The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 1988
Filed:
Jun. 12, 1985
Applicant:
Inventors:
Isamu Itoh, Minami-ashigara, JP;
Mitsunori Ono, Minami-ashigara, JP;
Hidetoshi Kobayashi, Minami-ashigara, JP;
Kazuyoshi Yamakawa, Minami-ashigara, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
544111 ; 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 ;
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.