使用HCO 2 H / Et 3 N混合物作为氢源和定义明确的手性Rh催化剂(S,S)-或(R,R)-2,对环状氨基磺酸亚胺4和9进行不对称转移氢化(ATH), Cp * RhCl(TsDPEN)可在室温下0.5h内以优异的收率和对映选择性有效生产相应的环状氨基磺酸酯。具有预先存在的立体生成中心的4,5-二取代的亚胺9的ATH显示以动态动力学拆分发生。
Enantioselective Synthesis of Cyclic Sulfamidates by Using Chiral Rhodium-Catalyzed Asymmetric Transfer Hydrogenation
作者:Soyeong Kang、Juae Han、Eun Sil Lee、Eun Bok Choi、Hyeon-Kyu Lee
DOI:10.1021/ol1017905
日期:2010.9.17
Asymmetric transfer hydrogenation (ATH) of cyclic sulfamidate imines 4 and 9, using a HCO2H/Et3N mixture as the hydrogen source and well-defined chiral Rh catalysts (S,S)- or (R,R)-2, Cp*RhCl(TsDPEN), effectively produces the corresponding cyclic sulfamidates with excellent yields and enantioselectivities at room temperature within 0.5 h. ATH of 4,5-disubstituted imines 9, having preexisting stereogenic
使用HCO 2 H / Et 3 N混合物作为氢源和定义明确的手性Rh催化剂(S,S)-或(R,R)-2,对环状氨基磺酸亚胺4和9进行不对称转移氢化(ATH), Cp * RhCl(TsDPEN)可在室温下0.5h内以优异的收率和对映选择性有效生产相应的环状氨基磺酸酯。具有预先存在的立体生成中心的4,5-二取代的亚胺9的ATH显示以动态动力学拆分发生。
Enantioselective Synthesis of Cyclic Sulfamidates via Pd-Catalyzed Hydrogenation
Using Pd(CF3CO2)(2)/(SS)-f-binaphane as the catalyst, an efficient enantioselective synthesis of cyclic sulfamidates was developed via asymmetric hydrogenation of the corresponding cyclic imines in 2,2,2-trifluoroethanol at room temperature with high enantioselectivities (up to 99% ee).
Highly enantioselective synthesis of cyclic sulfamidates and sulfamidesviarhodium-catalyzed transfer hydrogenation
作者:Sun Ah Lee、Se Hun Kwak、Kee-In Lee
DOI:10.1039/c0cc04166a
日期:——
We achieved highly enantioselective synthesis of cyclic 1,2-sulfamidates and -sulfamides viarhodium-catalyzed transfer hydrogenation, and also revealed one-pot preparation of cyclic N-sulfonylimines from α-hydroxy ketones.
Enantioselective Rhodium-Catalyzed Arylation of Cyclic <i>N</i>-Sulfamidate Alkylketimines: A New Access to Chiral β-Alkyl-β-aryl Amino Alcohols
作者:Ya-Jing Chen、Ya-Heng Chen、Chen-Guo Feng、Guo-Qiang Lin
DOI:10.1021/ol501464e
日期:2014.6.20
The enantioselectiverhodium-catalyzed1,2-addition of arylboronates to cyclic N-sulfamidate alkylketimines was developed. With a rhodium/diene complex as catalyst, high enantioselectivity and broad functional group tolerance were observed. The resulting sulfamidates can easily be converted into chiral β-alkyl-β-aryl amino alcohols.