Tertiary Amine-Triggered Cascade S<sub>N</sub>2/Cycloaddition: An Efficient Construction of Complex Azaheterocycles under Mild Conditions
作者:Jian Hu、Bing Tian、Xinyan Wu、Xiaofeng Tong
DOI:10.1021/ol302329b
日期:2012.10.5
In this paper, an amine-triggeredcascade SN2/cycloaddtion sequence between 2-(acetoxymethyl)buta-2,3-dienoate 1 and various π-system functionalized tosylamides 3 has been reported, which provides a facile method for stereoselective construction of structurally diverse azaheterocycles.
在本文中,已经报道了在2-(乙酰氧基甲基)丁2,3-二烯酸酯1和各种π-系统官能化的甲苯磺酰胺3之间的胺触发级联S N 2 /环加成序列,为立体选择性构建Sn 2提供了一种简便的方法。结构上不同的氮杂杂环。
Manganese-Catalyzed Achmatowicz Rearrangement Using Green Oxidant H<sub>2</sub>O<sub>2</sub>
catalytic methods for the oxidative furan-recyclizations remain scarcely investigated. Given this, we report a means of manganese-catalyzed oxidations of furan with low loading, achieving the Achmatowiczrearrangement in the presence of hydrogen peroxide as an environmentally benign oxidant under mild conditions with wide functional group compatibility.
Alkylation of Sulfonamides with Trichloroacetimidates under Thermal Conditions
作者:Daniel R. Wallach、John D. Chisholm
DOI:10.1021/acs.joc.6b01421
日期:2016.9.2
with trichloroacetimidates is reported. This transformation does not require an exogenous acid, base, or transition metal catalyst; instead the addition occurs in refluxing toluene without additives. The sulfonamide alkylation partner appears to be only limited by sterics, with unsubstituted sulfonamides providing better yields than more encumbered N-alkyl sulfonamides. The trichloroacetimidate alkylating
An efficient preparation of optically active α-furfuryl amide by kinetic resolution using the modified sharpless asymmetric epoxidation reagents
作者:Wei-Shan Zhou、Zhi-Hui Lu、Zhi-Min Wang
DOI:10.1016/s0040-4020(01)86343-2
日期:1993.3
Kineticresolution of α-furfuryl amide was first carried out by using the modified Sharpless asymmetric epoxidation reagent to give the slow-reacting enantiomers, (S)-1a–h and (R)-1b,f in high enantioselectivity(90–100% e.e) and high chemical yield (45–50%). Similar results were obtained from the fast-reacting enantiomers. This kineticresolution exhibits the reversed enantioselectivity.
An efficient preparation of optically active α-furfuryl amide by kinetic resolution using the modified sharpless asymmetric epoxidation reagent
作者:Wei-Shan Zhou、Zhi-Hui Lu、Zhi-Min Wang
DOI:10.1016/0040-4039(91)80360-i
日期:1991.3
Kineticresolution of α-furfuryl amide was first carried out by using the modified Sharpless asymmetric epoxidation reagent to give the slow-reacting enantiomers, (S)-1a–f and (R)-1b,f in high enantioselectivity (90–100% e.e) and high chemical yield (45–50%).