Abstract
AbstractInter‐ and intramolecular cyclopropanations of a series of diazo Weinreb amides and trans‐allylic diazo Weinreb amide derivatives have been achieved using chiral ruthenium(II)‐Amm‐Pheox catalyst to give the corresponding chiral cyclopropyl Weinreb amides in excellent yield (up to 99%) with excellent enantioselectivity (up to 99% ee). The chiral products could easily undergo useful synthetic transformations to give the corresponding aldehydes, alcohols and ketones in high yields and enantioselectivities.magnified image
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