The enantioselective construction of axially chiral compounds by electrophilic carbothiolation of alkynes is disclosed for the first time. This enantioselective transformation is enabled by the use of a Ts-protected bifunctional sulfide catalyst and Ms-protected ortho-alkynylaryl amines (Ts=tosyl; Ms=mesyl). Both electrophilic arylthiolating and electrophilic trifluoromethylthiolating reagents are
首次公开了通过炔的亲电碳硫基化对轴向手性化合物的对映选择性结构。通过使用Ts保护的双官能硫化物催化剂和Ms保护的邻炔基芳基胺(Ts =甲苯磺酰基; Ms =甲磺酰基),可以实现这种对映选择性转化。亲电芳基硫醇化试剂和亲电三氟甲基硫醇化试剂均适用于该反应。轴向手性乙烯基-芳基氨基硫化物的所得产物可以容易地转化为联芳基氨基硫化物,联芳基氨基亚砜,联芳基胺,乙烯基芳基胺和其他有价值的双官能化化合物。
Metal‐Free Synthesis of Selenodihydronaphthalenes by Selenoxide‐Mediated Electrophilic Cyclization of Alkynes
作者:Shaoyu An、Zhong Zhang、Pingfan Li
DOI:10.1002/ejoc.202100423
日期:2021.6.7
A metal-free, one-pot selenium mediated electrophiliccyclization reaction of alkynes and triflic anhydride-activated selenoxides was realized, giving selenium containing dihydronaphthalene products, including selenium-substituted phenanthrene, dihydroquinoline, 2H-chromene, and coumarin.
Gold-catalyzed annulations of allenes with N-hydroxyanilines to form indole derivatives with benzaldehyde as a promoter
作者:Rahul Kisan Kawade、Po-Han Huang、Somnath Narayan Karad、Rai-Shung Liu
DOI:10.1039/c3ob42131g
日期:——
Gold-catalyzed syntheses of 2,3-disubstituted indole derivatives from N-hydroxyanilines and allenes are described; these reactions require benzaldehyde as an additive to generate nitrones in situ. Our control experiments indicate that nitrones and water were indispensable in the reactions whereas N-hydroxyanilines alone were inactive nucleophiles. This synthetic method is compatible with allenes and
Sulfur-Mediated Electrophilic Cyclization of Aryl-Substituted Internal Alkynes
作者:Zhong Zhang、Pan He、Hongguang Du、Jiaxi Xu、Pingfan Li
DOI:10.1021/acs.joc.9b00136
日期:2019.4.5
A sulfur-mediated electrophiliccyclization reaction of aryl-tethered internal alkynes has been developed. Triflic anhydride-activated sulfoxides induced the electrophiliccyclization and then demethylation with triethylamine in one pot, affording 3-sulfenyl-1,2-dihydronaphthalenes and related types of products in yields of ≤96%.
The invention relates to compounds of Formula (I). Compounds of the present invention are inhibitors of sphingosine kinase 3, and are useful in the treatment of various disorders and conditions, such as inflammatory disorders.