Extraction of N-blocked amino acids from aqueous media

Details Extraction of N-blocked amino acids from aqueous media Extraction of N-blocked amino acids from aqueous media

1976-03-30

1977-11-22

Phillips, Delbert R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2602391, 544 20, C07C10352

Patent

active

040595730

ABSTRACT:
N-blocked amino acids, particularly derived from natural sources such as fermentation liquors, are extractively esterified from aqueous media by treatment of the aqueous solution with a diazoalkane, e.g. diphenyldiazomethane, in the presence of a water-immiscible organic solvent. Useful applications of the process include the extractive esterification of N-blocked derivatives of cephalosporin C and desacetyl cephalosporin C from fermentation broths.

REFERENCES:
patent: 3749641 (1973-07-01), Takahashi et al.
patent: 3840513 (1974-10-01), Umezawa et al.
patent: 3840516 (1974-10-01), Umezawa et al.
patent: 3846400 (1974-11-01), Umezawa et al.

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