Probing the steric limits of rhodium catalyzed hydrophosphinylation. P–H addition vs. dimerization/oligomerization/polymerization

…, JJ Stone, PD Pickett, ES Tillman, RA Stockland

Index: Richard, Marcia E.; Reese, Kyle P.; Stone, Joshua J.; Pickett, Phillip D.; Tillman, Eric S.; Stockland Jr., Robert A. Journal of Organometallic Chemistry, 2011 , vol. 696, # 1 p. 123 - 129

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Citation Number: 5

Abstract

The reactivity of secondary phosphine oxides containing bulky organic fragments in hydrophosphinylation reactions has been investigated using several rhodium based catalysts. Upon heating in a focused microwave reactor, HP (O)(2-C6H4Me) 2 adds to prototypical terminal alkynes affording a complex mixture containing 1, 2 and 1, 1-addition products. Addition of a second ortho-substituent (HP (O) Mes2) completely suppresses the ...