[reaction: see text] The first catalytic, asymmetric 2,3-trans-selective heteroDiels-Alderreaction has been developed. The reactions of aldehydes with Danishefsky'sdienes proceeded smoothly to afford the pyranone derivatives in high yields with high trans-selectivities and enantioselectivities in the presence of a chiral zirconium complex, which was prepared from zirconium tert-butoxide and (R)-3
AnN,N′-Dioxide/In(OTf)3 Catalyst for the Asymmetric Hetero-Diels–Alder Reaction Between Danishefsky's Dienes and Aldehydes: Application in the Total Synthesis of Triketide
Methods of performing cycloadditions, reaction mixtures, and methods of performing asymmetric catalytic reactions
申请人:Rawal Viresh H.
公开号:US20100184999A1
公开(公告)日:2010-07-22
Methods of performing cycloadditions are described that include (a) combining a first reactant and a second reactant in a hydrogen bonding solvent to form a reaction mixture; and (b) reacting the first reactant and the second reactant to form a cycloadduct. Methods of performing asymmetric catalytic reactions are also described that include (a) combining a first reactant, a second reactant, and a catalytic amount of a chiral hydrogen-bond donor in a solvent to form a reaction mixture; and (b) reacting the first reactant and the second reactant to form an enantiomeric excess of a reaction product. Reaction mixtures corresponding to these methods are also described.