The Pd-catalysed asymmetric allylic alkylation reactions of sulfamidate imines
作者:Quoc Hoang Pham、Andrew J. Tague、Christopher Richardson、Christopher J. T. Hyland、Stephen G. Pyne
DOI:10.1039/d1sc03268b
日期:——
The Pd-catalysed asymmetricallylicalkylation (Pd-AAA) of prochiral enamide anions derived from 5H-oxathiazole 2,2-dioxides has been developed. Various 4,5-disubstituted and 4-substituted cyclic sulfamidate imines have participated in the transformation with a range of allyl carbonates—as well as 2-vinyl oxirane, 2-vinyl-N-tosylaziridine, and 2-vinyl-1,1-cyclopropane dicarboxylate—to furnish the desired
Metal- and Solvent-Free Approach to Diversely Substituted Picolinates via Domino Reaction of Cyclic Sulfamidate Imines with β,γ-Unsaturated α-Ketocarbonyls
An efficient, solvent-free, and eco-friendly domino reaction of 5/6-membered cyclic sulfamidate imines with a variety of β,γ-unsaturated α-ketocarbonyls in neat conditions under MW irradiation promoted by DABCO as a solid organobase has been developed for the rapid construction of a novel class of densely functionalized picolinates. This interesting metal–solvent-free tactic allows a wide range of
在DABCO促进的MW辐射下,在纯净条件下,开发了5/6元环状氨基磺酸亚胺与各种β,γ-不饱和α-酮羰基化合物的高效,无溶剂,生态友好的多米诺反应,该反应是由DABCO促进的,作为固体有机碱用于快速构建新型的高密度官能化的吡啶甲酸类化合物。这种有趣的无金属溶剂策略可在芳基环上提供多种有用的功能,并能在较短的时间间隔(20-40分钟)内,将上述氮杂杂环化合物的收率很好地提高。通过我们独特的方法成功合成了具有生物学前途的咪唑并[1,2- a ]吡啶。
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。