Synthesis and Application of 2-Arylazo-5-[styryl-4-(β-cyano/carbethoxy-β-cyanoethenyl)] -1,3,4-thiadiazoles. -The synthesis of title compounds (III) (6 examples) by condensation of thiadiazoles (II) with benzaldehydes (I) in the presence of acetic anhydride in moderate yields is reported. The fastn
Synthesis and application of 2-arylazo-5-[styryl-4-(β-cyano/-carbethoxy-β-cyanoethenyl)]-1,3,4-thiadiazoles
✍ Scribed by D. W. Rangnekar; V. R. Kanetkar; G. S. Shankarling; J. V. Malanker
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1999
- Tongue
- English
- Weight
- 167 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0022-152X
No coin nor oath required. For personal study only.
✦ Synopsis
A novel efficient synthesis of 2-arylazo-5-[styryl-4-( (\beta)-cyano/carbethoxy- (\beta)-cyanoethenyl)]-1,3,4-thiadiazoles was achieved by the condensation of 2-arylazo-5-methyl-1,3,4-thiadiazoles with 4 -( (\beta)-cyano- (\beta)-carbethoxyethenyl)benzaldehyde or 4-( (\beta, \beta)-biscyanoethenyl)benzaldehyde in the presence of acetic anhydride.
📜 SIMILAR VOLUMES
Acyl chlorides are split into acyl and chlorine radicals by light of wavelength 254 my. Since the dissociation energy of the chlorine-hydrogen bond is considerably larger than that of the acyl-hydrogen bond, substitution of the substrate by acyl radicals is observed on irradiation of acid chlorides.