CuFe 2 O 4超顺磁性纳米粒子被用作可回收的多相催化剂,用于通过交叉脱氢偶联反应直接合成包含酚酯和苯并噻唑部分的化学结构。在纳米催化剂的存在下,几种底物对转化具有反应性,包括苯甲醛,苯甲醇,二苄基醚,2-氧代-2-苯基乙醛和2-碘-1-苯基乙酮。该纳米催化剂显示出比许多均相和非均相催化剂更高的催化效率。纳米CuFe 2 O 4通过使用磁铁可以很容易地将其分离,并且可以多次重复利用而不会显着降低催化性能。据我们所知,这些反应以前没有在文献中报道过。
Ceric Ammonium Nitrate (CAN) Promoted Pd<sup>II</sup>-Catalyzed Substrate-Directed<i>o</i>-Benzoxylation and Decarboxylative<i>o</i>-Aroylation
作者:Sourav Kumar Santra、Arghya Banerjee、Nilufa Khatun、Bhisma K. Patel
DOI:10.1002/ejoc.201403367
日期:2015.1
Inexpensive cericammoniumnitrate (CAN) is an efficient oxidant for the Pd-catalyzed substrate-directed o-benzoxylation and decarboxylative o-aroylation processes. In the presence of CAN, the reaction of directing arenes with carboxylic acids resulted in o-benzoxylated products, whereas a decarboxylative o-aroylation occurred by using α-keto acids, which led to the formation of o-aroylation products
廉价的硝酸铈铵 (CAN) 是 Pd 催化的底物导向邻苯甲氧基化和脱羧邻芳酰化过程的有效氧化剂。在 CAN 存在下,定向芳烃与羧酸反应生成邻苯甲酰化产物,而使用 α-酮酸发生脱羧邻芳酰化,从而形成邻芳酰化产物。
Palladium catalyzed ortho-halogenation of 2-arylbenzothiazole and 2,3-diarylquinoxaline
作者:Sourav Kumar Santra、Arghya Banerjee、Nilufa Khatun、Asim Samanta、Bhisma K. Patel
DOI:10.1039/c4ra15461d
日期:——
A Pd-catalysed mono and di-o-halogenation strategy has been demonstrated selectively using benzothiazoles and quinoxalines as the directing substrates.
使用苯并噻唑和喹啉作为定向底物,已经演示了一种Pd催化的单一和双卤代策略。
Cu(II)-catalyzed oxidative esterification of 2-carbonyl substituted phenols from the alcohol oxidation level
作者:Satyasheel Sharma、Jihye Park、Mirim Kim、Jong Hwan Kwak、Young Hoon Jung、In Su Kim
DOI:10.1016/j.tet.2013.08.079
日期:2013.11
A copper-catalyzed oxidative esterification of 2-carbonyl substituted phenols from the alcohol oxidation level is described. This protocol represents direct access to a range of 2-carbonylated aryl benzoate derivatives, which are important building blocks in the synthesis of natural and pharmacological compounds. (C) 2013 Elsevier Ltd. All rights reserved.
[EN] DATA STORAGE METHOD AND COMPOSITION<br/>[FR] PROCÉDÉ ET COMPOSITION DE STOCKAGE DE DONNÉES
申请人:SUMITOMO CHEMICAL CO
公开号:WO2021064405A1
公开(公告)日:2021-04-08
A method of recording data to a layer (101) of a recording medium in which an organic luminescent precursor composition is irradiated with a first light beam (103) and a second light beam (105), the first light beam having a write wavelength for conversion of the organic luminescent precursor composition to an organic luminescent composition and the second light beam having a write inhibition wavelength for inhibiting conversion of the organic luminescent precursor composition to the organic luminescent composition. The second light beam has a central area and a surrounding area; an intensity of the second light beam in the central area being lower than an intensity of the second light beam in the surrounding area. The first light beam extends across the central area and the surrounding area of the second light beam surrounds the first light beam.
Peroxide-Free Pd(II)-Catalyzed Ortho Aroylation and Ortho Halogenation of Directing Arenes
作者:Sourav Kumar Santra、Arghya Banerjee、Prakash Ranjan Mohanta、Bhisma K. Patel
DOI:10.1021/acs.joc.6b01170
日期:2016.7.15
A Pd(II)-catalyzed peroxide-free ortho aroylation of directing arenes has been developed via cross dehydrogenative coupling (CDC) in the presence of the terminal oxidant Cu(OAc)2·H2O. Ortho aroylation of directing arenes proceeds via decarbonylation of the in situ generated phenyl glyoxal, which is obtained from 2-acetoxyacetophenone in the presence of the oxidant Cu(OAc)2·H2O. However, changing the