3-Amidocoumaranones

Details 3-Amidocoumaranones 3-Amidocoumaranones

1974-08-08

1976-11-23

Patten, James A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

424279, C07D49300

Patent

active

039936651

ABSTRACT:
3-Amidocoumaranones which may be substituted in the benzene ring by halo or alkyl; the compounds are obtained by treating an appropriate 2-hydroxyphenylacetic acid lactone with nitrous acid or with an ester, salt or chloride of nitrous acid in an acid medium to afford a coumaranedione-3-monoxime which is subjected to catalytic hydrogenation in the presence of an acid anhydride. The resulting 3-amidocoumaranone is an intermediate in the preparation of .alpha.-amino-2-hydroxyphenylacetic acid which can be used to synthesize antibiotics such as cephalosporin and penicillin derivatives.

REFERENCES:
patent: 2473484 (1949-06-01), Ullyot
Wislicenus et al., Ber. v. 42, (1909), pp. 1930-1940.

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