Process for the preparation of 3-(lpyroglutamyl)-L-thiazolidine-4-carboxylic acid derivatives
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United States of America Patent
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May 5, 1992
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N/A
app pub date -
Oct 9, 1990
filing date -
Oct 12, 1989
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Expired
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Abstract
3-(L-pyroglutamyl)-L-thiazolidine-4-carboxylic acid and derivatives thereof are prepared by condensing L-pyroglutamic acid or its substitution products, either in the presence of dicyclohexylcarbodiimmide or the like, or by condensation of active derivatives of L-pyroglutamic acid with 4-thiazolidine-carboxylic acid derivatives.
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