Iodine-Promoted C(sp
2)–H Thiolation of Maleimides with Dimethyl Sulfoxide and Thiols
作者:Sheng-Yin Zhao、Hong-Ru Tan、Lun Wang、Jia-Nan Zhu、Zhen-Hua Yang
DOI:10.1055/s-0037-1609585
日期:2018.10
Iodine-promoted C(sp 2)–H methylthiolation of maleimides using DMSO as synthon has been developed to afford 3-methylthiomaleimides in moderate yields under metal-free conditions. In addition, 3-thiomaleimides were synthesized from maleimides and thiols in the presence of iodine and triethylamine. The methods are simple and efficient for the formation of C–Sbond. Iodine-promoted C(sp 2)–H methylthiolation
BF3-OEt2 Catalyzed C3-Alkylation of Indole: Synthesis of Indolylsuccinimidesand Their Cytotoxicity Studies
作者:Iqbal N. Shaikh、Abdul Rahim、Shaikh Faazil、Syed Farooq Adil、Mohamed E. Assal、Mohammad Rafe Hatshan
DOI:10.3390/molecules26082202
日期:——
amongst the series with IC50 value 0.02 µM and 0.8 µM against HT-29 and Hepg2 cell lines, respectively, and compound 3i was most active amongst the series with IC50 value 1.5 µM against A549 cells. Molecular docking study and mechanism of reaction have briefly beendiscussed. This method is better than previous reports in view of yield and substrate scope including electron deficient indoles.
HFIP-promoted Michael reactions: direct <i>para</i>-selective C–H activation of anilines with maleimides
作者:Bang Li、Qi Mao、Jia Zhou、Feng Liu、Na Ye
DOI:10.1039/c8ob03073a
日期:——
The Michael reaction is widely used for the C–C coupling of electron-poor olefins and C(sp3)–H pronucleophiles. Herein, an effective Michael reaction approach between electron-rich aromatic and heteroaromatic substrates as C(sp2)–H nucleophiles with maleimides as electrophiles in 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) was first presented without the need for any additional metal catalysts or reagents
Direct Synthesis of Fused Thienoindoles via Base Promoted Double C−H Sulfuration with Elemental Sulfur
作者:Shanping Chen、Kai Hu、Wei Feng、Guojiang Mao、Yuxia Li、Guo‐Jun Deng
DOI:10.1002/adsc.202300443
日期:2023.6.13
indoles and elemental sulfur has been reported. The present approach produces a range of structurally valuable fused thienoindoles in 51–78% yield under transition-metal-free conditions, which may have potential applications in pharmaceutical industry and organic functional materials. In this work, the double C−S bonds formation is achieved via base promoted direct sulfuration of C−H bonds with elemental