Reduction of conjugated nitroalkenes with zinc borohydride. A mild method for converting monosubstituted nitroalkenes to nitroalkanes and disubstituted ones to oximes
作者:Brindaban C. Ranu、Rupak Chakraborty
DOI:10.1016/s0040-4020(01)89028-1
日期:——
Mono-β-substituted conjugatednitroalkenes are readily reduced by zinc borohydride in 1,2-dimethoxyethane to the corresponding nitroalkanes, whereas the disubstituted ones furnish the corresponding oximes in excellent yields.
Highly selective reduction of conjugated nitroalkenes with zinc borohydride in DME
作者:Brindaban C. Ranu、Rupak Chakraborty
DOI:10.1016/0040-4039(91)80839-x
日期:1991.7
Zinc borohydride in 1,2-dimethoxvethane reduces α-substituted conjugated nitroalkenes to the corresponding oximes and non-α-substituted ones to the corresponding nitroalkanes in excellent yields.
An efficient [3+2] cycloaddition for the synthesis of substituted pyrazolo[1,5-c]quinazolines
作者:Tao Wang、Ailong Shao、Haiyan Feng、Shuwu Yang、Meng Gao、Jun Tian、Aiwen Lei
DOI:10.1016/j.tet.2015.03.019
日期:2015.7
and efficient [3+2] cycloaddition reaction between N-iminoquinazolinium ylide and nitroolefins was developed. From a synthetic point of view, this protocol represents an efficient way to pyrazolo[1,5-c]quinazolines derivatives.
开发了N-亚氨基喹唑啉鎓叶立德和硝基烯烃之间简单有效的[3 + 2]环加成反应。从综合的观点来看,该方案代表了吡唑并[1,5- c ]喹唑啉衍生物的有效方法。
Synthesis of Tetrasubstituted NH Pyrroles and Polysubstituted Furans via an Addition and Cyclization Strategy
作者:Zheng-Hui Guan、Liang Li、Mi-Na Zhao、Zhi-Hui Ren、Jianli Li
DOI:10.1055/s-0031-1289993
日期:2012.2
enamino esters with nitroolefins provides a straightforward and general method for the synthesis of tetrasubstituted NH pyrroles. This novel method tolerates a wide range of functionality, and allows for rapid elaboration of the nitroolefins into a variety of substituted pyrroles in good yields. Further, an efficient KOAc-promoted addition and cyclization protocol toward substituted furans has been