Journal
ORGANIC LETTERS
Volume 10, Issue 16, Pages 3603-3606Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol8013733
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Dirhodium(II) tetrakis[N-tetrachlorophthaloyl-(S)-tert-leucinate], Rh-2(S-TCPTTL)(4), is an exceptionally effective catalyst for enantioselective tandem carbonyl ylide formation-cycloaddition reactions of 2-diazo-3,6-diketoesters with arylacetylene, alkoxyacetylene, and styrene dipolarophiles, providing cycloadducts in good to high yields and with enantioselectivities of up to 99% ee as well as with perfect exo diastereoselectivity for styrenes.
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