Recoverable Chiral Sulfoxide: Asymmetric Diels–Alder Reaction Using Optically Active 1-(2-p-Tolylsulfinyl)pyrrolylα,β-Unsaturated Ketones as a Dienophile
Recoverable Chiral Sulfoxide: Asymmetric Diels–Alder Reaction Using Optically Active 1-(2-p-Tolylsulfinyl)pyrrolylα,β-Unsaturated Ketones as a Dienophile
Scalable and Highly Diastereo- and Enantioselective Catalytic Diels–Alder Reaction of α,β-Unsaturated Methyl Esters
作者:Tim Gatzenmeier、Mathias Turberg、Diana Yepes、Youwei Xie、Frank Neese、Giovanni Bistoni、Benjamin List
DOI:10.1021/jacs.8b07092
日期:2018.10.10
Despite tremendous advances in enantioselective catalysis of the Diels-Alder reaction, the use of simple α,β-unsaturated esters, one of the most abundant and useful class of dienophiles, is still severely limited in scope due to their low reactivity. We report here a catalytic asymmetric Diels-Alder methodology for a large variety of α,β-unsaturated methyl esters and different dienes based on extremely
Fe-BPsalan Complex-Catalyzed Asymmetric [4 + 2] Cycloaddition of Cyclopentadiene with α,β-Unsaturated Heterocycles
作者:Kai-Ge Chen、Hao Lu、Yi-Ming Zhou、Xiao-Long Wan、Hao-Yang Wang、Zhen-Jiang Xu、Hai-Ming Guo、Chi-Ming Che
DOI:10.1021/acs.joc.1c02798
日期:2022.7.1
An efficient iron-catalyzed asymmetric [4 + 2] cycloaddition of cyclopentadiene with α,β-unsaturated acyl imidazoles or 2-cinnamoylisoindoline-1,3-dione derivatives was developed to afford the addition products in high yield and selectivity. Interestingly, the absolute structures of the addition products were controlled by the auxiliaries via different coordination modes with the same type of catalyst