JOURNAL 1771


Organic Communications
VOLUME & ISSUE
Year: 2020 Issue: 3 July-September
PAGES
p.138 - 145
STATISTICS
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AUTHORS
  • Oshrat Levy-Ontman
  • Bar Tabibian
  • Stanislav Shaklein
  • Eyal Tzur
  • Adi Wolfson
PDF OF ARTICLE

GRAPHICAL ABSTRACT


ABSTRACT


Transfer hydrogenation of alkenes is a very attractive reduction pathway, as it does not involve hazardous metal hydrides or high pressure hydrogen. It can be easily performed with isopropanol as the solvent and hydrogen donor, using a homogenous or heterogeneous palladium catalyst. We present here, for the first time, that the addition of a xerogel composed of natural polysaccharides to the transfer hydrogenation of cyclohexene with palladium salts or Pd/C in isopropanol tremendously increased the reaction activity rate. The Carrageenans forms, and especially iota, were found to be the most useful additives in the two scales that were tested.

KEYWORDS
  • cyclohexene;
  • palladium catalyst
  • transfer hydrogenation