申请人:Commissariat a L'Energie Atomique et aux Energies Alternatives
公开号:US20170240485A1
公开(公告)日:2017-08-24
The invention relates to a method for (I) producing a carboxylic ester of formula (I). Said method comprises the steps of: a) bringing an organosilane/borane of formula Si or B into contact with CO
2
, in the presence of a catalyst and an electrophilic compound of formula (III), the groups R
1
, R
2
, R
3
, R
4
, R
5
, Y, and M′ being as defined in claim 1; and optionally b) recovering the compound of formula (I) produced.
A solvent-reagent selection guide for Steglich-type esterification of carboxylic acids
作者:Andrew Jordan、Kyran D. Whymark、Jack Sydenham、Helen F. Sneddon
DOI:10.1039/d1gc02251b
日期:——
The Steglich esterification is a widely employed method for the formation of esters under mild conditions. A number of issues regarding the sustainability of this transformation have been identified, chiefly the use of hazardous carbodiimide coupling reagents in conjunction with solvents with considerable issues such as dichloromethane (DCM) and N,N-dimethylformamide (DMF). To overcome these issues
Ester Formation via Symbiotic Activation Utilizing Trichloroacetimidate Electrophiles
作者:Nivedita S. Mahajani、Rowan I. L. Meador、Tomas J. Smith、Sarah E. Canarelli、Arijit A. Adhikari、Jigisha P. Shah、Christopher M. Russo、Daniel R. Wallach、Kyle T. Howard、Alexandra M. Millimaci、John D. Chisholm
DOI:10.1021/acs.joc.9b00745
日期:2019.6.21
Trichloroacetimidates are useful reagents for the synthesis of esters under mild conditions that do not require an exogenous promoter. These conditions avoid the undesired decomposition of substrates with sensitive functional groups that are often observed with the use of strong Lewis or Brønsted acids. With heating, these reactions have been extended to benzyl esters without electron-donating groups. These inexpensive
Selective Monoesterification of Symmetrical Diols Using Resin-Bound Triphenylphosphine
作者:Gunindra Pathak、Samuel Lalthazuala Rokhum
DOI:10.1021/acscombsci.5b00086
日期:2015.9.14
Coupling reactions to make esters and amides are among the most widely used organic transformations. We report efficient procedures for amide bond formation and for the monoesterification of symmetrical diols in excellent yields without any requirement for high dilution or slow addition using resin-bound triarylphosphonium iodide. Easy purification, low moisture sensitivity, and good to excellent yields
Transesterification for Synthesis of Carboxylates Using Aldehydes as Acyl Donors via C–H and C–O Bond Activations
作者:Yong-Sheng Bao、Chao-Yue Chen、Zhi-Zhen Huang
DOI:10.1021/jo3012573
日期:2012.9.21
A new type of transesterification between aryl, heteroaryl, alkyl N-heteroarene-2-carboxylates and various aldehydes by C–H and C–O bondactivations has been developed for the synthesis of versatile carboxylates. A possible mechanism containing oxidative addition of acyl–O bond in parent ester and radical cleavage of sp2 C–Hbond in aldehyde is proposed.