Abstract
Several phosphorus acids (methyl- and phenylphosphonic, diphenylphosphinic, and ethyl phosphoric acids) were round to give inters on reaction with tert-butyldimethylsilanol. The reactions occurred simply on beating the reactants in an inert solvent (hexane or toluene). The reaction is reversible, and yields or inters were improved by continuous water removal. The dibasic acids gave either mono- or disilyl inters; the latter were more easily purified and characterized. The OH groups on the surface or silica gel were also round to react with various phosphorus acids under similar conditions to give surface-bonded esters. Products were characterized by CP/MAS 31 P and 28 Si NMR
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