M. George et al., RO-1H,3H-PYRROLO[1,2-C]OXAZOL-3-YLIDENE)-1-PROPENE 1,1-DICARBONITRILEAND PHENYL)-2,6-BIS(METHYLTHIO)PYRIDINE-3-CARBONITRILE, Acta crystallographica. Section C, Crystal structure communications, 54, 1998, pp. 1033-1036
The reaction of 3-aryl-2-cyano-5,5 -bis (methylthio)penta-2,4-dienenit
rile, (1), with L-(-)-2-hydroxymethylpyrrolidine, (2), gave two types
of product, the normal substitution product, (3), and a pyridine deriv
ative, (4). The structures of two representative examples, c]-oxazol-3
-ylidene)-1-propene-1,1-dicarbonitrile, (3a), as its hemibenzene solva
te, C17H15N3O.0.5C(6)H(6), and 4-(4-methoxyphenyl)-2,6-bis(methylthio)
pyridine-3-carbonitrile, (4b), C15H14N2OS2, have been unambiguously e
stablished by X-ray crystallographic analysis. The molecular packing o
f (4b) involves loosely held dimers, with S1...S1' distances of 3.424(
1) Angstrom.