Succinyl dichloride

Succinic anhydride (20 g), anhydrous ZnCl2 (1 g), and SOCl2 (34 g), reacting at 120° during 10 h, give analogously a 74% yield of succinyl dichloride.1094... 

Several possible mechanisms for the formation of salts from perfluoroglutaryl or -succinyl dichloride and arylamidoximes, as described above, have been presented the preferred route appears to be that summarized in Scheme 14, the reluctance of perfluoromalonyl dichloride to partake in... 

Dicarboxylic acid dichlorides with less than seven carbon atoms do not react to give tetraketones similar to 117, but instead undergo an intramolecular acylation (72) to give on hydrolysis the vinylogous acid anhydride (118), e.g., from succinyl chloride and the enamine (113). 

With some dibasic acids, the yields of the corresponding dialdehydes were unsatisfactory. For example, the reduction of succinyl dichloride267 and phthaloyl dichlo-ride268,269 gave, respectively, y-butyrolactone and phthalide as major products. With m- and / -phthalic dichlorides, however, the corresponding dialdehydes were obtained in 83 and 81% yields, respectively. 

Various methods are available for the preparation of the initial 1,4-dicarbonyl compound, for example, succinyl chloride (ethanedioyl dichloride) reacts in a Friedel-Crafts reaction with two equivalents of thiophene to make 1,4-diketone 5, which can then be converted into 2,2 5, 2"-terthiophene 6 (Scheme 8) [14], Similarly, the reaction of two equivalents of hetaryllithiums with V,V,V, Al -tetramethyl-succinamide gives the corresponding l,4-di(hetaryl)butane-l,4-diones, converted into the corresponding thiophenes using LR [15]. 

A series of simple OA polyamides is described by Hamoud et al [42]. These polymers were obtained in our laboratory by interfacial polycondensation of (+)-, and diaminopropane with succinyl, adipyl and sebacyl dichloride. With ClCO(CH2) COCl when the number of methylene residues n increased from 4 to 6 and 8, the yield of polymer increased from 2% to 40% and 95%. The anomalous chiroptical properties in the presence of various divalent salts have been investigated by Le Bris et al [43] they are further detailed by Dr Vert in his Chapter. 

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