Carbonylative Suzuki coupling reactions catalyzed by ONO pincer–type Pd(II) complexes using chloroform as a carbon monoxide surrogate
作者:Samaresh Layek、Bhumika Agrahari、Rakesh Ganguly、Parthasarathi Das、Devendra D. Pathak
DOI:10.1002/aoc.5414
日期:2020.3
pincer–type palladium(II) complexes, [(PdL1(PPh3)] (1), [(PdL2(PPh3)] (2), and [(PdL3(PPh3)] (3), were synthesized by the reaction of the respective ligand, N‐(2‐hydroxybenzylidene)benzohydrazide (HL1), N‐(2‐hydroxy‐3‐methoxybenzylidene)benzohydrazide (HL2), or N‐(5‐bromo‐2‐hydroxybenzylidene) benzohydrazide (HL3), with Pd(OAc)2 and PPh3 in methanol and isolated as air‐stable reddish‐orange crystalline
苯甲酰Sch席夫碱连接了三个新的ONO钳型钯(II)络合物,[(PdL 1(PPh 3)](1),[(PdL 2(PPh 3)](2)和[(PdL 3(PPh 3)](3),是由各自的配体,反应合成ñ(2-羟基亚苄基)苯甲酰肼(HL - 1),ñ - (2-羟基-3-甲氧基亚苄基)苯甲酰肼(HL 2),或ñ - (5-溴-2-羟基苄叉)苯并肼(HL 3),含Pd(OAc)2和PPh 3在甲醇中分离,并以高稳定度(78%–83%)的形式分离为空气稳定的红橙色结晶固体。通过元素分析,傅立叶变换红外光谱,UV-可见,1 H核磁共振(NMR),13 C 1 H} NMR和31 P 11 H NMR光谱学研究。通过单晶X射线衍射研究明确建立了所有三种络合物的分子结构,该研究揭示了所有三种络合物的扭曲的正方形平面几何形状。ONO钳型配体在钯上占据三个配位点,而第四个位点被单齿三苯基膦配体占据。使用CHCl
BF<sub>3</sub>-Etherate-catalyzed tandem reaction of 2-formylarylketones with electron-rich arenes/heteroarenes: an assembly of isobenzofurans
作者:Pawan K. Mishra、Ankit Kumar、Akhilesh K. Verma
DOI:10.1039/d0cc02760j
日期:——
An efficient and BF3·Et2O-catalyzed chemoselective synthesis of diversified 1,3-diarylisobenzofuran in a high yield has been described. The reaction proceeds through sequential hydroarylation–cyclization between 2-formylarylketones and electron-richarenes/heteroarenes. Advantageous features of the developed methodology include operational simplicity, a broad substrate scope, and applicability towards
A highly sensitive fluorescent probe for bioimaging zinc ion in living cells and zebrafish models
作者:Zhengliang Lu、Wenlong Fan、Yanan Lu、Chunhua Fan、Huaiqing Zhao、Kai Guo、Wei Chu、Yizhong Lu
DOI:10.1039/c8nj02197j
日期:——
A simple OFF–ON fluorescent probe was prepared and successfully applied for bioimaging Zn2+ in living systems.
制备了一种简单的 "关-开 "荧光探针,并成功应用于生物系统中 Zn2+ 的生物成像。
A Versatile and Regiospecific Synthesis of Functionalized 1,3-Diarylisobenzofurans
作者:Jérôme Jacq、Cathy Einhorn、Jacques Einhorn
DOI:10.1021/ol801550a
日期:2008.9.1
A convenient, versatile, and regiospecific synthesis of functionalized 1,3-diarylisobenzofurans has been developed. It involves chemoselective addition of arylmagnesium reagents to the aldehyde function of o-aroylbenzaldehydes, themselves readily obtained by leadtetraacetateoxidation of N-aroylhydrazones of salicylaldehydes. Various functional groups, including nitro, iodo, or ester functionalities
Synthesis and antifungal activity of substituted salicylaldehyde hydrazones, hydrazides and sulfohydrazides
作者:Gregory L. Backes、Donna M. Neumann、Branko S. Jursic
DOI:10.1016/j.bmc.2014.07.022
日期:2014.9
Efficient synthetic procedures for the preparation of acid hydrazines and hydrazides were developed by converting the corresponding carboxylic acid into the methylester catalyzed by Amberlyst-15, followed by a reaction with hydrazine monohydrate. Sulfohydrazides were prepared from the corresponding sulfonyl chlorides and hydrazine monohydrate. Both of these group of compounds were condensed with substituted