Synthesis of
<i>gem</i>
‐Difluoro Olefins through C−H Functionalization and β‐fluoride Elimination Reactions
作者:Zhen Yang、Mieke Möller、Rene M. Koenigs
DOI:10.1002/anie.201915500
日期:2020.3.27
reported. This approach provides for the first time a facile method for the rapid synthesis of gem-difluoro olefins using fluorinated diazoalkanes under mild reaction conditions. Cyclopropanation products were obtained when N-arylated rather than N-alkylated indoles were applied in this reaction. Mechanistic studies reveal the importance of the β-fluoride elimination step in this transformation. This method
Cannabinoid analogues that exhibit specificity for the CB
2
cannabinoid receptor are provided. The analogues are 1-methoxy-, 1-deoxy-11-hydroxy- and 11-hydroxy-1-methoxy-Δ
8
-tetrahydrocannabinols and 1-alkyl-3(1-naphthoyl)indoles. The compounds are useful for the treatment of pain (especially pain resulting from inflammation) and cancer (especially glioma tumors).
Described here is the first example of solvent-promoted catalyst-free N-incorporation multicomponent domino reaction for the direct construction of novel π-extension [60]fullerene-fused dihydrocarbolines from simple hydrocarbons. This unprecedented transformation is proposed to proceed by a sequential N-incorporation/[4+2] cycloaddition/elimination process, involving multiple types of bond cleavage and formation
Efficient thiocyanation of aromatic compounds using NH4SCN, DMSO and H2SO4
作者:Mohammad Abbasi、Najmeh Nowrouzi、Hamed Sedaghat
DOI:10.1016/j.tetlet.2022.153929
日期:2022.7
A simple, efficient, and smooth thiocyanation of indoles, phenols and aniline derivatives using NH4SCN, DMSO and H2SO4 in DMF is introduced. Using this procedure, diverse indoles and N-alkyl indoles are selectively thiocyanated at the C-3 position. para-free anilines, N-alkyl anilines and phenols undergo thiocyanation at the para position selectively.
介绍了在 DMF 中使用 NH 4 SCN、DMSO 和 H 2 SO 4对吲哚、苯酚和苯胺衍生物进行简单、高效、平稳的硫氰化反应。使用该程序,多种吲哚和N-烷基吲哚在 C-3 位被选择性硫氰化。无对位苯胺、N-烷基苯胺和苯酚在对位选择性地进行硫氰化。