An efficient synthesis of trialkyl (E)-3-(3-Oxo-2-3,4-dihydro-2-(1H)-quinoxalinylidene)-prop-1-ene-1,2,3-tricarboxylate derivatives via a simple three-component reaction between benzene-1,2-diamines with dialkyl acetylenedicarboxylates in the presence of K2CO3-PEG catalytic system at 100 oC was reported. The desired products were obtained in excellent yields (88-92%). Various benzene-1,2-diamin...

an efficient synthesis of trialkyl (e)-3-(3-oxo-2-3,4-dihydro-2-(1h)-quinoxalinylidene)-prop-1-ene-1,2,3-tricarboxylate derivatives via a simple three-component reaction between benzene-1,2-diamines with dialkyl acetylenedicarboxylates in the presence of k2co3-peg catalytic system at 100 oc was reported. the desired products were obtained in excellent yields (88-92%). various benzene-1,2-diamin...

The title compound, C12H14N2O, was obtained by reaction of (±)-1-(1H-benzimidazol-2-yl)ethanol with 3-bromo-prop-1-ene. The asymmetric unit contains four crystallographically independent mol-ecules. In the crystal, mol-ecules 1 and 2 are linked via O-H⋯N hydrogen bonds, forming chains propagating along [010]. Molecules 3 and 4 are linked to these chains via O-H⋯O hydrogen bonds.

Two new multicomponent crystals consisting of 3,5-bis(4-methoxyphenyl)-4,5-dihydro-1H-pyrazole-1-carbothioamide (1) with 1,3-bis(4-methoxyphenyl)prop-2-en-1-one (2) and dimethylformamide (DMF), both in 1:1 ratio, prepared structurally characterized. The occurrence 1 different crystal structures enabled a comparison hydrogen bonding contacts between the two as well known structure pure 1. backbo...