Abstract An efficient and simple approach for the direct synthesis of aryl and heteroaryl sulfonic esters was developed using DMS and DES as alkoxysulfonylation reagents. The reaction is operationally simple and scalable. This protocol does not require solvent, expensive catalysts, base, ligand additives or other reagents. A wide range of sulfonic esters were synthesized in moderate to good chemical
摘要 使用 DMS 和 DES 作为烷氧基磺酰化试剂,开发了一种直接合成芳基和杂芳基磺酸酯的有效且简单的方法。该反应操作简单且可扩展。该协议不需要溶剂、昂贵的催化剂、碱、配体添加剂或其他试剂。以中等至良好的化学产率合成了多种磺酸酯。这种方法的优点是成本低、简便易行且可耐受的基材范围广。图形概要
Copper-Catalyzed Multicomponent Reaction of DABCO·(SO<sub>2</sub>)<sub>2</sub>, Alcohols, and Aryl Diazoniums for the Synthesis of Sulfonic Esters
作者:Yang Wang、Lingling Deng、Yu Deng、Jianlin Han
DOI:10.1021/acs.joc.8b00447
日期:2018.4.20
A Cu-catalyzed multicomponent cascade reaction of DABCO·(SO2)2 (DABSO), alcohol, and aryl diazonium tetrafluoroborate was developed which afforded sulfonic esters in moderate to good chemical yields. In this reaction, the SO2 surrogate DABSO was used for the first time in the synthesis of sulfonic aliphatic esters. This multicomponent reaction was carried out under mild conditions and tolerated a wide
The present invention provides a nitrogen-containing heterocyclic compound represented by formula (I):
wherein W represents a nitrogen atom or —CH—;
X represents —C(═O)— or —CHR
4
— (wherein R
4
represents a hydrogen atom, or the like);
R
1
represents a group represented by the following formula:
[wherein Q
1
represents a nitrogen atom or —CR
8
— (wherein R
8
represents a hydrogen atom, substituted or unsubstituted lower alkyl, or the like). Q
2
represents —NR
15
— (wherein R
15
represents a hydrogen atom, or the like) and R
5
and R
6
may be the same or different and each represents a hydrogen atom, substituted or unsubstituted lower alkyl, or the like]; and
R
2
and R
3
may be the same or different and each represents a hydrogen atom, halogen, substituted or unsubstituted lower alkyl, or the like} or a pharmaceutically acceptable salt thereof, and the like.
Visible-light-induced one-pot synthesis of sulfonic esters <i>via</i> multicomponent reaction of arylazo sulfones and alcohols
作者:Truong Giang Luu、Tien Tan Bui、Hee-Kwon Kim
DOI:10.1039/d2ra02656b
日期:——
Sulfonic ester is a chemical structure common to many organic molecules, including biologically active compounds. Herein, a visible-light-induced synthetic method to prepare aryl sulfonic ester from arylazo sulfones was developed. In the present study, a one-pot reaction was carried out using arylazo sulfones, DABSO (DABCO·(SO2)2), and alcohols in the presence of CuI as a coupling catalyst and HCl
Catalyst for olefin polymerization and method for producing olefin polymers using the same
申请人:MITSUBISHI CHEMICAL CORPORATION
公开号:EP0759445A1
公开(公告)日:1997-02-26
A catalyst for olefin polymerization comprising the following Components (A) to (D), Component (D) being optional, in combination:
(A): a solid catalyst component comprising Ti, Mg, a halogen and an electron donor;
(B): an organoaluminum compound;
(C): a sulfonic ester represented by R4SO3R5 (R4 and R5: hydrocarbon group); and
(D): an organosilicon compound.
The electron-donating compound comprised in Component (A) is specified in one aspect of the invention.
Olefin polymers having excellent moldability and processability and extremely high crystallinity can be produced in high yield when the above catalyst is used.