Method of synthesizing tert-amido-substituted 2-(2'-hydroxypheny

Details Method of synthesizing tert-amido-substituted 2-(2'-hydroxypheny Method of synthesizing tert-amido-substituted 2-(2'-hydroxypheny

1996-10-23

1998-04-14

Morris, Patricia L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548259, C07D24920

Patent

active

057393486

ABSTRACT:
A method for preparing a compound of formula (III): ##STR1## wherein: R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, L, Z and p are as defined in the specification;
said process preferably comprising either a noble metal catalyzed hydrogenation or a non-catalytic reductive ring closure of an azo dye compound of formula (IV): ##STR2## where R11 is as defined in the specification, thereby performing a reductive ring closure and selective O-deacylation in a single process step.

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