Sodium Bicarbonate → HCID 131710311, compound

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Reaction Steps

The α-sulfo-acylamido-3-halo-cephem compounds of the Formula I wherein Q is a sulfo group (-SO3H) are prepared by following the acylation procedures employed for the preparation of α-sulfobenzylpenicillins described by U.S. Pat. No. 3,660,379 and in the J. Med. Chem., 15 (11), 11-5 (1972); ibid, p. 1108. For example, 7-amino-3-chloro-3-cephem-4-carboxylic acid is reacted with α-sulfophenylacetyl chloride in a mixture of acetone and water containing an excess of sodium bicarbonate to yield 7-(α-sulfophenylacetamido)-3-chloro-3-cephem-4-carboxylic acid. Examples of α-sulfoacylamido-3-halo-cephems of the present invention are,

Provenance & Evidence