Iterative Design of a Biomimetic Catalyst for Amino Acid Thioester Condensation
作者:Huabin Wu、Handoko、Monika Raj、Paramjit S. Arora
DOI:10.1021/acs.orglett.7b02412
日期:2017.10.6
combines lessons learned from peptide biosynthesis, enzymes, and organocatalysts is described. The catalyst features a urea scaffold for carbonyl recognition and elements of nucleophilic catalysis. In the presence of 10 mol % of the organocatalyst, the rate of peptide bond formation is accelerated by 10000-fold over the uncatalyzed reaction between Fmoc-amino acid thioesters and amino acid methyl esters
Efficient acetylation and benzoylation of alcohols and phenols with acetic and benzoic anhydrides have been carried out under catalysis of bismuth(III) salts including BiCl3, Bi(TFA)3 and Bi(OTf)3. Selective acetylation and benzoylation of alcohols in the presence of phenols is an additional advantage of this procedure.
Benzoyl peroxide–imidazole: a novel and efficient reagent for the mild conversion of alcohols or phenols into benzoates
作者:Najmeh Nowrouzi、Seyedeh Zahra Alizadeh
DOI:10.1016/j.tetlet.2013.02.101
日期:2013.5
A very mild, one-pot, and expedient protocol for the conversion of alcohols and phenols into their corresponding benzoates using imidazole and benzoyl peroxide as a novel reagent is described.
Zinc oxide (ZnO) as a new, highly efficient, and reusable catalyst for acylation of alcohols, phenols and amines under solvent free conditions
作者:Mona Hosseini Sarvari、Hashem Sharghi
DOI:10.1016/j.tet.2005.09.002
日期:2005.11
Zinc oxide (ZnO) is a highlyefficient catalyst for the acylation of a variety of alcohols, phenols and amines with acid chlorides or acid anhydrides under solvent free conditions. Primary, secondary, tertiary, allylic and benzylic alcohols, diols and phenols with electron donating or withdrawing substituents can be easily acylated in good to excellent yield.
4-(<i>N,N</i>-Dimethylamino)pyridine Hydrochloride as a Recyclable Catalyst for Acylation of Inert Alcohols: Substrate Scope and Reaction Mechanism
作者:Zhihui Liu、Qiaoqiao Ma、Yuxiu Liu、Qingmin Wang
DOI:10.1021/ol4030875
日期:2014.1.3
4-(N,N-Dimethylamino)pyridine hydrochloride (DMAP·HCl), a DMAP salt with the simplest structure, was used as a recyclablecatalyst for the acylation of inert alcohols and phenols under base-free conditions. The reaction mechanism was investigated in detail for the first time; DMAP·HCl and the acylating reagent directly formed N-acyl-4-(N′,N′-dimethylamino)pyridine chloride, which was attacked by the