A Straightforward Access to Trifluoromethylated Spirobipyrazolines through a Double (3+2)-Cycloaddition of Fluorinated Nitrile Imines with Alkoxyallenes
A Straightforward Access to Trifluoromethylated Spirobipyrazolines through a Double (3+2)-Cycloaddition of Fluorinated Nitrile Imines with Alkoxyallenes
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