ChemInform Abstract: Broensted Acid-Catalyzed Nazarov Cyclization of Pyrrole Derivatives Accelerated by Microwave Irradiation.

ChemInform ◽  
2009 ◽  
Vol 40 (48) ◽  
Author(s):  
Prabhakar Bachu ◽  
Takahiko Akiyama
Keyword(s):  
Microwave Irradiation ◽  
Nazarov Cyclization ◽  
Pyrrole Derivatives ◽  
Acid Catalyzed

A synergetic effect of ionic liquid and microwave irradiation on the acid-catalyzed direct conversion of cellulose into methyl glucopyranoside

Holzforschung ◽  
2018 ◽  
Vol 72 (12) ◽  
pp. 1025-1030
Author(s):  
Mafuyu Saito ◽  
Takao Kishimoto ◽  
Masahiro Hamada ◽  
Noriyuki Nakajima ◽  
Daisuke Urabe
Keyword(s):  
Ionic Liquid ◽  
Microwave Irradiation ◽  
Synergetic Effect ◽  
Acid Catalyst ◽  
Solvent System ◽  
Direct Conversion ◽  
Important Research Topic ◽  
Acid Catalyzed ◽  
Methyl Pyrrolidone

AbstractConversion of lignocellulose into useful chemicals is an important research topic in the area of biomass utilization. In this study, microcrystalline cellulose (MC) was dissolved in a mixed-solvent system containing the ionic liquid (IL) 1-allyl-3-methylimidazolium chloride ([Amim]Cl) andN-methyl-pyrrolidone (NMP), and the cellulose was directly converted into methyl glucoside (MG) by acid-catalyzed methanolysis aided by microwave irradiation (μWIr). Under moderate reaction temperature and pressure, and in the presence of acetyl chloride/methanol (in situformed HCl) as an acid catalyst, MG was obtained in a 42% yield. In contrast, in the absence of either IL or μWIr, the MG yield was only 5 or 21%, respectively. Both μWIr and the dissolution of cellulose in IL were quite effective for the conversion of cellulose into MG.

scholarly journals Clauson Kaas Pyrrole Synthesis Catalyzed by Acidic Ionic Liquid under Microwave Irradiation

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Feray Aydogan ◽  
Cigdem Yolacan
Keyword(s):  
Ionic Liquid ◽  
Reaction Time ◽  
Microwave Irradiation ◽  
Product Formation ◽  
High Yield ◽  
Pyrrole Derivatives ◽  
Short Reaction Time ◽  
Acidic Ionic Liquid ◽  
Clean Product

A new procedure to synthesize the N-substituted pyrrole derivatives by Clauson Kaas reaction catalyzed by acidic ionic liquid under microwave irradiation was developed. This procedure provides several advantages such as high yield, clean product formation, and short reaction time.

ChemInform Abstract: Asymmetric Broensted Acid-Catalyzed Nazarov Cyclization of Acyclic α-Alkoxy Dienones.

ChemInform ◽  
2013 ◽  
Vol 44 (10) ◽  
pp. no-no
Author(s):  
Sadiya Raja ◽  
Winai Ieawsuwan ◽  
Vadim Korotkov ◽  
Magnus Rueping
Keyword(s):  
Nazarov Cyclization ◽  
Acid Catalyzed

Nano-silica sulfuric acid catalyzed the efficient synthesis of 1,3,5-triarylbenzenes under microwave irradiation

2012 ◽  
Vol 9 (5) ◽  
pp. 791-798 ◽  
Author(s):  
R. Ghanbaripour ◽  
I. Mohammadpoor-Baltork ◽  
M. Moghadam ◽  
A. R. Khosropour ◽  
S. Tangestaninejad ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Microwave Irradiation ◽  
Efficient Synthesis ◽  
Silica Sulfuric Acid ◽  
Nano Silica ◽  
Acid Catalyzed

Asymmetric Brønsted Acid-Catalyzed Nazarov Cyclization of Acyclic α-Alkoxy Dienones

2012 ◽  
Vol 7 (10) ◽  
pp. 2361-2366 ◽  
Author(s):  
Sadiya Raja ◽  
Winai Ieawsuwan ◽  
Vadim Korotkov ◽  
Magnus Rueping
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Nazarov Cyclization ◽  
Brönsted Acid ◽  
Acid Catalyzed

ChemInform Abstract: Sulfamic Acid Catalyzed One-Pot Synthesis of 2,5-Diaryl-1,3,4-oxadiazoles under Microwave Irradiation and Conventional Heating.

ChemInform ◽  
2009 ◽  
Vol 40 (37) ◽  
Author(s):  
J. Venu Madhav ◽  
Y. Thirupathi Reddy ◽  
P. Narsimha Reddy ◽  
Peter A. Crooks ◽  
V. Naveen Kumar ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Sulfamic Acid ◽  
Conventional Heating ◽  
One Pot ◽  
One Pot Synthesis ◽  
Acid Catalyzed

Brønsted Acid Catalyzed Asymmetric Nazarov Cyclization

Synfacts ◽  
2007 ◽  
Vol 2007 (4) ◽  
pp. 0432-0432
Author(s):  
M. Rueping ◽  
W. Ieawsuwan ◽  
A. Antonchick ◽  
B. Nachtsheim
Keyword(s):  
Bronsted Acid ◽  
Brønsted Acid ◽  
Nazarov Cyclization ◽  
Brönsted Acid ◽  
Acid Catalyzed

Accessing Polycyclic Terpenoids from Zerumbone via Lewis Acid Catalyzed Synthetic Strategies

Synthesis ◽  
2020 ◽  
Vol 52 (14) ◽  
pp. 2045-2064 ◽  
Author(s):  
Puthiyaparambath Sharathna ◽  
Murugan Thulasi Meenu ◽  
Kokkuvayil Vasu Radhakrishnan ◽  
Bhandara Purayil Dhanya ◽  
Greeshma Gopalan ◽  
...  
Keyword(s):  
Natural Products ◽  
Lewis Acid ◽  
Biologically Active Compounds ◽  
Biologically Active ◽  
Effective Strategy ◽  
Structural Elements ◽  
Nazarov Cyclization ◽  
Active Compounds ◽  
Acid Catalyzed

We herein disclose an effective strategy for the synthesis of [5.3.0] and [6.3.0] fused polycyclic terpenoids, which are important structural elements of natural products and biologically active compounds. The method comprises of Lewis acid catalyzed interrupted Nazarov cyclization of zerumbone derivatives such as zerumbone epoxide, triazole-appended zerumbone, zerumbal, and zerumbenone with a wide substrate scope with different indoles. Zerumbone epoxide furnished [5.3.0] and [6.3.0] fused structurally diverse sesquiterpenoids and all other zerumbone derivatives furnished the [6.3.0] fused motifs.

scholarly journals Acid catalyzed synthesis of 2-(2-aminophenyl)quinazoline-4-amine and reaction with aromatic aldehydes

RSC Advances ◽  
2016 ◽  
Vol 6 (8) ◽  
pp. 6138-6143 ◽  
Author(s):  
Elina Marinho ◽  
M. Fernanda Proença
Keyword(s):  
Microwave Irradiation ◽  
Aromatic Aldehydes ◽  
Conventional Heating ◽  
Hydrochloride Salt ◽  
Acid Catalyzed

The hydrochloride salt of 2-(2-aminophenyl)quinazoline-4-amine, prepared from a quinazolino[3,4-a]quinazoline, was reacted with aromatic aldehydes under conventional heating or microwave irradiation, leading to tetracyclic dihydroquinazolines.

Sign in / Sign up

Export Citation Format

Share Document