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- W2097191810 abstract "Abstract New methods for the preparation of Cefdinir 1 and its polymorphic form Sesqui hydrate 1a are described. The synthesis of 2‐mercaptobenzothiazolyl (Z)‐2‐(2‐amino‐4‐thiazolyl)‐2‐acetoxyiminoacetate 4 was affected by using triphenylphosphine and triethylamine, and acylation of 7‐amino‐3‐vinylcephem‐4‐carboxylic acid 5 followed by deprotection with K2CO3 in the presence of ammonium chloride in the same pot yielded crude Cefdinir. Purification of crude Cefdinir through resin and treatment of the resulting wet product with trifluoroacetic acid gave highly pure TFA salt of Cefdinir 6, which on neutralization afforded 1a in excellent yield. The impurity profiling of this compound has also been discussed." @default.
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- W2097191810 date "2007-07-01" @default.
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- W2097191810 title "Improved Synthesis of Cefdinir and Its Polymorphic Form, an Antibacterial Active Pharmaceutical Ingredient" @default.
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- W2097191810 doi "https://doi.org/10.1080/00397910701397284" @default.
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