The overall sequence of Rh(II)-catalysed carbenoid generation, oxonium ylide formation and subsequent sigmatropic rearrangement utilising 3-diazo-2H-1-benzopyran-2,4(3H)-dione in cyclic ethers as solvents has been satisfactorily used to achieve the synthesis of several medium- to large-membered polyoxa macrocycles embodying the coumarin subunit.
Polyoxygenated Coumarins. Oxonium Ylides en route to Polyoxa-Macrocyclic Coumarins
GIOVENZANA, Giovanni Battista;
1999-01-01
Abstract
The overall sequence of Rh(II)-catalysed carbenoid generation, oxonium ylide formation and subsequent sigmatropic rearrangement utilising 3-diazo-2H-1-benzopyran-2,4(3H)-dione in cyclic ethers as solvents has been satisfactorily used to achieve the synthesis of several medium- to large-membered polyoxa macrocycles embodying the coumarin subunit.File in questo prodotto:
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