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Good to excellent stereoselectivity has been found in the addition reactions of Grignard and organozinc reagents to N‐protected aziridine‐2‐carboxaldehydes. Specifically, high syn selectivity was obtained with benzyl‐protected cis, tert‐butyloxycarbonyl‐protected trans, and tosyl‐protected 2,3‐disubstituted aziridine‐2‐carboxaldehydes. Furthermore, rate and selectivity effects of ring substituents,...
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