Process for the preparation of substituted 1,2,3,4-tetrahydrocar

Details Process for the preparation of substituted 1,2,3,4-tetrahydrocar Process for the preparation of substituted 1,2,3,4-tetrahydrocar

1996-02-29

1997-07-15

Haley, Jacqueline

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548441, C07D20988

Patent

active

056485000

ABSTRACT:
Substituted 1,2,3,4-tetrahydrocarbazoles of the formula ##STR1## having the meaning for R.sup.1 to R.sup.8 indicated in the description, can be prepared by catalytically hydrogenating a substituted phenol of the formula ##STR2## reacting the hydrogenation solution with a phenylhydrazine of the formula ##STR3## to give the hydrazone and cyclizing the hydrazone under acidic conditions.

REFERENCES:
patent: 3959309 (1976-05-01), Mooradian
patent: 4827032 (1989-05-01), Boshagen et al.
patent: 4988820 (1991-01-01), Boshagen et al.
Billman, J.H. et al., J. Am. Chem. Soc., 75, 1345-1346, Mar. 20, 1953.

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