4- Chloro-o-phenylenediamine

Chloronaphthalene 40 Chloronitrobenzenes, 40 Chloropentafluoroethane, 40 Chlorophacinone, 40 4-Chloro-o-phenylenediamine, 40 Chlorophenols, 40 Chlorophenols, Mono, 40 Chloropicrin, 40 Chloroplatinic acid, 41 Chloroprene, 41... 

At about the same time, a group at Oxford reported their synthesis of a benzimidazole analogue of FA (290, R = H) (Scheme 3.53) [48, 156]. Initially, they envisioned that (290) could be obtained from acylation of glutamic acid with (288). The requisite acid chloride (288) was readily obtained in three steps from o-phenylenediamine via (286) and (287). Unfortunately, the extreme insolubility of (288) rendered it inactive towards basic solutions of glutamic acid or glycine. Therefore, an alternative approach was developed in which the chloromethylbenzimidazole (286) was used to alkylate (31) to yield (289), from which (290, R = H) was obtained following careful saponification. Repetition of this latter reaction sequence with 5-chloro-2-chloromethylbenzimidazole, available from 4-chloro-o-phenylenediamine dihydrochloride and chloroacetic acid, afforded (290, R = Cl) [156],... 

Selenium forms a volatile derivative, piazselenol, which can be subjected to GC analysis (Scheme 5.39). Young and Christian [612] treated selenium with 2,3-diaminonaph-thalene at pH 2.0 and extracted the resulting piazselenol into -hexane. With the use of an ECD, down to 5 10-I° g of selenium could be detected. The procedure, applied to the analysis of selenium in human blood, urine and river water, led to results equivalent to those obtained by neutron activation analysis. Similarly, Nakashima and Toei [613] performed the reaction of selenium (as selenious acid) with 4-chloro-o-phenylenediamine at pH 1 and extracted the derivative into toluene. They reported a detection limit of 0.04 jug. Shimoishi [614] analysed the content of selenium in metallic tellurium by this method. The sample was dissolved in aqua regia, followed by reaction with 4-nitro-o-phenylenediamine and extraction into toluene. Down to 10 ng of selenium could be determined using only a few milligrams of sample. Common ions did not interfere even when present in a large excess. Selenium in marine water was determined after the same derivatization step [615],... 

SYNS p-CHLORO-o-PHENYLENEDIAMINE 4-CHLORO-o-PHENYLENEDIAMINE 4-CHLORO-l, 2-PHENYLENEDIAMINE 4-Ci-o-PD 1.2-DIAMINO-4-CHLOROBENZENE 3,4-DIAJ.IINOCHLOROBENZENE... 

Chloroalloxazine (17) is the sole product of condensation of 4-chloro-o-phenylenediamine and alloxan in 1M hydrochloric acid, or in glacial acetic in the presence of boric acid. There is no evidence for the formation of 7-chloroalloxazine under these conditions. At a lower concentration of hydrochloric acid some of the 6-chloroquinoxaline-3-carboxyureide 18 is also formed. ... 

Chloro-3,4-diaminobenzene 4-Chloro-1,2-diaminobenzene. See 4-Chloro-o-phenylenediamine... 

Acetal Alloxan monohydrate Aluminum orthophosphate Benzoyl peroxide Bismuth Bismuth subcarbonate Boron Chaparral (Larrea mexicana) extract 4-Chloro-o-phenylenediamine Chondroitin sulfate Cyclodextrin p-Cyclodextrin 2-Decyl tetradecanoic acid Dichlorophene Diethylaminoethanol Dill (Anethum graveolens) seed oil Dimethicone/mercaptopropyl methicone copolymer p-Dimethoxybenzene Dimethoxymercaptopropyl-terminated polydimethylsiloxane homopolymer 1,1-Dimethyl-1-(2-hydroxypropylamine) tetradecanimide... 

Amino-2-nitrophenol o-Anisidine hydrochloride Bismuth citrate Black catechu (Acacia catechu) extract Chamomile Chamomile (Anthemis nobilis) oil 4-Chloro-o-phenylenediamine Chrysophanic acid Cobalt nitrate (ous) 2,4-Diaminoanisole sulfate tri hydrate... 

Chloro-p-phenylenediamine 4-Chloro-m-phenylenediamine 4-Chloro-o-phenylenediamine C6H7CIN2 H2O4S... 

A soln. of N,N -carbonyldiimidazole in dry tetrahydrofuran added rapidly with stirring to a cooled soln. of 4-chloro-o-phenylenediamine in the same solvent, the cooling bath removed, and stirring continued for 3 hrs. 5-chloro-2-benzimidazolone. Y 86%. F. e. s. W.B. Wright, Jr., J. Heterocyclic Ghem. 2, 41 (1965). 

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