Highly enantioselective formal aza-Diels–Alder reactions with acylhydrazones and Danishefsky's diene promoted by a silicon Lewis acid
作者:Sharon K. Lee、Uttam K. Tambar、Nicholas R. Perl、James L. Leighton
DOI:10.1016/j.tet.2010.03.036
日期:2010.6
Silicon Lewis acid 3 is effective for the promotion of highlyenantioselective cycloaddition reactions of acylhydrazones with Danishefsky's diene (formal aza-Diels–Alderreactions). The reactions are conducted at ambient temperature for 15 min, and produce the products in good yield and with high levels of enantioselectivity. A remarkable solvent-dependent reversal in the sense of absolute stereochemical