Copper-Catalyzed Alkene Aminoazidation as a Rapid Entry to 1,2-Diamines and Installation of an Azide Reporter onto Azahetereocycles
作者:Kun Shen、Qiu Wang
DOI:10.1021/jacs.7b06852
日期:2017.9.20
A copper-catalyzed aminoazidation of unactivated alkenes is achieved for the synthesis of versatile unsymmetrical 1,2-diamine derivatives. This transformation offers an effective approach to installing an amide and an azide from two diffenent amino precursors onto both terminal and internal alkenes, with remarkable regio- and stereoselectivity. Mechanistic studies show that this diamination reaction
A copper-catalyzed direct aminosulfonylation of unactivated alkenes with sodiumsulfinates for the efficient synthesis of sulfonylated pyrrolidones is described. This reaction features good functional group tolerance and wide substrate scope, providing an efficient and straightforward protocol to access this kind of pyrrolidones. Moreover, preliminary mechanistic investigations disclosed that a free-radical
A visible-light metal-free photocatalytic synthesis of 3-position substituted 3,4-dihydroisoquinolin-1(2H)-one derivatives under mild conditions in moderate to good yields is described. EosinY Na, an organic dye, which is of low cost and has good availability, is used as the photocatalyst. A wide range of substrates are tolerated and the gram-scale reaction can also proceed smoothly. Mechanistic studies
CuX<sub>2</sub>-mediated oxybromination/aminochlorination of unsaturated amides: synthesis of iminolactones and lactams
作者:Zhi-Qiang Zhang、Feng Liu
DOI:10.1039/c5ob00520e
日期:——
We report herein a CuX2-mediated halocyclization of γ,δ-unsaturated amides for the synthesis of functionalized iminolactones and lactams respectively under mild reaction conditions. Mechanism studies indicated that N-attack cyclization was via a radical route while oxycyclization was via a nucleophilic attack on the activated CC bond.
The novel sunlight-promoted aerobic synthesis of selenated iminoisobenzofurans or isoindolinones via the regioselective and chemoselective O-cyclization or N-cyclization of olefinic amides and diselenides has been developed. Interestingly, the chemoselectivity is strongly dependent on the use of TFA as the catalyst or Na2CO3 as the base. This high efficiency and sustainable protocol performed well
硒化iminoisobenzofurans或异吲哚啉的新的太阳光促进的有氧合成通过区域选择性和化学选择性ö -cyclization或ñ烯酰胺和diselenides的-cyclization已经研制成功。有趣的是,化学选择性强烈依赖于使用TFA作为催化剂或使用Na 2 CO 3作为碱。这种高效且可持续的协议在环境空气和无金属条件下表现良好。此外,获得了一系列硒化亚氨基异苯并呋喃和异吲哚啉酮产品,收率中等至良好,具有良好的官能团耐受性和广泛的适用范围。