Reaction of 1,3-Bis(het)arylmonothio-1,3-diketones with Sodium Azide: Regioselective Synthesis of 3,5-Bis(het)arylisoxazoles via Intramolecular N–O Bond Formation

2020 ◽  
Vol 85 (23) ◽  
pp. 15422-15436
Author(s):  
Mary Antony P ◽  
Gantala L. Balaji ◽  
Pethaperumal Iniyavan ◽  
Hiriyakkanavar Ila
Keyword(s):  
Sodium Azide ◽  
Bond Formation ◽  
Regioselective Synthesis

Pd-catalysed general access to 7-membered N/O-heterocyclic compounds as potential agents against inflammation

2021 ◽  
Vol 57 (78) ◽  
pp. 10091-10094
Author(s):  
B. Thirupataiah ◽  
Gangireddy Sujeevan Reddy ◽  
Guntipally Mounika ◽  
Jetta Sandeep Kumar ◽  
Kazi Amirul Hossain ◽  
...  
Keyword(s):  
Heterocyclic Compounds ◽  
Bond Formation ◽  
Regioselective Synthesis

A Pd-catalysed regioselective synthesis of 4,5-disubstituted 7-membered N/O-heterocycles was achieved via the 7-endo-dig cyclization followed by C–C bond formation of 2-(1-alkynyl)phenylacetamide.

Iodine-mediated C–N and C–S bond formation: regioselective synthesis of benzo[4,5]imidazo[2,1-b]thiazoles

2017 ◽  
Vol 41 (1) ◽  
pp. 75-80 ◽  
Author(s):  
Sethurajan Ambethkar ◽  
Muthalu Vellimalai ◽  
Vediappen Padmini ◽  
Nattamai Bhuvanesh
Keyword(s):  
Reaction Time ◽  
Intramolecular Cyclization ◽  
Simple Procedure ◽  
Bond Formation ◽  
Molecular Iodine ◽  
Regioselective Synthesis ◽  
Thiazole Derivatives ◽  
Short Reaction Time ◽  
Metal Free

The regioselective synthesis of benzo[4,5]imidazo[2,1-b]thiazole derivatives via amination (C–N) and intramolecular cyclization (C–S) reactions in the presence of molecular iodine has been reported. This method is base and metal free and features inexpensive catalysts, with a simple procedure and a short reaction time.

Manganese(ii)-catalysed dehydrogenative annulation involving C–C bond formation: highly regioselective synthesis of quinolines

2019 ◽  
Vol 48 (14) ◽  
pp. 4474-4478 ◽  
Author(s):  
Chengniu Wang ◽  
Jinfei Yang ◽  
Xiao Meng ◽  
Yufeng Sun ◽  
Xuyan Man ◽  
...  
Keyword(s):  
Bond Formation ◽  
Regioselective Synthesis

An inexpensive nontoxic manganese(ii)-catalysed dehydrogenative annulation was developed for C–C bond formation.

Copper-Catalyzed Double C–N Bond Formation for the Synthesis of Diverse Benzimidazoles from N-Alkyl-2-iodoaniline and Sodium Azide

Synlett ◽  
2016 ◽  
Vol 28 (04) ◽  
pp. 504-508 ◽  
Author(s):  
Zhengkai Chen ◽  
Hongjun Ren ◽  
Hongli Li ◽  
Gangjian Cao ◽  
Jianfeng Xu ◽  
...  
Keyword(s):  
Sodium Azide ◽  
Bond Formation

Copper nanoparticles supported on charcoal mediated one-pot three-component synthesis of N-substituted-2H-indazoles via consecutive condensation C–N and N–N bond formation

2019 ◽  
Vol 97 (4) ◽  
pp. 303-309 ◽  
Author(s):  
Reza Khalifeh ◽  
Faranak Karimzadeh
Keyword(s):  
Copper Nanoparticles ◽  
Sodium Azide ◽  
Direct Synthesis ◽  
Bond Formation ◽  
Primary Amines ◽  
Title Reaction ◽  
One Pot

An efficient and straightforward protocol for direct synthesis of 2H-indazoles is achieved from consecutive condensation of 2-halobenzaldehydes, primary amines, and sodium azide catalyzed by heterogeneous copper nanoparticles on charcoal (Cu/C) is achieved. The recoverable heterogeneous copper nanoparticles on charcoal (Cu/C) catalyst exhibited an impressive activity for the title reaction without any additives (expensive ligands, etc.). A series of structurally diverse 2H-indazoles were prepared in good to excellent yields from easily accessible starting materials by employing this protocol.

Oxidative organophotoredox catalysis: a regioselective synthesis of 2-nitro substituted imidazopyridines and 3-substituted indoles, initiated by visible light

2016 ◽  
Vol 40 (11) ◽  
pp. 9694-9701 ◽  
Author(s):  
Snehlata Yadav ◽  
Madhulika Srivastava ◽  
Pratibha Rai ◽  
Bhartendu Pati Tripathi ◽  
Anu Mishra ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Room Temperature ◽  
Bond Formation ◽  
Light Irradiation ◽  
Regioselective Synthesis ◽  
Metal Free

Intramolecular C–N heterocyclization and C–C bond formation under visible light irradiation at room temperature was accomplished with a metal-free photoredox catalyst.

Regioselective Synthesis of Fused Imidazo[1,2-a]pyrimidines via Intramolecular C–N Bond Formation/6-Endo-Dig Cycloisomerization

2014 ◽  
Vol 79 (15) ◽  
pp. 6905-6912 ◽  
Author(s):  
Atul Kumar ◽  
Mukesh Kumar ◽  
Shivam Maurya ◽  
Ranjana S. Khanna
Keyword(s):  
Bond Formation ◽  
Regioselective Synthesis
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