Abstract Three new Schiff bases, (Z)-2-(4-(dimethylamino)benzylidene)-N-methylhydrazinecarbothioamide (PDM), (Z)-2-(2-hydroxy-5-nitrobenzylidene)-N-methylhydrazinecarbothioamide (5NS) and (Z)-2-(4-cyanobenzylidene)-N-methylhydrazinecarbothioamide (4CN) of thiosemicarbazone-benzaldehyde derivatives were synthesized by condensation reaction. These compounds formed from the reaction 4-methyl-3-thi...

A model for computing image ow in image sequences containing a very wide range of instantaneous ows is proposed. This model integrates the spatio-temporal image derivatives from multiple temporal scales to provide both reliable and accurate instantaneous ow estimates. The integration employs robust regression and automatic scale weighting in a generalized brightness constancy framework. In addi...

In the title compound, C(14)H(21)N(3)OS, inter-molecular N-H⋯O inter-actions generate ten-membered rings with R(2) (2)(10) ring motifs, whereas N-H⋯S inter-actions generate eight, 14- and 16-membered rings with R(2) (2)(8), R(4) (4)(14) and R(4) (4)(16) ring motifs, respectively. There are weak intra-molecular N-H⋯π inter-actions which might influence the conformation of the mol-ecule. The comp...

The title compound, C(17)H(19)N(3)O(3)S, crystallizes with two closely similar independent mol-ecules related by a pseudotranslation of c/2. Each mol-ecule consists of three approximately planar moieties centred on the N(2)CS group and the two ring systems. The packing involves classical H bonds of the form N(amide)-H⋯S and N(hydrazine)-H⋯OC, together with various weak hydrogen bonds and N(hydr...

Abstract A series of new quinazoline-4(3H)-one derivatives (2-16) have been synthesized using methyl α-[(4-oxoquinazolin-2-yl)thio]acetate (1) as precursor. The corresponding hydrazide (2) and thiosemicarbazide (4) were from this ester via the reaction with hydrazine hydrate ammonium thiocyanate respectively. was employed to synthesize 2-amino-1,3,4-thiadiazole (5) 1,3,4-triazole-5-thiol (6) it...