Abstract
AbstractThe reactions of N‐methyl‐ and N‐phenylpyrazole derivatives with phosphorus(III) halides have been studied. The preparative method for synthesis of a variety of 4‐phosphorylated pyrazoles, including pyrazolyl substituted halo‐ and dihalophosphines, has been elaborated. Migration of an alkyl group from O to P(III) in 4‐phosphorylated 5‐alkoxypyrazoles was found to give a P‐ylides in a vinylogous manner with respect to the Arbuzov reaction. © 1995 John Wiley & Sons, Inc.
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