Reactivity of diacyloxyiodobenzenes toward trivalent phosphorus nucleophiles
作者:S?awomir Makowiec、Janusz Rachon
DOI:10.1002/hc.10161
日期:——
equiv of sodium diisopropyl phosphite in THF produces diisopropyl 1-(diisopropoxyphosphinyl)ethylphosphonate with excellent yield. It was found that diacyloxyiodobenzene/PR3 system may serve as an acylating agent; the acylation process can proceed via carboxylic acid anhydride or acylphosphonium salt 17 depending on the protocol used. New very efficient method for synthesis of 2,4,6-trimethylbenzoic
Préparation d'anhydrides à partir d'acides carboxyliques et de tétracyanoéthylène
作者:Daniel Voisin、Bernard Gastambide
DOI:10.1016/s0040-4039(00)98536-8
日期:——
Symmetrical anhydrides are easily obtained at 20–80°C, with good yields, by action of tetracyanoethylene on organic carboxylic acids in benzene solutions containing an heteroaromatic nitrogen base or another base.
[EN] PROCESS FOR THE PRODUCTION OF DIACYL PEROXIDES<br/>[FR] PROCÉDÉ DE PRODUCTION DE PEROXYDES DE DIACYLE
申请人:NOURYON CHEMICALS INT BV
公开号:WO2020249688A1
公开(公告)日:2020-12-17
Process for the production of a diacyl peroxide involving the reaction of an anhydride with hydrogen peroxide, removal of the formed carboxylic acid, production of an anhydride from said carboxylic acid, and recycling of the anhydride within the process.
sphonate [DPPOx] has been newly introduced as a carboxyl-activating reagent which permits a facile direct preparation of 3-acyl-2-oxazolones and amides including peptides from a wide variety of carboxylicacids The 3-acyl-2-oxazolides also serve as versatile reactive agents for highlychemoselective acyl-transfer to the nucleophilic species such as amines, alcohols and thiols, providing convenient
Topically active carbonic anhydrase inhibitors. 1. O-Acyl derivatives of 6-hydroxybenzothiazole-2-sulfonamide
作者:O. W. Woltersdorf、H. Schwam、J. B. Bicking、S. L. Brown、S. J. DeSolms、D. R. Fishman、S. L. Graham、P. D. Gautheron、J. M. Hoffman
DOI:10.1021/jm00131a011
日期:1989.11
A series of O-acyl derivatives of 6-hydroxybenzothiazole-2-sulfonamide (4, L-643,799) was prepared and the potential utility of each series member as a topicallyactiveinhibitor of ocular carbonicanhydrase was determined. In vitro studies showed these esters to be substrates for ocular esterases which liberate 4 during corneal translocation. The most interesting series member, 2-sulfamoyl-6-benzothiazolyl