TBHP / R 4 N + X –偶氮二羧酸二烷基酯与甲基芳烃,醛,芳基甲醇和芳基甲基氯化物的加氢芳基化
摘要:
高效TBHP / R 4 Ñ + X -二烷基偶氮-1,2-二羧酸酯用甲基芳烃,醛,芳基甲醇和芳基甲基氯化物促进hydroaroylations进行说明。这些氧化/氧化和加氢芳基化过程是通过叔丁基氢过氧化物作为末端氧化剂/氧气源进行的,并被四丁基溴化铵和三辛基甲基氯化铵作为驱动力来催化。在这项研究过程中,发现所有这些加氢芳基化源都是高效试剂,不需要任何过渡金属。
Lewis- and Brønsted-acid cooperative catalytic radical coupling of aldehydes and azodicarboxylate
作者:Hong-Bo Zhang、Yao Wang、Yun Gu、Peng-Fei Xu
DOI:10.1039/c4ra05028b
日期:——
An efficient radical coupling reaction of aldehydes and azodicarboxylate was developed by using the strategy of merging Lewis- and Brønsted- acid catalysis.
Sequential Modifications of Metal–Organic Layer Nodes for Highly Efficient Photocatalyzed Hydrogen Atom Transfer
作者:Haifeng Zheng、Yingjie Fan、Abigail L. Blenko、Wenbin Lin
DOI:10.1021/jacs.3c02703
日期:2023.5.10
Zr-OTf-EY, through sequential modifications of metal cluster nodes in a metal–organic layer (MOL). With eosin Y and strong Lewisacids on the nodes, Zr-OTf-EY catalyzescross-couplingreactionsbetween various C–H compounds and electron-deficient alkenes or azodicarboxylate to afford C–C and C–N coupling products, with turnover numbers of up to 1980. In Zr-OTf-EY-catalyzed reactions, Lewisacid sites bind
We report the synthesis of acyl hydrazides from acylsilanes in the presence of visible light without the aid of additives or transition metals. Acylsilanes underwent [1,2]-Brook rearrangement to generate the nucleophilic siloxycarbenes which on further addition to N═N of azodicarboxylates produced the acyl hydrazides. Control experiments indicate that the reaction proceeds through the singlet carbene
<scp>Visible‐Light‐Mediated Photocatalyst‐Free</scp> Hydroacylation of Azodicarboxylic Acid Derivatives with <scp>4‐Acyl</scp>‐1,4‐dihydropyridines
作者:Li Liu、Jing Wang、Xiaoying Feng、Kun Xu、Wei Liu、Xia Peng、Hongguang Du、Jiajing Tan
DOI:10.1002/cjoc.202300726
日期:——
azodicarboxylic acidderivatives was described. This radical conjugate addition (RCA) protocol relied on the dual role of 4-acyl-1,4-dihydropyridine (acyl-DHP) reagents that besides being as radical reservoirs, they also enabled the conversion of radical adducts to anion intermediates viareduction. Under “catalyst-oxidant-additive free” conditions, a wide range of structurally different acyl hydrazide products