An efficient and mild protocol for bromination of aryl azides with N-bromosuccinimide（NBS） under FeCl_3 catalysis in 1,2- dichloroethane was developed.It is proved to be an efficient method for obtaining brominated ...An efficient and mild protocol for bromination of aryl azides with N-bromosuccinimide（NBS） under FeCl_3 catalysis in 1,2- dichloroethane was developed.It is proved to be an efficient method for obtaining brominated aryl azides.展开更多
Owing to their inexpensive and environmentally friendly properties,iron-based catalysts have been actively investigated for new organic reactions.In this account,we summarized our recent results on iron-catalyzed cros...Owing to their inexpensive and environmentally friendly properties,iron-based catalysts have been actively investigated for new organic reactions.In this account,we summarized our recent results on iron-catalyzed cross-coupling reactions and homo-coupling reactions.With iron-based catalysts,we constructed diverse carbon-carbon bonds,i.e.,C(sp^2)-C(sp^3),C(sp^3)-C(sp^3),C(sp^3)-C(sp^2)and C(sp^2)-C(sp^2)bonds.In order to demonstrate the usefulness of our iron protocol,we also carried out these reactions on gram-scale reactions,leading to good yields.展开更多
α,β-Unsaturated primary amides are important intermediates and building blocks in organic synthesis.Herein,we report a ligand-free iron-catalyzed hydroaminocarbonylation of alkynes using NH_(4)HCO_(3)as the ammonia ...α,β-Unsaturated primary amides are important intermediates and building blocks in organic synthesis.Herein,we report a ligand-free iron-catalyzed hydroaminocarbonylation of alkynes using NH_(4)HCO_(3)as the ammonia source,enabling the highly efficient and regioselective synthesis of linearα,β-unsaturated primary amides.Various aromatic and aliphatic alkynes are transformed into the desired linearα,β-unsaturated primary amides in good to excellent yields.Further studies show that using NH_(4)HCO_(3)as the ammonia source is key to obtain good yields and selectivity.The utility of this route is demonstrated with the synthesis of linearα,β-unsaturated amides including vanilloid receptor-1 antagonist TRPV-1.展开更多
An iron-catalyzed strategy for the rapid synthesis of indolo[2,3-c]quinolines has been developed.This cascade reaction involving alcohol oxidation,nitro reduction,and oxidative annulation was achieved in a one-pot.The...An iron-catalyzed strategy for the rapid synthesis of indolo[2,3-c]quinolines has been developed.This cascade reaction involving alcohol oxidation,nitro reduction,and oxidative annulation was achieved in a one-pot.The present protocol was started from mono-functionalized indoles and readily available benzylic alcohols/aldehydes,affording a variety of functionalized indolo[2,3-c]quinolines in satisfactory yields.展开更多
基金supported by National Natural Science Foundation of China(No30873153)the Key Projects of Shanghai in Biomedical(No08431902700)the Scientific Research Foundation of State Education Ministry for the Returned Overseas Chinese Scholars
文摘An efficient and mild protocol for bromination of aryl azides with N-bromosuccinimide（NBS） under FeCl_3 catalysis in 1,2- dichloroethane was developed.It is proved to be an efficient method for obtaining brominated aryl azides.
基金financed by National Natural Science Foundation of China (Nos. 21672181, 21272199)GRF/RGC (Nos. 403012, CUHK14309216, CUHK14303815)+1 种基金grant to the State Key Laboratory of Synthetic Chemistry from the Innovation and Technology Commission, The Chinese Academy of Sciences-Croucher Foundation Funding Scheme for Joint LaboratoriesDirect Grant (No. 4053325) from The Chinese University of Hong Kong
文摘Owing to their inexpensive and environmentally friendly properties,iron-based catalysts have been actively investigated for new organic reactions.In this account,we summarized our recent results on iron-catalyzed cross-coupling reactions and homo-coupling reactions.With iron-based catalysts,we constructed diverse carbon-carbon bonds,i.e.,C(sp^2)-C(sp^3),C(sp^3)-C(sp^3),C(sp^3)-C(sp^2)and C(sp^2)-C(sp^2)bonds.In order to demonstrate the usefulness of our iron protocol,we also carried out these reactions on gram-scale reactions,leading to good yields.
基金financial supports from the National Natural Science Foundation of China(Nos.21772035,22022204,22072167,21202206)Natural Science Foundation of Hunan Province(Nos.2021JJ40147)。
文摘α,β-Unsaturated primary amides are important intermediates and building blocks in organic synthesis.Herein,we report a ligand-free iron-catalyzed hydroaminocarbonylation of alkynes using NH_(4)HCO_(3)as the ammonia source,enabling the highly efficient and regioselective synthesis of linearα,β-unsaturated primary amides.Various aromatic and aliphatic alkynes are transformed into the desired linearα,β-unsaturated primary amides in good to excellent yields.Further studies show that using NH_(4)HCO_(3)as the ammonia source is key to obtain good yields and selectivity.The utility of this route is demonstrated with the synthesis of linearα,β-unsaturated amides including vanilloid receptor-1 antagonist TRPV-1.
基金Financial support from the National Natural Science Foundation of China(Nos.21871226 and 21572194)the Hunan Provincial Natural Science Foundation of China(No.2020JJ5531)+1 种基金the Open Fund of Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates,Guangzhou 510640,China(South China University of Technology)(No.2019B030301003)the Undergraduate Investigated Study and Innovated Experiment Plan from Ministry of Education of China and Hunan Province is gratefully acknowledged.
文摘An iron-catalyzed strategy for the rapid synthesis of indolo[2,3-c]quinolines has been developed.This cascade reaction involving alcohol oxidation,nitro reduction,and oxidative annulation was achieved in a one-pot.The present protocol was started from mono-functionalized indoles and readily available benzylic alcohols/aldehydes,affording a variety of functionalized indolo[2,3-c]quinolines in satisfactory yields.
