Process for preparing oxazines

Details Process for preparing oxazines Process for preparing oxazines

1996-06-12

1998-03-17

Shah, Mukund J.

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

Organic compounds

Chalcogen in the nitrogen containing substituent

C07D26502

Patent

active

057288313

ABSTRACT:
A process for preparing a compound of formula III ##STR1## which comprises decarboxylating a compound of formula V ##STR2## wherein R.sup.20 is alkoxy and R.sub.1, R.sub.2, and R.sub.3 are independently hydrogen or C.sub.1-8 alkyl.

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patent: 5061310 (1991-10-01), Ooms et al.
patent: 5089046 (1992-02-01), Lee et al.
patent: 5336662 (1994-08-01), Lee
patent: 5565410 (1996-10-01), Lee

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