Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 5-(11bR)-Dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl-5H-dibenz[b,f]azepine, is researched, Molecular C34H22NO2P, CAS is 1265884-98-7, about Rhodium-catalyzed asymmetric arylative cyclization of meso-1,6-dienynes leading to enantioenriched cis-hydrobenzofurans.Reference of 5-(11bR)-Dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl-5H-dibenz[b,f]azepine.
A tandem rhodium-catalyzed asym. arylative cyclization of cyclohexadienone-containing meso-1,6-dienynes is developed. A series of optically pure cis-hydrobenzofurans were obtained with high to excellent yields (80-99%) and excellent enantioselectivities (95-99% ee). The utility of this method was demonstrated by transforming the cyclization products to chiral frameworks of some natural products.
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Reference:
1,3-Benzodioxole – Wikipedia,
Dioxole | C3H4O2 – PubChem