The mechanism of fragmentation of alkyl α-(oxyimino) benzylphosphonates; use of silica gel as a novel hydroxylic trapping reactant for an intermediate alkyl …
Abstract Silica gel was employed to react with the suspected metaphosphate intermediate of the acid-promoted cleavage of monoalkyl α-(oxyimino) benzylphosphonates. The silica gels displayed CP-MAS 31 P NMR signals at about δ− 8. A similar value was obtained for silica gel phosphorylated with ethyl metaphosphate from a different source (thermolysis of a P- ethoxy 2, 3-oxaphosphabicyclo [2.2. 2] octene derivative.
