Regio- and Stereoselectivity of the Addition of O-, S-, N-, and C-Nucleophiles to the β Vinyl Oxirane Derived from d -Glucal
Valeria Di Bussolo, Micaela Caselli, Maria Rosaria Romano, Mauro Pineschi, Paolo Crotti
Abstract
Valeria Di Bussolo, Micaela Caselli, Maria Rosaria Romano, Mauro Pineschi, Paolo Crotti
Abstract
6-O-Trityl- (1a) and 6-(O-benzyl)-substituted epoxide (1b) derived from D-glucal were examined in their addition reactions with O-, C-, N-, and S-nucleophiles. A 1,4-regio- and beta-stereoselective or an anti 1,2-addition pathway is commonly observed depending on the ability of the nucleophile to coordinate with the oxirane oxygen. When TMSN(3) or LiN(3) are used as azide-based nucleophiles, a 1,2-syn-addition pathway is also observed.
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6-O-Trityl- (1a) and 6-(O-benzyl)-substituted epoxide (1b) derived from D-glucal were examined in their addition reactions with O-, C-, N-, and S-nucleophiles. A 1,4-regio- and beta-stereoselective or an anti 1,2-addition pathway is commonly observed depending on the ability of the nucleophile to coordinate with the oxirane oxygen. When TMSN(3) or LiN(3) are used as azide-based nucleophiles, a 1,2-syn-addition pathway is also observed.
Key concepts: Chemistry, Glucal, Nucleophile, Stereoselectivity, Epoxide, Azide, Regioselectivity, Medicinal chemistry