Base‐Promoted Michael Addition/Smiles Rearrangement/
<i>N</i>
‐Arylation Cascade: One‐Step Synthesis of 1,2,3‐Trisubstituted 4‐Quinolones from Ynones and Sulfonamides
作者:Jing Liu、Dan Ba、Weiwei Lv、Yanhui Chen、Zemin Zhao、Guolin Cheng
DOI:10.1002/adsc.201900960
日期:2020.1.7
synthesize 1,2,3‐trisubstituted 4‐quinolones from readily available ynones and sulfonamides was developed. The construction of one C−C bond and two C−N bonds via cleavage of one N−S, one C−S, and one C−X (X=F, Cl, Br, O) bond is achieved under transition‐metal‐free conditions in one step. This transformation generates 1 equiv. of sulfur dioxide and 1 equiv. of hydrogen halide as the byproducts. The broad substrate
已开发了一种通用,实用且环保的方案,可以从容易获得的炔酮和磺酰胺中合成1,2,3-三取代的4-喹诺酮。在过渡金属的作用下,通过裂解一个N-S,一个C-S和一个C-X(X = F,Cl,Br,O)键,可以构建一个C-C键和两个C-N键。一步就能达到无条件。此变换生成1个当量。二氧化硫和1当量 卤化氢作为副产物。1,2,3-三取代的4-喹诺酮类化合物的52个实例证明了广泛的底物范围和官能团耐受性。初步的机理研究支持顺序的迈克尔加成/微笑重排/ N芳基化反应途径。