ChemInform Abstract: An Efficient One Pot Regioselective Synthesis of a 3, 3′‐Spiro‐phosphonylpyrazole‐oxindole Framework via Base Mediated [1, 3]‐Dipolar Cycloaddition Reaction of the Bestmann—Ohira Reagent with Methyleneindolinones. Issue 49 (December 2015)