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The diacyl radical -CO-CO- .
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The polymerization kinetics of oxalyl chloride with 4,4'-isopropylidinediphenol (bisphenol A, BPA) in the presence of pyridine was studied and found that the molecular mass of the polymer was independent of reaction rate [14, 15].
The chemicals used were commercially available analytical grade reagents and used as received: oxalyl chloride, 4-dimethylaminopyridine (4-DMAP), cis/trans-1,4-cyclohexanedimethanol (CHDM) from Acros (Geel, Belgium); cadmium(II) nitrate tetrahydrate and zinc(II) nitrate hexahydrate from BDH (Poole, England); pyridine from Riedel- de Haen (Seelze, Germany); nitric acid (60% w/w), hydrochloric acid (32% w/w), and ethylenediaminetetraacetate-disodium salt (EDTA) from Scharlau (Barcelona, Spain), sodium perchlorate from Sigma-Aldrich (St.
Oxalyl chloride (0.9 mL, 0.1044 mol) was added dropwise, and the reaction mixture was stirred for 12 h at room temperature.
In the first step, the carboxyls of CM-[beta]-CD reacted with oxalyl chloride to form carboxymethyl chloride-[beta]-cyclodextrin through nucleophilic substitution.
Cinnamic acid dissolved in refluxing thionyl chloride with catalytic DMF was the preferred route for the synthesis of acyl chlorides destined for the synthesis of the ester, while the acyl chloride synthesized from cold oxalyl chloride in C[H.sub.2][Cl.sub.2] yielded much cleaner crude reaction mixtures and higher yields in the synthesis of the cinnamyl amide.
Again, refluxing thionyl chloride with catalytic DMF was used in the synthesis of the caffeate while cold oxalyl chloride in C[H.sub.2][Cl.sub.2] was preferred in the synthesis of the caffeamide.
The fatty acids were derivatized to form dimethylaminoethyl esters via a two-step condensation reaction using oxalyl chloride and dimethylaminoethanol as reagents.
Polyoxamide (POA) is a kind of polyamide with oxalyl unit in the main chain.
The mixture of 3-bromo-1-(3-chloropyridin-2-yl)-1H-pyrazole-5-carboxamide (5 mmole) and oxalyl chloride (10 mmole) in ClCH2CH2Cl (30 mL) was stirred at refluxing for 12 h.
In Scheme 1, oxalyl chloride (2.56 mL, 30.0 mmol) followed by one-two drops of DMF was added to a stirred suspension of 4-(1-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydro-2-naphthyl)vinyl)benzoic acid (413 mg, 1.19 mmol) in C[H.sub.2][Cl.sub.2] (60 mL).
Aspirin was added to oxalyl chloride solution in dichloromethane followed by addition of few drops of dimethylformamide [21].
The formation of these moieties is also reported through the formation of acyl chlorides through oxalyl chlorides and thionyl chloride and then reaction of corresponding acyl chlorides with amine.[15, 16] The use of oxalyl chloride or thionyl chloride results in the formation of carbon monoxide so chemical and safety measures should be maintained.