Abstract
AbstractNon‐stabilized aryldiazoalkanes were utilized for highly enantioselective catalytic 1,3‐dipolar cycloaddition reaction in the presence of chiral oxazaborolidinium ion (COBI) as a Lewis acid catalyst. Enantioenriched 2‐pyrazolines were obtained in excellent yields (up to >99%) with excellent enantioselectivities (up to >99%).
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