Studies on lactams. VII. 6-Isothiocyanatopenicillanate and 7-isothiocyanatodeacetoxycephalosporanate and their reactions.

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Abstract
6-Isothiocyanatopenicillanate and 7-isothiocyanatodeacetoxycephalosporanate were prepared since they are valuable intermediates in the syntheses of penicillin and cephalosporin derivatives. When the reaction was carried out with those isothiocyanate compounds, addition products with dicyclohexylcarbodiimide were obtained as unexpected by-products. The isothiocyanate derivatives thus obtained were treated with benzylamine to give a penillic acid derivatives.

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