A new and readily available bidentate ligand, namely, pyrrolidine-2-phosphonicacidphenylmonoester (PPAPM), has been developed for the copper-catalyzedformation of C-N, C-O, and P-C bonds, and various N-, O-, and P-arylation products were synthesized in good to excellent yields by using the CuI/PPAPM catalyst system. Addition of the PPAPM ligand greatly increases the reactivity of the copper catalyst
Expanding the Ligand Framework Diversity of Carbodicarbenes and Direct Detection of Boron Activation in the Methylation of Amines with CO<sub>2</sub>
作者:Wen-Ching Chen、Jiun-Shian Shen、Titel Jurca、Chun-Jung Peng、Yen-Hsu Lin、Yi-Ping Wang、Wei-Chih Shih、Glenn P. A. Yap、Tiow-Gan Ong
DOI:10.1002/anie.201507921
日期:2015.12.7
A simple and convergentsynthetic strategy used to increase the diversity of the carbodicarbene ligand framework through incorporation of unsymmetrical pendant groups is reported. Structural analysis and spectroscopic studies of ligands and their Rh complexes are reported. Reactivity studies reveal carbodicarbenes as competent organocatalysts for amine methylation using CO2 as a synthon. A unique BH‐activated
Cyanopyrrole-phenyl progesterone receptor modulators and uses thereof
申请人:McComas Cameron Casey
公开号:US20070027125A1
公开(公告)日:2007-02-01
Progesterone receptor modulators of formula I, or a pharmaceutically acceptable salt thereof,
wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, and R
7
are as defined herein. These compounds are useful for contraception and hormone replacement therapy. Also provided are products containing these compounds.
Borane–Trimethylamine Complex as a Reducing Agent for Selective Methylation and Formylation of Amines with CO<sub>2</sub>
作者:Yanmeng Zhang、He Zhang、Ke Gao
DOI:10.1021/acs.orglett.1c03023
日期:2021.11.5
borane–trimethylamine complex worked as an efficient reducing agent for the selectivemethylation and formylation of amines with 1 atm CO2 under metal-free conditions. 6-Amino-2-picoline serves as a highly efficient catalyst for the methylation of various secondary amines, whereas in its absence, the formylation of primary and secondary amines was achieved in high yield with high chemoselectivity. Mechanistic
我们在此报告,硼烷-三甲胺配合物可作为一种有效的还原剂,用于在无金属条件下用 1 个大气压的 CO 2对胺进行选择性甲基化和甲酰化。6-Amino-2-picoline 可作为各种仲胺甲基化的高效催化剂,而在没有它的情况下,伯胺和仲胺的甲酰化以高产率和高化学选择性实现。机理研究表明 6-amino-2-picoline-borane 催化系统像分子内受挫的 Lewis 对一样操作以激活 CO 2。
Copper-Catalyzed Arylation of Amines Using Diphenyl Pyrrolidine-2-phosphonate as the New Ligand
作者:Honghua Rao、Hua Fu、Yuyang Jiang、Yufen Zhao
DOI:10.1021/jo051221w
日期:2005.9.1
We have developed a general, efficient, and inexpensive catalyst system for arylation of amines by using 10 mol % of CuI as the copper source, 20 mol % of diphenyl pyrrolidine-2-phosphonate (DPP) as the ligand, K3PO4 as the base, and DMF containing 2% water (v/v) as the solvent.
我们已通过使用10%(摩尔)的CuI作为铜源,20摩尔%二苯基吡咯烷-2-膦酸酯(DPP)作为配体的,K开发用于胺的芳基化的一般,有效和廉价的催化剂体系3 PO 4作为碱,以及含有2%水(v / v)作为溶剂的DMF。