Electrophilic Bis-fluorophosphonium Dications: Lewis Acid Catalysts from Diphosphines

Overview

Journal Chem Sci

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2017 Jul 19

PMID 28717457

Citations 7

Authors

Michael H Holthausen

Rashi R Hiranandani

Douglas W Stephan

Affiliations

Soon will be listed here.

Abstract

Stepwise oxidation of 1,8-bis(diphenylphosphino)naphthalene and a series of (oligo)methylene-linked diphosphines with XeF followed by fluoride abstraction yields a family of compounds featuring phosphine, phosphonium and phosphorane moieties in close proximity. The bisphosphonium ions [(CH)(PhPF)] () and [CH(PhPF)] () exhibit remarkable Lewis acidity arising from the proximity of the phosphonium centers. The effectiveness of bisphosphonium dications (, ) is examined in a series of Lewis acid catalysed transformations.

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