Morken; Bachand, Patrick C.; Swenson, Dale C., Journal of the American Chemical Society, 1993, vol. 115, # 13, p. 5430 - 5439
作者:Morken、Bachand, Patrick C.、Swenson, Dale C.、Burton, Donald J.
DOI:——
日期:——
Mild, Zinc-Induced Defluorination of Butatrienes: Stereoselective Formation of Divinylacetylene Derivatives
作者:Peter A. Morken、Donald J. Burton、Dale C. Swenson
DOI:10.1021/jo00087a030
日期:1994.4
Defluorination of R(Ph)C=C=C(Ph)R [R = C2F5 (3b); R n-C3F7 (3c)] was accomplished: under remarkably mild conditions: Zn/rt/18 h. Reaction of pure (E)- or (Z)-3b with Zn gave in both instances 89-96% (E,E)-CF3CF=C(Ph)C=CC(Ph)=CFCF3 in greater than 95% isomeric purity. The latter product was characterized by X-ray crystallography. Similarly, treatment of pure (E)or (Z)-3c with Zn gave 70-93% CF3CF2CF=C(Ph)C=CC(Ph)=CFCF2CF3 in 95% isomeric purity, although the stereochemistry could not be determined. A single electron transfer (SET) mechanism is proposed for the defluorination reaction.