Iron-Doped Single-Walled Carbon Nanotubes as New Heterogeneous and Highly Efficient Catalyst for Acylation of Alcohols, Phenols, Carboxylic Acids and Amines under Solvent-Free Conditions
single-walled carbon nanotubes (Fe/SWCNTs) represent an efficient and new heterogeneous reusable catalyst for the acylation of a variety of alcohols, phenols, carboxylic acids and amines with acid chlorides or acid anhydrides undersolvent-freeconditions. The reactions of various primary, secondary, tertiary, and benzylic alcohols, diols, phenols, as well as aromatic and aliphatic amines give acylated
Bismuth Oxide Perchlorate as a Highly Efficient Catalyst for Heteroatom Acylation Under Solvent-Free Conditions
作者:Asit K. Chakraborti、Rajesh Gulhane、Shivani
DOI:10.1055/s-2003-41442
日期:——
Bismuth oxide perchlorate efficiently catalyzes the acetylation of structurally diverse phenols, alcohols, thiols, and amines undersolventfree conditions. Sterically hindered and electron deficient phenols are acetylated in excellent yields with stoichiometric amounts of Ac 2 O at room temperature. Acylation of acid-sensitive alcohols is carried out efficiently without competitive side reactions
高氯酸铋在无溶剂条件下有效催化结构不同的酚、醇、硫醇和胺的乙酰化。空间位阻和缺电子酚在室温下用化学计量的 Ac 2 O 以极好的收率乙酰化。酸敏感醇的酰化可以有效地进行,没有竞争性副反应。光学活性底物被乙酰化,对光学纯度没有任何不利影响。
Zirconium(IV) Chloride as a New, Highly Efficient, and Reusable Catalyst for Acetylation of Phenols, Thiols, Amines, and Alcohols under Solvent-Free Conditions
作者:Asit K. Chakraborti、Rajesh Gulhane
DOI:10.1055/s-2004-815442
日期:——
chloride has been found to be a new. highly efficient, and reusable catalyst for acetylation of structurally diverse phenols, thiols, amines and alcoholsundersolvent-free condtions. Acetylation of sterically hindered and electron deficient phenols is achieved in excellent yields with stoichiometric amounts of Ac 2 O at room temperature. Acid-sensitive alcohols undergo acetylation with excellent chemoselectivity
已发现氯化锆 (IV) 是一种新的。一种高效、可重复使用的催化剂,用于在无溶剂条件下对结构不同的酚、硫醇、胺和醇进行乙酰化。在室温下使用化学计量量的 Ac 2 O 以极好的收率实现空间位阻和缺电子酚的乙酰化。酸敏感醇以优异的化学选择性进行乙酰化,而不会发生脱水或重排等竞争性副反应。催化剂的温和路易斯酸性质使乙酰化能够与光学活性底物一起进行,而不会对光学纯度产生任何不利影响。
Fluoroboric acid adsorbed on silica gel as a new and efficient catalyst for acylation of phenols, thiols, alcohols, and amines
作者:Asit K. Chakraborti、Rajesh Gulhane
DOI:10.1016/s0040-4039(03)00683-x
日期:2003.4
Fluoroboric acid supported on silica gel efficiently catalyzes acylation of structurally diverse phenols, alcohols, thiols, and amines undersolventfree conditions. Acid-sensitive alcohols are smoothly acylated without competitive side reactions.
[EN] TARGETING DIAZO PRODRUGS FOR THE TREATMENT OF GASTROINTESTINAL DISEASES<br/>[FR] CIBLAGE DE PROMÉDICAMENTS DIAZO POUR LE TRAITEMENT DE MALADIES GASTRO-INTESTINALES
申请人:TRINITY COLLEGE DUBLIN
公开号:WO2009003970A1
公开(公告)日:2009-01-08
Provided herein are compounds, compositions and methods for decreasing NFkB DNA-binding activity in a patient comprising administering of a therapeutically effective amount of a compound or composition of the application to the patient to reduce, alleviate or treat various gastrointestinal diseases, such as inflammatory bowel disease (IBD).