Multiphase Catalysis in Temperature-Dependent Multi-Component Solvent (TMS) Systems. In: Leitner W, Hölscher M, editors. Regulated Systems for Multiphase Catalysis. Berlin: Springer Berlin Heidelberg; 2008. pp. 19-52. [DOI: 10.1007/3418_2006_057]

Hydrocarbon Soluble Recyclable Silylation Reagents and Purification Auxiliaries

Procedures using heptane-phase-selectively soluble octadecyldimethylsilyl groups to facilitate separations and silyl reagent regeneration are described. These results show that alcohols and alkynes protected by these groups are phase-selectively soluble in hydrocarbon solvents. In a thermomorphic cyclohexane/DMF system, >96% of the silylated alcohols are in the cyclohexane phase, allowing these compounds to be purified by a simple liquid/liquid extraction. Applications of these silylating agents in a Grignard synthesis and Sonogashira reaction are described.

Soluble polymer-supported hindered phosphine ligands for palladium-catalyzed aryl amination

Two structurally different heptane soluble polymers – polyisobutylene and poly(4-alkylstyrene) – are shown to be good supports for hindered biaryldicyclohexyl phosphine Pd(0) aryl amination catalysts.