A catalyst-free, efficient green MCR protocol for access to functionalized γ-carbolines in water

RSC Advances ◽  
2015 ◽  
Vol 5 (65) ◽  
pp. 52497-52507 ◽  
Author(s):  
Anuradha Dagar ◽  
Soumen Biswas ◽  
Sampak Samanta
Keyword(s):  
Room Temperature ◽  
Indole Derivatives ◽  
Aerobic Conditions ◽  
Catalyst Free ◽  
Green Procedure

A catalyst-free green procedure for access to substituted γ-carbolines has been achieved in water with excellent yields via a MCR reaction of 3-formyl indole derivatives, aldehydes with NH4OAc at room temperature under aerobic conditions.

Visible-light-initiated Catalyst-free Oxidative Cleavage of Triaryl-Substituted Alkenes C=C Bonds under Ambient Conditions

2021 ◽  
Author(s):  
Wenjing Li ◽  
Shun Li ◽  
Lihua Luo ◽  
Yichen Ge ◽  
Jiaqi Xu ◽  
...  
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Ambient Air ◽  
Oxidative Cleavage ◽  
Ambient Conditions ◽  
Blue Led ◽  
Catalyst Free

The catalyst-free oxidative cleavage of (Z)-triaryl-substituted alkenes bearing pyridyl motif with ambient air under irradiation of blue LED at room temperature has been developed. The reaction was facile and scalable,...

An efficient construction of CN bond under catalyst‐free and room temperature conditions

2021 ◽  
Vol 58 (5) ◽  
pp. 1179-1191
Author(s):  
Jinpeng Zhang ◽  
Jing Liu ◽  
Lei Dai ◽  
Yuqian Ge ◽  
Linlin Xu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Catalyst Free ◽  
Temperature Conditions ◽  
Efficient Construction

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

Catalyst-free coupling of indole derivatives with 3,4-dihydroisoquinoline and related compounds

2013 ◽  
Vol 54 (37) ◽  
pp. 5069-5071 ◽  
Author(s):  
István Szatmári ◽  
Judit Sas ◽  
Ferenc Fülöp
Keyword(s):  
Indole Derivatives ◽  
Catalyst Free ◽  
Related Compounds

ChemInform Abstract: A Catalyst-Free N-Benzyloxycarbonylation of Amines in Aqueous Micellar Media at Room Temperature.

ChemInform ◽  
2008 ◽  
Vol 39 (47) ◽  
Author(s):  
Janhavi J. Shrikhande ◽  
Manoj B. Gawande ◽  
Radha V. Jayaram
Keyword(s):  
Room Temperature ◽  
Micellar Media ◽  
Catalyst Free

Catalyst-Free Oxidative [3+2] Cycloaddition of Phenols and Styrenes in the Presence of a 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone/1,1,1,3,3,3-hexafluoropropan-2-ol System

Synlett ◽  
2017 ◽  
Vol 28 (19) ◽  
pp. 2619-2623 ◽  
Author(s):  
Yunxia Wang ◽  
Na Cui ◽  
Yu Zhao
Keyword(s):  
Room Temperature ◽  
Catalyst Free

A catalyst-free oxidative [3+2] cycloaddition of phenols and styrenes was developed with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone as the oxidant and 1,1,1,3,3,3-hexafluoropropan-2-ol as the solvent at room temperature. With this method, a broad range of dihydrobenzofurans were efficiently and quickly obtained from readily available phenols and styrenes.

Sodium sulphide promoted synthesis of fused quinoline at room temperature

2021 ◽  
Author(s):  
Rashmi Singh ◽  
Vishal Prasad Sharma ◽  
Priyanka Yadav ◽  
Priyanka Sonker ◽  
Radhey Mohan Singh ◽  
...  
Keyword(s):  
Room Temperature ◽  
Sodium Sulphide ◽  
Catalyst Free

A novel, simple and eco-friendly strategy for the synthesis of thiopyrano[4,3-b]quinolin-1-ones and pyrrolo[3,4-b]quinolin-1-ones from 2-alkynylquinoline-3-carbonitriles and sodium sulphide (Na2S·9H2O) under catalyst-free conditions at RT.

A mild heteroatom (O-, N-, and S-) methylation protocol using trimethyl phosphate (TMP)-Ca(OH)2 combination

Synthesis ◽  
2022 ◽  
Author(s):  
Yu Tang ◽  
Biao Yu
Keyword(s):  
Cost Efficiency ◽  
Room Temperature ◽  
High Efficiency ◽  
Attractive Alternative ◽  
Indole Derivatives ◽  
Trimethyl Phosphate ◽  
Environmental Friendly ◽  
Operational Simplicity

A mild heteroatom methylation protocol using trimethyl phosphate (TMP)-Ca(OH)2 combination has been developed, which proceeds in DMF, or water, or under neat conditions at 80 oC or at room temperature. A series of O-, N- and S-nucleophiles, including phenols, sulfonamides, N-heterocycles such as 9H-carbazole, indole derivatives, 1,8-naphthalimide, and aryl/alkyl thiols are suitable substrates of this protocol. The high efficiency, operational simplicity, scalability, cost-efficiency, and environmental friendly nature of this protocol make it an attractive alternative to the conventional base prompted heteroatom methylation procedures.

scholarly journals A New Heterogeneous Catalyst Obtained via Supramolecular Decoration of Graphene with a Pd2+ Azamacrocyclic Complex

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2714 ◽  
Author(s):  
Matteo Savastano ◽  
Paloma Arranz-Mascarós ◽  
Maria Paz Clares ◽  
Rafael Cuesta ◽  
Maria Luz Godino-Salido ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Self Assembly ◽  
Room Temperature ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Assembly Process ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
Cross Coupling Reaction ◽  
Green Procedure

A new G-(H2L)-Pd heterogeneous catalyst has been prepared via a self-assembly process consisting in the spontaneous adsorption, in water at room temperature, of a macrocyclic H2L ligand on graphene (G) (G + H2L = G-(H2L)), followed by decoration of the macrocycle with Pd2+ ions (G-(H2L) + Pd2+ = G-(H2L)-Pd) under the same mild conditions. This supramolecular approach is a sustainable (green) procedure that preserves the special characteristics of graphene and furnishes an efficient catalyst for the Cu-free Sonogashira cross coupling reaction between iodobenzene and phenylacetylene. Indeed, G-(H2L)-Pd shows an excellent conversion (90%) of reactants into diphenylacetylene under mild conditions (50 °C, water, aerobic atmosphere, 14 h). The catalyst proved to be reusable for at least four cycles, although decreasing yields down to 50% were observed.

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