ROMPgel-Supported Triphenylphosphine with Potential Application in Parallel Synthesis
作者:Erik Årstad、Anthony G. M. Barrett、Brian T. Hopkins、Johannes Köbberling
DOI:10.1021/ol026008q
日期:2002.5.1
[GRAPHICS]ROMPgel-supported triphenylphosphine was synthesized in three steps (67%) from norbornadiene, 4-bromoiodobenzene, and chlorodiphenylphosphine. The supported reagent has a high loading (2.5 mmol/g) and favorable swelling properties in organic solvents. It has been utilized for the conversion of alcohols to halides, the reduction of ozonides, and the isomerization of alpha,beta-acetylenic esters and in the Staudinger reaction. In general, filtration of the resin from the reaction mixtures and evaporation gave the corresponding products in high yield and purity.
Multipolymer Solution-Phase Reactions: Application to the Mitsunobu Reaction
作者:Andrew M. Harned、Helen Song He、Patrick H. Toy、Daniel L. Flynn、Paul R. Hanson
DOI:10.1021/ja045188r
日期:2005.1.1
the first polymer-on-polymer Mitsunobureaction, in which a polymeric phosphine is used simultaneously with a polymeric azodicarboxylate, is reported. This strategy employs the use of soluble oligomers generated from ring-opening methathesis polymerization. 31P NMR analysis revealed that the two polymers were interacting to generate the Mitsunobu products. Application to several substrates, as well