一种用于合成简单实用的方法Ñ取代-2-氨基苯并经由与异硫氰酸酯2-碘苯胺交叉偶联反应是设想使用氧化物纳米铜作为可回收催化剂和Cs 2 CO 3作为PEG-碱400,在无配体条件下作为可生物降解,可重复使用,廉价且无毒的反应介质。本发明的串联方法强调了环境可接受性以良好至优异的产率获得各种N-取代的2-氨基苯并噻唑。
The present invention relates to compounds of formula (I)
wherein R
1
, R
2
, R
3
R
3a
and R
3b
are as provided in the description, and pharmaceutically acceptable salts thereof, for use in the treatment and/or prophylaxis of diseases which are associated with the modulation of CB1 receptors such as obesity.
<scp>Metal‐Free</scp> Synthesis of <scp>2‐Aminobenzothiazoles</scp> via <scp>I<sub>2</sub>‐Catalyzed</scp> Tandem Cyclization Reaction of Amines and Carbon Disulfide
作者:Ting Chen、Wei Feng、Ruitong Yang、Shanping Chen、Guo‐Jun Deng
DOI:10.1002/cjoc.202300610
日期:2024.4.15
A convenient approach for the construction of 2-aminobenzothiazoles via I2-catalyzed tandem cyclization reaction of amines and carbondisulfide has been developed. The present approach starts from simple and readily available starting materials, affording a series of 2-aminobenzothiazoles in up to 89% yields under metal-free conditions. In this work, C—H/N—H functionalization was achieved and multiple
开发了一种通过 I 2催化胺和二硫化碳的串联环化反应构建 2-氨基苯并噻唑的简便方法。本方法从简单且易于获得的起始原料开始,在无金属条件下以高达 89% 的产率提供一系列 2-氨基苯并噻唑。在这项工作中,实现了C—H/N—H功能化,并在一锅中成功构建了多个C-杂键。
2-AMINOBENZOTHIAZOLES AS CB1 RECEPTOR INVERSE AGONISTS
申请人:F. Hoffmann-La Roche AG
公开号:EP1638556B1
公开(公告)日:2008-04-02
Synthesis of N-substituted-2-aminobenzothiazoles using nano copper oxide as a recyclable catalyst under ligand-free conditions, in reusable PEG-400 medium
A simple and practical method for the synthesis of N-substituted-2-aminobenzothiazoles via a cross-coupling reaction of 2-iodo anilines with isothiocyanates is envisaged usingnano copper oxide as a recyclablecatalyst and Cs2CO3 as a base in PEG-400, as a bio-degradable, reusable, inexpensive and non-toxic reaction medium, under ligand-free conditions. The present tandem process underlines environmental
一种用于合成简单实用的方法Ñ取代-2-氨基苯并经由与异硫氰酸酯2-碘苯胺交叉偶联反应是设想使用氧化物纳米铜作为可回收催化剂和Cs 2 CO 3作为PEG-碱400,在无配体条件下作为可生物降解,可重复使用,廉价且无毒的反应介质。本发明的串联方法强调了环境可接受性以良好至优异的产率获得各种N-取代的2-氨基苯并噻唑。