Simple Tandem Olefin Isomerization/Intramolecular Hydroamination of Alkenyl Amines with Various Allylic Tethers
作者:Young Ho Kim、Dong Bin Kim、So Won Youn
DOI:10.1021/acs.joc.2c01640
日期:2022.9.2
A simple and efficient AgOTf-promoted tandem olefin isomerization/intramolecular hydroamination of 1,1-disubstituted alkenyl amines has been developed. This one-pot process represents a facile and attractive route for the synthesis of diverse 2-alkyl-substituted 1,3-X,N-heterocycles through chemo- and regioselective C(sp3)–N bondformation with atom economy. Advantages such as the operationally simple
Tandem Reduction, Ammonolysis, Condensation, and Deamination Reaction for Synthesis of Benzothiadiazines and 1-(Phenylsulfonyl)-1<i>H</i>-benzimidazoles
A novel route for a SnCl2-promoted tandem reduction, ammonolysis, condensation, and deamination reaction which uses nitrile and 2-nitro-N-phenylbenzenesulfonamide/N-(2-nitrophenyl)benzenesulfonamide to synthesize derivatives of benzothiadiazine/1-(phenylsulfonyl)-1H-benzimidazole has been developed. The method features convenient operation and good functional group tolerance. In addition, it employs
SnCl 2促进串联还原、氨解、缩合和脱氨反应的新路线以腈和2-硝基-N-苯基苯磺酰胺/ N- (2-硝基苯基)苯磺酰胺合成苯并噻二嗪/1-(苯磺酰基)衍生物开发了-1H-苯并咪唑。该方法操作方便,官能团耐受性好。此外,它采用不敏感且廉价的 SnCl 2 / i -PrOH 作为反应试剂,为合成重要的药学靶标提供了直接途径。
Photochemical Nitration of Protected Anilines by
<scp>5‐Methyl</scp>
‐1,4‐dinitroimidazole
作者:Xinlong Fan、Yue Zhao、Lei Liu、Huan Wang
DOI:10.1002/cjoc.202200725
日期:——
and dyes. Nitration methods for anilines under mild conditions are highly desired. Herein, we report a photochemical method for the nitration of anilines bearing various protecting groups by 5-methyl-1,4-dinitroimidazole as a new type of nitro source. This method is light-controlled and proceeds under mild reaction conditions with high efficiency. Fmoc-, Ts- and alkyl-protected anilines are all well