TCT-mediated synthesis of N-acylbenzotriazoles in aqueous media
摘要:
The synthesis of N-acylbenzotriazoles has been demonstrated by the 2,4,6-trichloro-1,3,5-triazine (TCT)-mediated condensation of carboxylic acids with H-1-benzotriazole in aqueous media. In saturated aqueous sodium bicarbonate, TCT was found to be relatively stable and functioned as an efficient acid activator in the acyl transfer process. This operationally simple and economic method allows the scalable synthesis of N-acylbenzotriazoles in good to excellent yields. (C) 2015 Elsevier Ltd. All rights reserved.
<i>N</i>-Acylbenzotriazoles: Neutral Acylating Reagents for the Preparation of Primary, Secondary, and Tertiary Amides
作者:Alan R. Katritzky、Hai-Ying He、Kazuyuki Suzuki
DOI:10.1021/jo000792f
日期:2000.12.1
Readily available N-acylbenzotriazoles 2a-q efficiently acylate aqueous ammonia and primary and secondaryamines to give primary, secondary, and tertiary amides in good to excellent yields. The wide applicability of the procedure is illustrated by the preparation of (i) alpha-hydroxyamides from alpha-hydroxy acids and of (ii) perfluoroalkylated amides.
Efficient Conversions of Carboxylic Acids into<i>O</i>-Alkyl,<i>N</i>-Alkyl and<i>O</i>,<i>N</i>-Dialkylhydroxamic Acids
作者:Alan R. Katritzky、Nataliya Kirichenko、Boris V. Rogovoy
DOI:10.1055/s-2003-42488
日期:——
Carboxylic acids were conveniently converted into unsubstituted, N-alkyl-, O-alkyl-, and O,N-dialkylhydroxamic acids via acylbenzotriazole intermediates. The ready availability of the reagents, mild conditions, and easy handling of the intermediates are advantageous.
[EN] THERAPEUTIC COMPOUNDS AND METHODS<br/>[FR] COMPOSÉS ET MÉTHODES THÉRAPEUTIQUES
申请人:UNIV MINNESOTA
公开号:WO2020010021A1
公开(公告)日:2020-01-09
Disclosed herein are compounds of formula I: (I) or pharmaceutically acceptable salts thereof, wherein R1, R2, and R3 may any of the values defined herein, as well as compositions comprising such compounds. Also disclosed are methods for treating diseases including neurodegenerative disorders such as Parkinson's Disease and Alzheimer's Disease.
Ketones undergo soft enolization and acylation on treatment with MgBr2·OEt2, i-Pr2NEt, and various acylating agents to give 1,3-diketones. The process is particularly efficient for N-acylbenzotriazoles and O-pentafluorophenyl esters, and, in these cases, is conducted using untreated, reagent grade CH2Cl2 open to the air, thus providing an exceptionally simple approach to the synthesis of this important class of compounds.
Sulfonyl derivatives of benzotriazole: Part 1. A novel approach to the activation of carboxylic acids
作者:Alan R. Katritzky、N. Shobana、Juliusz Pernak、A.S. Afridi、Wei-Qiang Fan
DOI:10.1016/s0040-4020(01)80459-2
日期:1992.1
and acid chlorides at 80 – 100°C. In cases when the corresponding acid chlorides are not available, 1-acylbenzotriazoles are conveniently available from 1-(1-methanesulfonyl)benzotriazole and the respective carboxylicacids as illustrated by the preparation of 2-, 3-, and 4-pyridoyl-, 2-pyrrolylcarbonyl- and 2-furoyl-benzotriazole in yields of 80 – 95%. Preparations of two sulfonyl derivatives of benzotriazole