已经开发了一种一锅法 Cu( I ) 辅助合成方法,用于通过使用碲双阴离子从 2-溴-N-芳基苯甲酰胺、苯甲醇和苯甲酸制备具有生物学重要意义的C 2 -对称螺二氮杂、苯甲氧基和苯甲氧基碲烷。 (Te 2- ) 在无碱条件下。此外,在相同的反应条件下,通过使用过量的 Na 2 Te 制备了 C-C 偶联联芳基 1,1'-二酰胺。合成的螺二氮杂碲烷可作为还原 H 2 O 2和硝基-迈克尔反应的有效催化剂。
已经开发了一种一锅法 Cu( I ) 辅助合成方法,用于通过使用碲双阴离子从 2-溴-N-芳基苯甲酰胺、苯甲醇和苯甲酸制备具有生物学重要意义的C 2 -对称螺二氮杂、苯甲氧基和苯甲氧基碲烷。 (Te 2- ) 在无碱条件下。此外,在相同的反应条件下,通过使用过量的 Na 2 Te 制备了 C-C 偶联联芳基 1,1'-二酰胺。合成的螺二氮杂碲烷可作为还原 H 2 O 2和硝基-迈克尔反应的有效催化剂。
Cu-Catalyzed Arylation of Bromo-Difluoro-Acetamides by Aryl Boronic Acids, Aryl Trialkoxysilanes and Dimethyl-Aryl-Sulfonium Salts: New Entries to Aromatic Amides
作者:Satenik Mkrtchyan、Michał Jakubczyk、Suneel Lanka、Michael Pittelkow、Viktor O. Iaroshenko
DOI:10.3390/molecules26102957
日期:——
copper-catalyzed directarylation. Readily available and structurally simple aryl precursors such as arylboronicacids, aryl trialkoxysilanes and dimethyl-aryl-sulfonium salts were used as the source for the aryl substituents. The scope of the reactions was tested, and the reactions were insensitive to the electronic nature of the aryl groups, as both electron-rich and electron-deficient aryls were successfully
We have developed a heterogeneous catalytic oxidative homocoupling reaction of dimethoxyanilides under an oxygen atmosphere. The resulting homo-dimers are useful for the construction of heterocycles, demonstrating the potential of heterogeneous metal catalysts.
An efficient synthesis of biaryl diamides via Ullmann coupling reaction catalyzed by CuI in the presence of Cs2CO3 and TBAB
作者:Fang Dong、Jian-Quan Liu、Xiang-Shan Wang
DOI:10.1007/s11164-018-3422-0
日期:2018.9
Abstract CuI accompanyied by Cs2CO3 and TBAB was confirmed to be an efficient catalyst combination to promote an Ullmanncouplingreaction. It facilitated 2-bromobenzamides to undergo a couplingreaction for the synthesis of symmetrical biaryldiamides in moderate yields at 120 °C under Pd-free conditions. Graphical Abstract
摘要 Cs 2 CO 3和TBAB伴随的CuI被证实是促进Ullmann偶联反应的有效催化剂组合。它促进了2-溴苯甲酰胺在无钯条件下于120°C进行偶联反应,以中等收率合成对称的联芳基二酰胺。 图形概要
A base-free copper-assisted synthesis of <i>C</i><sub>2</sub>-symmetric spirotelluranes and biaryls based on divergent stoichiometry of Na<sub>2</sub>Te
methodology has been developed for the preparation of biologically important C2-symmetric spirodiaza, benzyloxy and benzoxytelluranes from 2-bromo-N-aryl benzamides, benzyl alcohols, and benzoic acids by using the tellurium dianion (Te2−) under base-free conditions. Furthermore, C–C coupled biaryl 1,1′-diamides have been prepared by using an excess of Na2Te under the same reaction conditions. The synthesized
已经开发了一种一锅法 Cu( I ) 辅助合成方法,用于通过使用碲双阴离子从 2-溴-N-芳基苯甲酰胺、苯甲醇和苯甲酸制备具有生物学重要意义的C 2 -对称螺二氮杂、苯甲氧基和苯甲氧基碲烷。 (Te 2- ) 在无碱条件下。此外,在相同的反应条件下,通过使用过量的 Na 2 Te 制备了 C-C 偶联联芳基 1,1'-二酰胺。合成的螺二氮杂碲烷可作为还原 H 2 O 2和硝基-迈克尔反应的有效催化剂。