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Hydroxycarboxylic acid anhydrides

Ethyl chloroformate/triethylamine Carboxylic acid anhydrides and amides from carboxylic acids via carboxylic alkoxyformic anhydrides Hydroxycarboxylic acid anhydrides and amides... [Pg.64]

The carbonylation of alkene in AcOH-acetic anhydride in the presence of NaCl affords the /9-acetoxycarboxylic anhydride 242 in good yields and the method offers a good synthetic method for / -hydroxycarboxylic acid 243[222],... [Pg.54]

Polyesters contain the ester group —COO— in the main chain. Many methods are suitable for their synthesis self-condensation of a,o>-hydroxy acids, ring-opening polymerization of lactones, the polycondensation of dicarboxylic acids with diols, transesterification, the polycondensation of diacyl chlorides with diols, polymerization of O-carboxy anhydrides of a- and jS-hydroxycarboxylic acids, and the copolymerization of acid anhydrides with cyclic ethers. The last reaction is commercially used in the curing of epoxides with anhydrides. [Pg.456]

Acetic anhydride pyridine a-Acylamino-a,j -ethylenecarboxylic acids from a-acylamino-j -hydroxycarboxylic acids... [Pg.271]

Acetic anhydride pyridine Lactones from hydroxycarboxylic acids... [Pg.482]

Acetic anhydride pyridine 4-Alkylidene-5-oxazolones from a-acylamino>/ >hydroxycarboxylic acids... [Pg.351]

See other pages where Hydroxycarboxylic acid anhydrides is mentioned: [Pg.457]    [Pg.457]    [Pg.43]    [Pg.54]    [Pg.28]    [Pg.54]    [Pg.54]    [Pg.61]    [Pg.347]    [Pg.20]    [Pg.423]    [Pg.109]    [Pg.69]   
See also in sourсe #XX -- [ Pg.19 , Pg.233 ]



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