Process for preparation of biphenyl derivatives

Details Process for preparation of biphenyl derivatives Process for preparation of biphenyl derivatives

1996-06-04

1998-06-02

Ford, John M.

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

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

540461, 544279, 544280, 548103, C07D47104, C07D48704, C07D25704

Patent

active

057602204

ABSTRACT:
A process is described for preparing a compound of the formula I: ##STR1## or a salt thereof; wherein X is a protecting group and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently hydrogen, C.sub.1-6 alkyl or C.sub.1-6 perfluoroalkyl, R.sub.5 is hydrogen or when n is 1 R.sub.5 taken together with R.sub.3 comprises a double bond; m is 1, 2 or 3; n is 0 or 1, and p is 0, 1 or 2.

REFERENCES:
patent: 5039814 (1991-08-01), Shuman et al.
patent: 5149699 (1992-09-01), Ellingboe et al.
patent: 5466692 (1995-11-01), Ellingboe et al.
E. Negishi et al., J. Org. Chem. 42, 1821 (1977).
J.E. Tilley et al., J. Med. Chem., 32, 1814 (1989).
A.S. Bell et al.,Synthesis, 843 (1987).

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