Stereoselective Synthesis and Single Crystal X-Ray Structures of Some Sterically Congested Electron-poor N-Vinyl Pyrazole Derivatives

A one-pot synthesis of sterically congested electron-poor N-vinyl pyrazoles in fairly good yields by the reaction of ethyl 3-phenyl-2-propynoate, pyrazoles and triphenylphosphine

A one-step synthesis of [1,6]naphthyridine-2(1H)-thione (3a), pyrano[3,4-b]pyridine-2(1H)- thione (3b), thiopyrano[3,4-b]pyridine-2(1H)-thione (3c) and 6-oxoquinoline-2(1H)-thione

The solid product was collected by filtration and recrystallized from ethanol to afford compound 12 as pale yellow crystals.. On cooling, the precipitated solid was collected,

The results show that all carbon and oxygen atoms in the molecule are nearly coplanar except C(16), and molecules stack to a column arrangement owing to C–H ··· π interactions..

The tetramer formed by intermolecular C–H ··· O hydrogen bonds is seldom found in the crystal structure of stilbenes, probably because there are fewer oxygen atoms that can act

The key to their successful synthesis depends on the reaction of N-vinyl-1H-imidazole with the π -deficient compounds under basic con- ditions.. Reaction of the target imidazole

[r]

The packing of the molecules in the crystals in both complexes is consolidated by arene π − π stacking interactions between the sac rings and by intermolecular hydrogen bonds