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TUTCRIS

Lewis Base Catalyzed Intramolecular Reduction of Salicylaldehydes by Pinacol‐Derived Chlorohydrosilane

Tutkimustuotosvertaisarvioitu

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut2910-2917
JulkaisuEuropean Journal of Organic Chemistry
Vuosikerta2018
Numero23
DOI - pysyväislinkit
TilaJulkaistu - 1 kesäkuuta 2018
OKM-julkaisutyyppiA1 Alkuperäisartikkeli

Tiivistelmä

A newly developed stable chlorohydrosilane derived from pinacol is herein described. This was successfully used in the reduction of salicylaldehydes in reasonable to excellent yields (51–97 %). The ability of the hydrosilane to react as a reducing agent is increased upon the in situ formation of a trialkoxyhydrosilane and activation with a Lewis base, as further indicated by density functional theory studies. 1,3‐Dimethyl‐3,4,5,6‐tetrahydro‐2(1H)‐pyrimidinone (DMPU) was identified to be a suitable catalyst for this metal‐free reduction, promoting the regio‐ and chemoselective reduction of aldehydes in ortho‐position to phenols, despite the presence of vicinal ketones. The performance of pinacol‐derived chlorohydrosilane in the reduction of salicylaldehydes was further observed to be superior to that of well‐established commercially available chlorohydrosilanes.

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