Cyclopropanation of diazo ketones

Pfaltz has also examined enantiocontrol in the intramolecular cyclopropanation of diazo ketones (Eq. 5.15), and found relatively high enantioselectivity with the use of his semicorrin Cu(I) catalyst [38]. This catalyst is obviously superior to the salicylaldimine catalysts for intramolecular cyclopropanation reactions and, furthermore, enantiocontrol increases with an increase in the ring size from five to six. 

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See also in sourсe #XX -- [ , , ]

See also in sourсe #XX -- [ , , ]

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