摘要 : Development of simple synthetic methods fromreadily available compounds to complex products is of utmostinterest in modern synthesis. Catalytic synthesis of cyclopropanesis important for diverse chemical applications. We present a... 展开 Development of simple synthetic methods fromreadily available compounds to complex products is of utmostinterest in modern synthesis. Catalytic synthesis of cyclopropanesis important for diverse chemical applications. We present amethod for the transformation of readily accessible alpha,beta-unsaturatedketones (chalcones) to cyclopropanes. A simple base, KOH,catalyzed the selective reduction of the enone carbonylfunctionality, dehydrogenative silylation, and deoxygenative cyclization of chalcones to provide the cyclopropane products.Chalcones with extended conjugation and 4-chromanone-based substrates also provided the corresponding cyclopropanes. One-potsynthesis of cyclopropanes directly from industrial feedstock compounds such as ketones and aldehydes is also demonstrated usingcatalytic KOH for both intermolecular condensation and dehydrogenative silylation-deoxygenative intramolecular cyclization cascade 收起