 주개와의 반응을 통해 엔아마이드 화합물을 합성하는 방법에 관한 것이다. 본 발명의 제조 방법을 이용하면, 적절한 촉매를 사용하여 알파 수소를 가진 유기 아자이드로부터 연속한 질소 제거 및 1,2-수소 옮김 반응을 통해 질소에 치환기가 없는 이민을 생성하고, 이 이민과 아실 주개를 반응시켜 엔아마이드 화합물을 합성할 수 있다.
Phenylytterbium iodide has been found to react with ketones, aldehydes, esters, and nitriles to give alcohols and/or ketones. The reactions with esters at low temperature give ketones as main products, and the reactivity of esters to Ph–Yb–I is higher than that of ketones in contrast to the Grignard reaction.