Process for preparing 2-amino-5-nitrophenol derivatives

Details Process for preparing 2-amino-5-nitrophenol derivatives Process for preparing 2-amino-5-nitrophenol derivatives

1985-06-12

1988-05-10

Raymond, Richard L.

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

Organic compounds

Chalcogen in the nitrogen containing substituent

544138, 544365, 544377, 546192, 546226, 546233, 546237, 548256, 548261, 548336, 548518, 548525, 549472, 549487, 549504, 549505, 564 45, 564 46, 564 51, 564 52, 564 57, 564155, 564164, 564165, 564168, 564169, 564174, 564185, 564186, 564187, 564192, 564197, 564200, 564207, 564220, 564227, 564413, C07C14942, C07C 8760, C07C 9140, C07C10387

Patent

active

047435950

ABSTRACT:
A process for efficiently preparing 2-amino-5-nitrophenol derivatives in which benzoxazole derivatives are subjected to nucleophilic substitution reaction at the 5 position thereof to obtain corresponding benzoxazole derivatives, and the oxazole ring of the benzoxazole derivatives is then subjected to ring-opening to obtain 2-amino-5-nitrophenol derivatives. The 2-amino-5-nitrophenol derivatives are useful as industrial starting materials, reducing agents or antioxidants and intermediates for cyan-image-forming couplers.

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The "Element Effect" as a Criterion of Mechanism in Activated Aromatic Nucleophilic Substitution Reactions by J. E. Bunnett et al., pp. 385-391.
Chapter 13, entitled "Aromatic Nucleophilic Substitution", pp. 584-595.

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