Process for the preparation of N,N-substituted...

Details Process for the preparation of N,N-substituted... Process for the preparation of N,N-substituted...

2007-07-17

2007-07-17

Kumar, Shailendra (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C564S153000, C560S020000, C560S043000

Reexamination Certificate

active

10433388

ABSTRACT:
The invention relates to a process for the preparation of a compound of formula (I), wherein R represents a 2,3-dihydroxy-1-propyl or a 1,3-dihydroxy-2-propyl radical, via direct amidation of a dialkyl ester of 5-amino-1,3-benzenedicarboxylic acid of formula (V), wherein R1represents a straight or branched (C1-C4)-alkyl group, with at least the stoichiometric amount of an amine of formula H2NR.

REFERENCES:
patent: 4250113 (1981-02-01), Nordal et al.
patent: 10-251211 (1998-09-01), None
patent: W0 00/29372 (2000-05-01), None
PCT International Search Report for PCT/EP01/13879 dated Apr. 3, 2002.
PCT International Preliminary Examination Report for PCT/EP01/13879 dated Feb. 20, 2003.

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