1118-84-9Relevant articles and documents
Ionic liquid-regulated sulfamic acid: Chemoselective catalyst for the transesterification of β-ketoesters
Bo, Wang,Ming, Yang Li,Shuan, Suo Ji
, p. 5037 - 5039 (2003)
1-Propyl-3-methylimidazolium chloride ([C3MIm]Cl) ionic liquid and sulfamic acid (NH2SO3H), as a synergetic catalytic medium, were used for the transesterification of acetoacetate with alcohols of different structures. It shows the good ability for the chemoselective transesterificatin of β-ketoesters and maintains its catalytic activity in the reuse.
Zinc mediated transesterification of β-ketoesters and coumarin synthesis
Chavan, Subhash P,Shivasankar,Sivappa,Kale, Ramesh
, p. 8583 - 8586 (2002)
The transesterification of ketoesters using zinc and iodine is described. The reaction has been done on a variety of alcohols and phenols. Alcohols furnish transesterified products whereas phenols gave 4-methylcoumarins. The method is highly promising compared with existing methods.
Niobium(V) oxide: A new and efficient catalyst for the transesterification of β-keto esters
De Sairre, Mirela Inês,Bronze-Uhle, érika Soares,Donate, Paulo Marcos
, p. 2705 - 2708 (2005)
Niobium(V) oxide is an efficient catalyst for the transesterification of β-keto esters with several kinds of alcohols, leading to good conversions. Moderate to good isolated product yields have been obtained at faster rates than those recently reported for various catalysts.
Mo-ZrO2 solid acid catalyst for transesterification of β-ketoesters
Reddy, Benjaram M.,Reddy, Vangala R.,Manohar, Basude
, p. 1235 - 1239 (1999)
An efficient and mild method for transesterification of β-ketoester catalyzed by Mo-ZrO2 solid acid catalyst is described.
BF3OEt2: An efficient catalyst for transesterification of β-ketoesters
Yang, Jinhui,Ji, Congbin,Zhao, Yanmin,Li, Yunfeng,Jiang, Shizhi,Zhang, Zhiwei,Ji, Yongqiang,Liu, Wanyi
, p. 957 - 963 (2010)
A facile and selective transesterification of β-ketoesters using BF3OEt2 as catalyst is described. The emphasis has been placed on the reaction of methyl acetoacetate with a series of alcohols of different structures, leading in all cases to good to excellent yields.
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Braine
, p. 419,422 (1954)
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Visible-light-driven radical 1,3-addition of selenosulfonates to vinyldiazo compounds
Li, Weiyu,Zhou, Lei
supporting information, p. 6652 - 6658 (2021/09/10)
Herein, we report a visible-light-driven radical 1,3-selenosulfonylation of vinyldiazo compounds with selenosulfonates, providing various γ-seleno allylic sulfones in good yields. This photochemical reaction was carried out at room temperature in an open flask using ethyl acetate as the solvent without any photocatalysts or additives. The control experiments corroborated that the 1,3-addition proceeded via a radical-chain propagation process. The synthetic applications of the resulting products were demonstrated by deselenization, reduction, bromination and allylation.
Ag-Cu nanoparticles as efficient catalysts for transesterification of β-keto esters under acid/base-free conditions
Yue, Hongmei,Yu, Hao,Liu, Sheng,Xu, Chunli
, p. 19041 - 19051 (2016/03/01)
Transesterification of β-keto esters and alcohols are traditionally catalyzed by acid or basic catalysts. However, these traditional catalysts do not always meet the requirements of modern synthetic chemistry which need to be highly efficient, selective, and environmentally friendly. In this work, Ag-Cu metal sites were first introduced as transesterification catalysts. The effect of the support, Ag:Cu molar ratio, and reaction conditions were investigated. The Ag-Cu metal sites were proved to be active in the β-ketoester transesterification with various alcohols, having yields comparable to the conventional acid- or base-catalysts.