Process for the preparation of 5-nitro-1,4-naphthoquinones
Comninellis, Christos; Osterwalder, Robert Ulrich; Plattner, Eric; Seifert, Gottfried
1987

Abstract

Title compds. I (R = H, C1-4 alkyl or alkoxy), useful as dye intermediates, are prepd. by oxidn. of nitronaphthalenes with Mn2(SO4)3. A melt contg. 173 parts 1-nitronaphthalene was treated over 30 min with 2200 parts of an aq. 36% Mn2(SO4)3-H2SO4 soln. which contained 0.9% Ce2(SO4)3. The mixt. was stirred at 60 Deg and after work-up gave .apprx.55% I (R = H) of 90-95% purity. [on SciFinder (R)]

Details

Title Process for the preparation of 5-nitro-1,4-naphthoquinones
Author(s) Comninellis, Christos ; Osterwalder, Robert Ulrich ; Plattner, Eric ; Seifert, Gottfried
Date 1987
Publisher (Ciba-Geigy A.-G., Switz.).
Note Alternative title(s) : (de) Verfahren zur herstellung von 5-nitro-1,4-naphthochinonen. (fr) Procédé de préparation de 5-nitro-1,4-naphtoquinone. (en) Process for the preparation of 5-nitro-1,4-naphthoquinone.
Other identifier(s) EPO Family ID: 4278752
Patent number(s) US4880571 (A)
EP0221022 (A3)
JPS62103044 (A)
EP0221022 (A2)
Laboratories GGEC
Record Appears in Scientific production and competences > SB - School of Basic Sciences > SB Archives > GGEC - Electrochemical Engineering Group
Work produced at EPFL
Patents
Record creation date 2006-02-22