Efficient Rh-II binaphthol phosphate catalysts for enantioselective intramolecular tandem carbonyl ylide formation-cycloaddition of alpha-diazo-beta-keto esters
Catalytic enantioselective tandem carbonyl ylide formation-cycloadditions of α-diazo-β-keto ester 1 using 0.5 mol% dirhodium tetrakis(1,1'-binaphthyl-2,2'-diyl phosphate) catalysts 7-9 and 14 to give the cycloadduct 3 in good yields and up to 90% ee are described.
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1999
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