Mitsunobu Reaction Using Basic Amines as Pronucleophiles
作者:Hai Huang、Jun Yong Kang
DOI:10.1021/acs.joc.7b00622
日期:2017.7.7
reaction to include amine nucleophiles to form C–N bonds through the utilization of N-heterocyclic phosphine-butane (NHP-butane) has been developed. Both aliphatic alcohols and benzyl alcohols are suitable substrates for C–N bond construction. Various acidic nucleophiles such as benzoic acids, phenols, thiophenol, and secondary sulfonamide also provide the desired products of esters, ethers, thioether
[EN] PROCESS FOR PRODUCING CARBOXYLIC ACID ESTER<br/>[FR] PROCÉDÉ DE PRODUCTION D'ESTER D'ACIDE CARBOXYLIQUE
申请人:SUMITOMO CHEMICAL CO
公开号:WO2012026617A1
公开(公告)日:2012-03-01
The present invention relates to a process for producing a carboxylic acid ester, comprising a step of oxidizing an aldehyde by mixing an alcohol, carbon dioxide, the aldehyde and at least one compound selected from the group consisting of compounds represented by the formulae (2-1) and (2-2): wherein R2 represents an alkyl group optionally having a substituent or the like; R3 and R4 each independently represents an alkyl group optionally having a substituent or the like or R3 and R4 are linked together to form a divalent hydrocarbon group optionally having a substituent or the like; Y represents a group of -S- or a group of -N(R5)-, wherein R5 represents an alkyl group optionally having a substituent or the like, or R5 is linked to R4 to form a divalent hydrocarbon group optionally having a substituent; and R8 represents an alkyl group.
A Visible‐Light Driven Esterification of Aldehydes Catalyzed by VOSO
<sub>4</sub>
作者:Silvia Gaspa、Luca Ledda、David d'Atri、Andrea Porcheddu、Luisa Pisano、Massimo Carraro、Lidia De Luca
DOI:10.1002/adsc.202201134
日期:2023.2.21
An esterification of the C−H bond of aldehydes promoted by oxidovanadium(IV) sulfate, VIVOSO4, is reported. The process is mediated by visible-light, is carried out at room temperature, in absence of additives and using H2O2 as a benign oxidant. VOSO4 is a commercially available, earth-abundant metal (EAMs) salt, that does not require to be prepared. This report opens intriguing perspectives for the
据报道,硫酸氧钒 (IV) 促进了醛的 C-H 键酯化,V IV OSO 4。该过程以可见光为媒介,在室温下进行,没有添加剂,使用 H 2 O 2作为良性氧化剂。VOSO 4是一种市售的地球储量丰富的金属 (EAM s ) 盐,无需制备。该报告为钒盐在卤化过程以及 C−H 活化中的扩展应用开辟了有趣的视角,并在地球丰富的金属基催化领域做出了贡献。
Visible Light-Promoted Oxidative Cross-Coupling of Alcohols to Esters
作者:Andrea Dellisanti、Elisa Chessa、Andrea Porcheddu、Massimo Carraro、Luisa Pisano、Lidia De Luca、Silvia Gaspa
DOI:10.3390/molecules29030570
日期:——
Ester is one of the most significant functional groups in organic chemistry and is enclosed in several valued molecules. Usually, esters are prepared through the acid-catalyzed esterification reaction of carboxylic acids with alcohols, transesterification of esters with alcohols, or via activation of carboxylic acids followed by the addition of alcohols. However, these procedures typically imply the
酯是有机化学中最重要的官能团之一,包含在几个有价值的分子中。通常,酯是通过羧酸与醇的酸催化酯化反应、酯与醇的酯交换反应或通过活化羧酸然后添加醇来制备。然而,这些程序通常意味着反应物的过量使用和苛刻的反应条件。可见光介导的光反应已被公开为传统方法的安全、可持续且易于使用的替代方案,并在有机过程中引领新的反应模式。在这种背景下,我们提出了一种基于过渡金属和有机基的无光催化剂的可见光诱导醇合成酯的方法。该方法可以使用太阳光或人造可见光作为太阳模拟器或蓝色 LED 光源来进行。
Organocatalyzed Anodic Oxidation of Aldehydes
作者:Eric E. Finney、Kelli A. Ogawa、Andrew J. Boydston
DOI:10.1021/ja304716r
日期:2012.8.1
A method for the catalytic formation of electroauxiliaries and subsequent anodic oxidation has been developed. The process interfaces N-heterocyclic carbene-based organocatalysis with electro-organic synthesis to achieve direct oxidation of catalytically generated electroactive intermediates. We demonstrate the applicability of this method as a one-pot conversion of aldehydes to esters for a broad range of aldehyde and alcohol substrates. Furthermore, the anodic oxidation reactions are very clean, producing only H-2 gas as a result of cathodic reduction.