A stable chiral (acyloxy)borane (CAB) complex is prepared in situ by mixing a tartaric acid derivative and arylboronic acids at room temperature. A solution of the catalyst is effective in catalyzing hetero Diels-Alderreactions to produce dihydropyrone derivatives of high optical purities.
On the relationship of topological and diastereofacial control in the Lewis acid catalyzed cyclocondensation reaction of alkoxyaldehydes with activated dienes: metal tunable asymmetric induction
作者:Samuel J. Danishefsky、William H. Pearson、Daniel Harvey
DOI:10.1021/ja00320a051
日期:1984.4
On etudie les reactions de dienes du type methoxy-1 methyl-2 trimethylsiloxy-3 pentadiene-1,3 avec des aldehydoethers du type benzyloxy-2 butanal conduisant a des derives de pyrannone-4
在 etudie les 反应 de dienes du type methoxy-1methyl-2 trimethylsiloxy-3 pentadiene-1,3 avec des aldehydoethers du type benzyloxy-2 butanal conduisant a des衍生 de pyrannone-4
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
A stable chiral (acyloxy)borane (CAB) complex is prepared in situ by mixing tartaric acid derivative and arylboric acid at room temperature. A solution of the catalyst is effective to catalyze hetero Diels-Alder reaction to produce dihydropyrone derivatives of high optical purities.
Asymmetric hetero-Diels-Alder reaction catalyzed by a chiral organoaluminum reagent