Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1993-10-15
1995-04-25
Robinson, Allen J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
564423, 568765, C07C20936
Patent
active
054100836
ABSTRACT:
The invention relates to a novel process for preparing 4,6-diaminoresorcinol, a precursor to polybenzoxazole, from resorcinol according to the following scheme. ##STR1## Resorcinol (I) is reacted with a di-tert-alkylating reagent to form a 4,6,-di-tert-alkylresorcinol (II), which is then halogenated to form a 2-halo-4,6-di-tert-alkylresorcinol (III). The 2-halo-4,6-di-tert-alkylresorcinol is nitrated in one of two ways to form a 2-halo-4,6-dinitroresorcinol (IV), which is then hydrogenated to from the 4,6-diaminoresorcinol.
The invention also relates to a novel chemical composition-2-halo-4,6-di-tert-alkylresorcinol (III )--and a process for preparing same.
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Burn Brian M.
Robinson Allen J.
The Dow Chemical Company
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