Catalytic Asymmetric Transfer Hydrogenation of <i>trans</i>-Chalcone Derivatives Using BINOL-derived Boro-phosphates
作者:Fei Na、Susana S. Lopez、Alice Beauseigneur、Lucas W. Hernandez、Zhuoxin Sun、Jon C. Antilla
DOI:10.1021/acs.orglett.0c02042
日期:2020.8.7
Chiral phosphoric-acid-catalyzed asymmetric reductions of trans-chalcones have been investigated in this work. A BINOL-derived boro-phosphate-catalyzed asymmetric transfer hydrogenation of the carbon–carbon double bond of trans-chalcone derivatives employing borane as a hydride source was realized. This methodology provides a convenient procedure to accesschiral dihydrochalone derivatives in high
Pd-Catalyzed Asymmetric Hydrogenation of C=C Bond of α,β-Unsaturated Ketones
作者:Yong-Gui Zhou、Duo-Sheng Wang、Da-Wei Wang
DOI:10.1055/s-0030-1259725
日期:2011.4
Homogenous palladium-catalyzed asymmetric hydrogenation of C=C double bond of alpha,beta-unsaturated ketones has been developed by using palladium(II) trifluoroacetate/(S)-7,7'-bis[ di(4-methoxyphenyl]phosphino)-1,1'-spirobiindane complex [Pd(OCOCF(3))(2)-(S)-An-SDP] as the catalyst under ambient hydrogen pressure and room temperature with up to 89% ee.
使用钯 (II) 三氟乙酸酯/(S)-7,7'-双[二(4-甲氧基苯基]膦基)-开发了均相钯催化的α,β-不饱和酮的C=C双键不对称氢化1,1'-spirobiindane 络合物 [Pd(OCOCF(3))(2)-(S)-An-SDP] 作为催化剂,在环境氢气压力和室温下具有高达 89% 的 ee。
Catalytic asymmetric construction of tetrasubstituted carbon stereocenters by conjugate addition of dialkyl phosphine oxides to β,β-disubstituted α,β-unsaturated carbonyl compounds
作者:Depeng Zhao、Lijuan Mao、Linqing Wang、Dongxu Yang、Rui Wang
DOI:10.1039/c1cc16079f
日期:——
The catalytic asymmetric phospha-Michael reaction of dialkyl phosphine oxides with beta,beta-disubstituted alpha,beta-unsaturated carbonyl compounds was achieved. The products bearing tetrasubstituted carbon stereocenters were obtained in high yields with excellent enantioselectivities (up to >99% ee).
Al and friends: Asymmetricconjugateaddition of Me3Al to β,β‐disubstituted α,β‐unsaturated ketones in the presence copper and L1 leads to a highly efficient construction of an all‐carbon‐substituted chiral quaternarycenter. This result is the first example of an asymmetricconjugateaddition of Me3Al to acyclic enones to give a chiral quaternary carbon center with excellent yield and enantioselectivity
Direct Site-Specific and Highly Enantioselective γ-Functionalization of Linear α,β-Unsaturated Ketones: Bifunctional Catalytic Strategy
作者:Dongxu Yang、Linqing Wang、Fengxia Han、Depeng Zhao、Bangzhi Zhang、Rui Wang
DOI:10.1002/anie.201301146
日期:2013.6.24
α, β, γ: The title method employs a Mg/L catalyst, which is well suited for the selective γ deprotonation and activation of linearα,β‐unsaturated ketones for reaction with nitroalkenes. The reaction leads to a series of optically active cyclohexene ring systems bearing multiple functional groups, systems which are not easily accessible using other methodologies.