- 4. 4 '- dihydroxy - 3, 3' - diamino benzophenone preparation method
-
The invention discloses a preparation method of 4,4'-dihydroxy-3,3'-diamino diphenyl ketone. The preparation method is characterized in that common organic reagents (chlorobenzene and parachlorobenzoyl chloride) are used as raw materials to prepare the target product through organic reactions in four steps. Particularly, pollution-free 4,4'-dichloro-3,3'-dinitro diphenyl ketone with high industrial application value is adopted to prepare 4,4'-dihydroxy-3,3'-dinitro diphenyl ketone which is a hydrolyzate, and 4,4'-dihydroxy-3,3'- diamino diphenyl ketone is prepared by using pollution-free hydrazine hydrate reducing method which is simple in process.
- -
-
-
- Process for preparation of 3,3'- or 3,4'-diamino benzophenone
-
3,3'- or 3,4'-diamino benzophenone is prepared by catalytically reducing and dehalogenating, in the presence of a reduction catalyst and a dehydrohalogenation agent, a benzophenone compound or benzophenone compounds of the general formula STR1 in which X is a halogen atom at position 2 or 4 of the benzene ring and Y is hydrogen or a halogen atom and in which the nitro group is at position 3' or 4' of the benzene ring if Y is hydrogen, while Y is at position 4' and the nitro group is at position 3' of the benzene ring if Y is a halogen atom.
- -
-
-
- Synthesis and Anthelmintic Activity of Bisbenzimidazole-2-carbamates
-
The synthesis of bisbenzimidazole-2-carbamates (1-6) linked directly or by a one-atom bridge (CH2, CO, O, SO2, or S) at the 5 positions is described.Compound (4) shows interesting anthelmintic activity.
- Viswanathan, N.,Joshi, B. S.,Gawad, D. H.,Gokhale, U. B.,Sidhaye, A. R.,Rajasekariah, G. R.
-
p. 730 - 732
(2007/10/02)
-