作者:Pinar Kiliçkiran、Henning Hopf、Ina Dix、Peter G. Jones
DOI:10.1002/ejoc.201000018
日期:2010.7
diastereomers. Whereas 22 is inert towards sodium sulfide the higher vinylogs/ethynylogs 23–25 furnished the novel thiophene derivatives 28–31. The structures of several (22–25, 28, 29) of the new highly unsaturated compounds were determined by single-crystal X-ray structural analysis.
A General Route to Fully Terminally tert-Butylated Linear Polyenes
作者:Dagmar Klein、Pinar Kiliçkiran、Cornelia Mlynek、Henning Hopf、Ina Dix、Peter G. Jones
DOI:10.1002/chem.201000019
日期:2010.9.10
from the readily available α,β‐unsaturated ketone, 3‐tert‐butyl‐4,4‐dimethyl‐2‐pentenal, higher vinylogues, and fullyterminally tert‐butylated polyolefins with up to 13 consecutive conjugated double bonds have been prepared by either McMurry dimerization or Wittig chain‐elongation routes. The highly unsaturated conjugated π systems, which show a remarkable stability, have been characterized by spectroscopic