Synthesis and molluscicidal activity of some new thiophene, thiadiazole and pyrazole derivatives

Utility of thiocarbamoyl moiety in synthesis of some new sulphur containing heterocyclic compounds and evaluation of their antimicrobial activity

“…Now, we have extended our synthetic program to the synthesis of otherwise inaccessible heterocyclic ring system, utilizing phenyl isothiocyanate as a key starting material. It is known that a great variety of reactants bearing the N=C=S fragment undergo cyclization on reaction with α-halocarbonyl compounds to afford thiophenes [18][19][20][21][22], thiazoles, 2,3-dihydro thiazoles [4], which have been shown to exhibit antiprotozoal [11], and fungicidal properties [8].…”

Synthesis and cytotoxicity of fused thiophene and pyrazole derivatives derived from 2-N-acetyl-3-cyano-4,5,6,7-tetrahydrobenzo[b]thiophene

“…In our strategy, we moved through studying the reactivity of compound 3 as an a-halocarbonyl compound to react with potassium sulfide salts of some active methylene compounds via the well-known Hantzsch reaction (Fadda et al, 2009). Thus, the reaction of the active methylene reagents namely malononitrile (14), ethyl cyanoacetate (12), acetylacetone (10a), or ethyl acetoacetate (10b) with phenylisothiocyanate (16) in dimethylformamide containing potassium hydroxide gave the intermediate potassium sulfide salts 17a-d.…”

Study on corrosion inhibition efficiency of some quinazoline derivatives on stainless steel 304 in hydrochloric acid solutions

“…351 Si, 1.640 Mn, 0.170 Co, 0.026 P, 0.014 S, 18.00 Cr, 8.80 Ni, 0.19 Mo, 0.16 Cu and 0.045 N. The inhibitors used were selected from quinazoline derivatives with chemical structures shown in Table 1. The quinazoline derivatives were prepared, purified and identified according to the recommended method [31] as follows:…”