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A-Acylaminocarboxylic acids esters

Reductive zj -oxazoline ring opening a-Acylaminocarboxylic acid esters... [Pg.321]

Not only acylimino acids (VI. B.) but also 2-alkylidene- and 2-aryli-dene-A -oxazolin-5-ones (55) (pseudooxazolones) add nucleophiles. Simultaneous ring opening is usually observed 195, 237, 238, 239, 397) yielding the corresponding amino acid derivatives. Reaction with ammonia or amines resp. alcohols yields a,a-diamino carboxylic acid esters (56) or a-alkoxy-a-acylaminocarboxylic acid esters (58) respectively. Mercaptans add so rapidly that mercaptooxazolinones (57) can be isolated and then opened with other nucleophiles. [Pg.284]

See other pages where A-Acylaminocarboxylic acids esters is mentioned: [Pg.466]    [Pg.274]    [Pg.207]    [Pg.207]    [Pg.20]    [Pg.461]    [Pg.463]    [Pg.216]    [Pg.325]    [Pg.351]    [Pg.253]    [Pg.253]    [Pg.297]    [Pg.17]    [Pg.22]    [Pg.229]    [Pg.364]    [Pg.417]    [Pg.284]    [Pg.595]    [Pg.423]   
See also in sourсe #XX -- [ Pg.26 , Pg.32 , Pg.224 ]



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Acylaminocarboxylic acid

Acylaminocarboxylic acid esters

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