Studies on the Reaction of α‐Chloroformylarylhydrazine Hydrochloride¹ with N‐Heterocyclic Compounds

Abstract

In addition to pyridines, α‐chloroformylarylhydrazine hydrochloride 1 can also react with some N‐heterocyclic compounds. The cycloaddition of 1 with isoquinoline was achieved to obtain 3. The production of 4, 5, 6 given by cycloaddition of 1 with pyridazine was de pendent on the reaction condition. Some heterocyclic compounds bearing an X‐C=N (X:S, N) group on the ring can react with 1 to gain the derivatives of 2,4‐dihydro‐1,2,4‐triazol‐3‐one. 7, 8, 9 and 10 were given by reaction of 1 with 1,3,5‐triazine, 1,4,5,6‐tetrahydropyrimidine, 1,3‐thiazole and 2‐amino‐1,3‐thiazole, respectively. The reactions for 2‐amino‐1,3,4‐thiadiazole and 3‐amino‐1,2,4‐triazole had the same product 11.

New synthesis of highly potential efficient bluish-green electroluminescent materials based on 1,3,4-oxadiazole–triazolopyridinone–carbazole derivatives for single-layer devices

“…␣-Chloroformylarylhydrazine hydrochloride was synthesized according to our previous publish procedure [18]. We treated 1,3,4-oxadiazolepyridine-carbazole compound (3) with ␣-chloroformylarylhydrazine hydrochloride with various substituents, including H, CH 3 , and OEt groups at 80…”

“…EXPERIMENTAL [17][18][19] • C for 3 h. After the reaction was completed, the reaction mixture was extracted with EtOAc (150 × 2 mL). The combined EtOAc solutions were washed with water and saturated aqueous NaCl.…”

Synthesis and characterization of new blue‐greenish electroluminescent materials based on 1,3,4‐oxadiazole‐triazolopyridinone hybrids

“…Nicotinohydrazide [14] and α-chloroformylarylhydrazines hydrochloride [21] were synthesized according to literature procedures. All chemicals were reagent grade and used as purchased.…”