Results 51 to 60 of about 81,920,088 (159)

One-pot synthesis of imidazo[1,2-α]pyridine thioethers using imidazo[1,2-α]pyridines, arylsulfonyl chlorides and hydrazine

Phosphorus, Sulfur, and Silicon and the Related Elements, 2019
A one-pot reaction of making RS-substituted imidazo[1,2-α]pyridine derivatives by directly using aryl or alkylsulfonyl chloride and hydrazine was developed, selectively giving good yields of the expected products. Compared with previously reported methods of using ArSO2NHNH2 as a sulfur source, this method is much cheaper, more practical and convenient
Jin Wang, Jie Zhu, Aihua Zhou
openaire   +1 more source

Synthesis of imidazo[1,2-a] pyridines and imidazo[1,2-b] pyridazines tricyclic derivatives

, 2009
Les motifs imidazo[1,2-a]pyridines et imidazo[1,2-b]pyridazines sont des noyaux très étudiés par la communauté scientifique, notamment dans le domaine thérapeutique.
Oudot, Romain
core  

I₂-Catalyzed intramolecular dehydrogenative aminooxygenation of alkynes to acylated imidazo[1,2-a]pyridines and indolizines

, 2018
An efficient and green protocol for the construction of acylated imidazo[1,2-a]pyridines and indolizines via intramolecular dehydrogenative aminooxygenation of alkynes has been developed.
Yimiao He, Wenqing Yin, Chusheng Huang, Jianrong Huang, Chunfang Gan, Jian Wang, Fang Yang, Xinru Pang   +7 more
core   +1 more source

Iodobenzene-catalyzed synthesis of Imidazo 1,2-a pyridines from aryl ketones with mCPBA in ionic liquid

, 2010
[[abstract]]Iodobenzene-catalyzed synthesis of imidazo[1,2-a]pyridines from aryl ketones with mCPBA as a cooxidant in ionic liquid is described The method is simple, rapid and practical, generating Imidazo[1,2-a]pyridines from the aryl ketone without ...
Chang, YL;Wang, HM;Hou, RS;Kang, IJ;Chen, LC
core  

Tandem Flavin-Iodine-Catalyzed Aerobic Oxidative Sulfenylation of Imidazo[1,2-a]Pyridines with Thiols

A green, aerobic sulfenylation of imidazo[ 1,2-a]pyridines was performed using thiols, a flavinand- iodine dual catalytic system, and environmentally benign molecular oxygen as the only sacrificial reagent.
Ohkado, Ryoma, Iida, Hiroki, Demizu, Ryuta   +2 more
core   +1 more source

2-Aryl-3-Vinyl Substituted Imidazo[1,2-a]pyridines and fluorescent electrocyclization derivatives therefrom

, 2020
A collection of 2-aryl-3-vinylimidazo[1,2-a]pyridines, substituted on the pyridine ring and/or the aryl substituent, can be obtained by reaction of 2-aminopyridines with properly substituted nitrobutadienes, originated by an initial ring opening of a ...
Tavani C., Petrillo G., Bianchi L., Benzi A., Giorgi G., Maccagno M.   +5 more
core   +1 more source

Transition-metal-free synthesis of triarylmethanes via Friedel-Crafts reactions of imidazo[1,2-a]pyridines with chlorohydrocarbon derivatives

A facile, transition-metal-free, HFIP-promoted method for the synthesis of triarylmethanes through direct Friedel-Crafts reactions of imidazo[1,2-a]pyridines with chlorohydrocarbon derivatives has been described, which allows for efficient synthesis of ...
Kai Yang, Xiaohua Guo, Xinlei Fu, Zhaowen Liu, Longhui Wu   +4 more
core   +1 more source

Synthesis of imidazo 1,2-a pyridines from unactivated 2-alkyl-4,5-dihydroimidazoles through conjugate N-addition

, 2000
2-Alkyl-4,5-dihydroimidazoles undergo annulation with alpha,beta-unsaturated aldehydes and ketones via conjugate addition of the N-1 nitrogen atom and subsequent enamine-aldol condensation of C(alpha) to form imidazo[1,2-a]pyridines having reversed ...
Light, M.E., Hursthouse, M.B., Jones, R.C.F., Coles, S.C., Dimopoulos, P.   +4 more
core  

Heterocyclization of Functionalized Vinylic Derivatives of Imidazo[1,2-a]pyridines

, 2016
Heterocyclization of functionalized vinylic derivatives of imidazo[1,2-a]pyridines was explored experimentally and theoretically using semiempirical AM1 and ab initio methods.
Jean M. Chezal (3030081), Alain Gueiffier (545039), Gregory Delmas (3030084), Emmanuel Moreau (1278759), Gérard Grassy (3030078), Claire Lartigue (2427409), Yves Blache (2153359), Olivier Chavignon (1811659), Jean C. Teulade (3030075)   +8 more
core   +2 more sources

Diethylaminosulfur Trifluoride: A Novel, Low-Cost, Stable Double Thiolation Reagent for Imidazo[1,2-α]pyridines. [PDF]

ACS Omega, 2021
Jiang H, Shen H, Zhu S, Wang B, Yang Y, Nong Z, Yi M, Tang S, Gui QW.   +8 more
europepmc   +1 more source