Copper‐Catalyzed B(dan)‐Installing Allylic Borylation of Allylic Phosphates

摘要

Abstract γ‐Selective B(dan)‐installing allylic borylation was found to proceed efficaciously by the reaction of an unsymmetrical diboron, (pin)B−B(dan), with allylic phosphates under copper catalysis. The resulting allyl−B(dan) was convertible into 1,3‐, 1,2‐, or 1,1‐diborylalkanes with different boron‐Lewis acidity by B(pin)‐installing hydroboration, and its C(sp3)−B(dan) bond turned out to be preferentially transformed into a C(sp3)−N bond, leaving the B(pin) intact, despite its well‐accepted inertness toward various transformations.

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