Process for the dehydration of dihydroxypiperidinedicarboxylates

Details Process for the dehydration of dihydroxypiperidinedicarboxylates Process for the dehydration of dihydroxypiperidinedicarboxylates

1992-01-21

1993-04-27

Cintins, Marianne M.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21102

Patent

active

052063690

ABSTRACT:
An improved process for dehydrating dialkyl 2,6-bis(trifluoromethyl)-2,6-dihydroxy-4-(alkyl)-3,5-piperidinedicarboxyla tes using concentrated sulfuric acid essentially in the absence of a solvent to prepare the corresponding dialkyl 2,6-bis(trifluoromethyl)dihydro-4-(alkyl)-3,5-pyridinedicarboxylates.

REFERENCES:
patent: 4692184 (1987-09-01), Lee
patent: 4908057 (1990-03-01), Chupp et al.
patent: 4908398 (1990-03-01), Li Bossi et al.
patent: 5051512 (1991-09-01), Baysdon et al.

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