Process for preparing 1,2,3,6-tetrahydro-2,2,6,6-tetramethylpyri

Details Process for preparing 1,2,3,6-tetrahydro-2,2,6,6-tetramethylpyri Process for preparing 1,2,3,6-tetrahydro-2,2,6,6-tetramethylpyri

1998-07-24

2000-06-20

Kight, John

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21306

Patent

active

06077956&

ABSTRACT:
The invention relates to a process for preparing 1,2,3,6-tetrahydro-2,2,6,6-tetramethylpyridine from 4-hydroxy-2,2,6,6-tetramethylpiperidine in which 4-hydroxy-2,2,6,6-tetramethylpiperidine is dehydrated at elevated temperature in the gas phase over a solid acid catalyst.

REFERENCES:
Ozhogina et al, Chem. Als vol. 113 No. 17/846, "Anomolous Stability of a diminoxylpinacone under dehydration conditions", (1990).
R. Fankhauser, et al., Helvetica Chimica Acta, vol. 49, pp. 690-695, "Synthese Von 4-Chlorpiperidinen", (With English Summary), 1966.
J. March, John Wiley and Sons, Advanced Organic Chemistry, pp. 901-903, "Reactions", 1985.
D. BORDEAUX, et al., Acta Crystallographica Section C. Crystal Structure Communications, vol. 12, No. C39, pp. 1656-1659, Synthese de radicaux libres nitroxydes Derives du TeTramethyl-2,2,6,6 Tetrahydropridine-1,2,3,6; Structure de l'Epoxy-3,4 Tetramethyl,2,6,6 Piperidne-Oxyle, C.sub.9 H.sub.16 NO.sub.2, With English Abstract, 1983.
A. Hassner, et al., Tetrahedron Letters, vol. 36, No. 10, pp. 1709-1712, "A Simple Method of Preparation of 7-Alkyl-7-Azabicyclo[2.2.1]Heptanes", Mar. 6, 1995.

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