Process for the preparation of dipeptidylpeptidase inhibitors

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United States of America Patent

PATENT NO 9593119
APP PUB NO 20160272642A1
SERIAL NO

15076846

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Abstract

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The present invention provides a process for the preparation of linagliptin, a compound of Formula I, the process comprising deprotecting a compound of Formula II wherein R1 and R2 together with the nitrogen to which they are attached form a phthalimido group, wherein the aromatic ring of the phthalimido group is substituted with one or more R3 substituents selected from the group consisting of halogen, alkyl, nitro and amino; or R1 is H and R2 is selected from the group consisting of trialkylsilyl, 2-trialkylsilylethoxycarbamates, acetyl, trihaloacetyl, 9-fluorenylmethoxycarbonyl, trityl, alkylsulfonyl, arylsulfonyl, diphenylphosphine and sulfonylethoxycarbonyl.

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Patent Owner(s)

Patent OwnerAddress
GLENMARK LIFE SCIENCES LIMITEDSOLAPUR

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bhirud, Shekhar Bhaskar Mumbai, IN 50 83
Singh, Sunil Kumar Hyderabad, IN 40 196
Srivastava, Sachin N. Mumbai, IN 28 57

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