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2-Acylamino-2-alkenoates

More drastic hydrolysis conditions of unsaturated oxazolones 448 leads to further hydrolysis of the intermediate 2-acylamino-2-alkenoic acid 449 and produces the corresponding a-keto acids 450. For example, phenylpyruvic acid " and other aryl(heteroaryl)pyruvic acids of biological interest have been obtained in this manner (Scheme 7.148). [Pg.230]

Hydrogenation of 2-Acylamino-2-alkenoic Acids and Esters with Rhodium Phosphane Catalysts General Procedure20 ... [Pg.1044]

In addition to rhodium phosphane complexes, ruthenium phosphane complexes have also been successfully applied as catalysis for enantioseleetive hydrogenation of 2-acylamino-2-alkenoic acids and esters1 71,72b 3, enol acetates 18 (R = i-Pr E = COOEt X = OCOCH3 98% ee with BINAP)137, and itaeonic acid138. The absolute configuration of the products from the ruthenium-catalyzed reactions shown below is opposite to that obtained with the corresponding rhodium catalysts. [Pg.1046]

Shin, C., M. Hayakawa, T. Suzuki, A. Ohtsuka, and J. Yoshimura a,p-Unsatur-ated Carboxylic Acid Derivatives. XIII. The Synthesis and Configuration of Alkyl 2-Acylamino-2-alkenoates and Their cyclized 2,5-Piperazinedione Derivatives. Bull. Chem. Soc. Japan 51, 550 (1978). [Pg.276]

See other pages where 2-Acylamino-2-alkenoates is mentioned: [Pg.2006]    [Pg.2005]    [Pg.2006]    [Pg.2005]    [Pg.405]    [Pg.405]    [Pg.2326]    [Pg.1034]    [Pg.1040]    [Pg.1043]    [Pg.1043]    [Pg.1047]    [Pg.405]    [Pg.299]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2006]    [Pg.2006]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2006]    [Pg.2006]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.2005]    [Pg.405]    [Pg.405]    [Pg.2326]    [Pg.2326]    [Pg.2326]    [Pg.2326]    [Pg.2326]    [Pg.2326]    [Pg.1034]    [Pg.1040]    [Pg.1043]    [Pg.1043]    [Pg.1047]    [Pg.282]   
See also in sourсe #XX -- [ Pg.299 ]



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