STERICALLY STRAINED CONJUGATED SYSTEMS CONTAINING A TRISUBSTITUTED FURAN RING. MOLECULAR STRUCTURE OF 5-DIMETHYLAMINO-2,4-BIS[2,2-DIMETHYL-4,6-DIOXO-1,3-DIOXAN-5-YLIDENE)METHYL]FURAN

Abstract

We have synthesized sterically strained conjugated systems containing a trisubstituted furan ring. We have used X-ray diffraction to study the three-dimensional structure of 5-dimethylamino-2,4-bis[(2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-ylidene)methyl]furan. We have shown that such sterically strained systems undergo nonclassical deformations with distortion of mainly bond angles, but without loss of planarity.

Authors: G. D. Krapivin, N. I. Val'ter, V. E. Zavodnik, T. Gracza, and T. Ya. Kaklyugina.

English Translation in Chemistry of Heterocyclic Compounds, 1999, 35 (11), pp 1286-1293

http://link.springer.com/article/10.1007/BF02251995