The mechanism of fragmentation of alkyl α-(oxyimino) benzylphosphonates; use of silica gel as a novel hydroxylic trapping reactant for an intermediate alkyl …
LD Quin, XP Wu, E Breuer, M Mahajna
Index: Quin, Louis D.; Wu, Xiao-Ping; Breuer, Eli; Mahajna, Mahmoud Tetrahedron Letters, 1990 , vol. 31, # 44 p. 6281 - 6282
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Citation Number: 16
Abstract
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.
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