Catalyst‐free one‐pot regioselective synthesis of benzo[ d ]imidazo[2,1‐ b ]thiazoles by heating or grinding

2019 ◽  
Vol 56 (11) ◽  
pp. 3055-3064 ◽  
Author(s):  
Kalawati Meena ◽  
Mohit Saroha ◽  
Ishani Khurana ◽  
Amita Malik ◽  
Pramod K. Rai ◽  
...  
Keyword(s):  
Regioselective Synthesis ◽  
One Pot ◽  
Catalyst Free

A metal catalyst-free and one-pot synthesis of (3,4-dihydro-2H-benzo[b][1,4]oxazin-2-yl)methanol derivatives in water

RSC Advances ◽  
2015 ◽  
Vol 5 (103) ◽  
pp. 84889-84893 ◽  
Author(s):  
Shambhu Nath Singh ◽  
Sarva Jayaprakash ◽  
K. Venkateshwara Reddy ◽  
Ali Nakhi ◽  
Manojit Pal
Keyword(s):  
Regioselective Synthesis ◽  
Metal Catalyst ◽  
One Pot ◽  
Catalyst Free ◽  
One Pot Synthesis

Regioselective synthesis of (3,4-dihydro-2H-benzo[b][1,4]oxazin-2-yl)methanols have been accomplished via a greener method.

Metal-Free Photoinduced Hydroalkylation Cascade Enabled by an Electron-Donor-Acceptor Complex

2020 ◽  
Author(s):  
José Tiago Menezes Correia ◽  
Gustavo Piva da Silva ◽  
Camila Menezes Kisukuri ◽  
Elias André ◽  
Bruno Pires ◽  
...  
Keyword(s):  
Electron Donor ◽  
Functional Group ◽  
Photoexcited Electron ◽  
One Pot ◽  
Quaternary Centers ◽  
Metal Free ◽  
Acceptor Complex ◽  
Catalyst Free ◽  
Donor Acceptor ◽  
Radical Cascade

A metal- and catalyst-free photoinduced radical cascade hydroalkylation of 1,7-enynes has been disclosed. The process is triggered by a SET event involving a photoexcited electron-donor-aceptor complex between NHPI ester and Hantzsch ester, which decomposes to afford a tertiary radical that is readily trapped by the enyne. <a>The method provides an operationally simple, robust and step-economical approach to the construction of diversely functionalized dihydroquinolinones bearing quaternary-centers. A sequential one-pot hydroalkylation-isomerization approach is also allowed giving access to a family of quinolinones. A wide substrate scope and high functional group tolerance was observed in both approaches</a>.

Novel One-pot Synthesis of Pyranocarbazole Derivatives via an Isocyanide-based Three-component Reaction

2020 ◽  
Vol 17 ◽  
Author(s):  
Visarapu Malathi ◽  
Pedavenkatagari Narayana Reddy ◽  
Pannala Padmaja
Keyword(s):  
Efficient Method ◽  
Atom Economy ◽  
Reaction Conditions ◽  
One Pot ◽  
Catalyst Free ◽  
One Pot Synthesis ◽  
Three Component Reaction ◽  
High Yields

Abstract:: An efficient method has been developed for the synthesis of new pyrano[3,2-c] and pyrano[3,2-a]carbazole de-rivatives via a three component reaction of 4-hydroxycarbazole or 2-hydroxycarbazole, isocyanides, and dialkylacetylenedi-carboxylates. Noteworthy features of this protocol include mild reaction conditions, catalyst-free, high atom-economy and high yields.

Catalyst-free synthesis of phenanthridines via electrochemical coupling of 2-isocyanobiphenyls and amines

2021 ◽  
Vol 45 (14) ◽  
pp. 6367-6378
Author(s):  
Bhanwar Kumar Malviya ◽  
Karandeep Singh ◽  
Pradeep K. Jaiswal ◽  
Manvika Karnatak ◽  
Ved Prakash Verma ◽  
...  
Keyword(s):  
One Pot ◽  
Metal Free ◽  
Catalyst Free ◽  
Electrochemical Coupling

One pot metal-free synthesis of phenanthridines and amides under electrochemical conditions.

Synthesis of isoxazolidines via catalyst-free one-pot three-component cycloaddition of sulfoxonium ylides, nitrosoarenes and alkenes

2021 ◽  
Author(s):  
Xing Li ◽  
Pingan Zhai ◽  
Yongsheng Fang ◽  
Wenhui Li ◽  
Honghong Chang ◽  
...  
Keyword(s):  
One Pot ◽  
Catalyst Free ◽  
Practical Strategy ◽  
Three Component Reaction

A general and practical strategy for the construction of various keto-substituted isoxazolidines via one-pot three-component reaction of easily accessible, safer and more stable sulfoxonium ylides, nitrosoarenes and olefins is described.

One-pot, catalyst-free synthesis of novel dihydropyrano[2,3-e]indole derivatives

2021 ◽  
Vol 33 ◽  
pp. 100693
Author(s):  
Visarapu Malathi ◽  
Shantholla Shivani ◽  
K Bhaskar ◽  
Vinod G. Ugale ◽  
Pannala Padmaja ◽  
...  
Keyword(s):  
Indole Derivatives ◽  
One Pot ◽  
Catalyst Free
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