Preparation and stereoselectivity of 1,3-dipolar cycloaddition ofD-glucose-derived nitrones to N-arylmaleimides
作者:L Fišera、U. A. R. Al-Timari、P. Ertl、N. Prónayová
DOI:10.1007/bf00814148
日期:1993.10
Nitrones 2 derived from D-glucose oxime and benzaldehydes without employing any protection of hydroxyl group were isolated in pure state. The 1,3-dipolar cycloaddition of 2 to N-arylmaleimides gave predominantly the anti isoxazolidines 3 and was rationalized by Z/E isomerization of N-glycosylnitrones 2. The structure and steric configuration of the products have been assigned on the basis of H-1- and C-13-NMR spectroscopy. AM1 calculations of the nitrones and MM2 calculations of the adducts were performed.