Abstract
The development of synthetic methods to produce highly functionalized chiral 3-pyrrolines is of indisputable importance because of their prevalence in natural and synthetic bioactive molecules. Unfortunately, previous general cycloaddition approaches using allenoates, could not synthesize 3,4-disubstituted 3-pyrrolines. Herein, an original approach to yield 2,3,4-trisubstituted 3-pyrrolines with chirality at the 2-position is presented. A NiII /Fc-i-PrPHOX catalytic system facilitated a redox-neutral highly stereoselective process that exhibited an enantioselectivity of up to 99 %. Enantioenriched 3-pyrrolines can be converted to other valuable classes of N-heterocycles.
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