Tetrabutylammonium Iodide Catalyzed Epoxidation of Naphthoquinone Derivatives with tert-Butyl Hydroperoxide as an Oxidant

Synthesis ◽  
2017 ◽  
Vol 49 (17) ◽  
pp. 4017-4024 ◽  
Author(s):  
Bai-Ru Ai ◽  
Xu-Ling Chen ◽  
Yu Dong ◽  
Lei Tang ◽  
Ji-Yu Wang
Keyword(s):  
Reaction Time ◽  
Silicon Dioxide ◽  
Environmentally Benign ◽  
Reaction Conditions ◽  
Short Reaction Time ◽  
Butyl Hydroperoxide ◽  
Tert Butyl ◽  
Tert Butyl Hydroperoxide ◽  
Tetrabutylammonium Iodide ◽  
High Yields

An efficient and environmentally benign procedure has been developed for the epoxidation of naphthoquinone derivatives by using tetrabutylammonium iodide as a catalyst and tert-butyl hydroperoxide as an oxidant in the presence of silicon dioxide. This protocol, which provides a facile base-free methodology for the synthesis of some new naphthoquinone-based epoxides, features mild reaction conditions, high yields, remarkably short reaction time, and broad substrate scope

Iodine-Mediated Multi-Component Reactions: Readily Access to Tetrazoles and Guanidines

2020 ◽  
Vol 17 ◽  
Author(s):  
Bajivali Shaik ◽  
Mohan Seelam ◽  
Ramana Tamminana ◽  
Prasad Rao Kammela
Keyword(s):  
Reaction Time ◽  
Benzoyl Chloride ◽  
Functional Group ◽  
Molecular Iodine ◽  
Environmentally Benign ◽  
Reaction Conditions ◽  
One Pot ◽  
Short Reaction Time ◽  
One Pot Synthesis ◽  
High Yields

Abstract: Environmentally benign syntheses of One-pot sequential reactions of benzoyl chloride with amines followed by the treatment of molecular I2 reagent under basic conditions provide benzoyl tetrazoles and guanidines in moderate to excel-lent yields. This one-pot synthesis has several advantages such as mild reaction conditions, short reaction time, convenient workup, high yields, using cheap and readily available reagent molecular Iodine. In addition, functional group tolerance has been explored

Tetrabutylammonium Iodide Catalyzed Synthesis of Allylic Ester with tert-Butyl Hydroperoxide as an Oxidant

2012 ◽  
Vol 14 (13) ◽  
pp. 3384-3387 ◽  
Author(s):  
Erbo Shi ◽  
Ying Shao ◽  
Shulin Chen ◽  
Huayou Hu ◽  
Zhaojun Liu ◽  
...  
Keyword(s):  
Butyl Hydroperoxide ◽  
Tert Butyl ◽  
Tert Butyl Hydroperoxide ◽  
Tetrabutylammonium Iodide

scholarly journals Fe3O4@chitosan-tannic acid bionanocomposite as a novel nanocatalyst for the synthesis of pyranopyrazoles

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Maryam Kamalzare ◽  
Mohammad Reza Ahghari ◽  
Mohammad Bayat ◽  
Ali Maleki
Keyword(s):  
Reaction Time ◽  
Tannic Acid ◽  
High Performance ◽  
Catalytic Performance ◽  
Natural Material ◽  
Magnetic Nanocatalyst ◽  
Reaction Conditions ◽  
One Pot ◽  
Short Reaction Time ◽  
High Yields

AbstractRecently magnetic nanocatalyst has attracted considerable attention because of its unique properties, including high performance, easy separation from the reaction mixture, and recyclability. In this study, a novel magnetic bionanocomposite was synthesized with chitosan and tannic acid as a natural material. The synthesized bionanocatalyst was characterized by essential analysis. Fe3O4@chitosan-tannic acid as a heterogeneous nanocatalyst was successfully applied to synthesize pyranopyrazole and its derivatives by a one-pot four-component reaction of malononitrile, ethyl acetoacetate, hydrazine hydrate, and various aromatic aldehyde. At the end of the reaction, the nanocatalyst was separated from the reaction mixture and was reused several times with no significant decrease in its catalytic performance. Simple purification of products, the ability for recovering and reusing the nanocatalyst, eco-friendliness, high yields of pure products, mild reaction conditions, short reaction time, non-toxicity, economically affordable are some of the advantages of using the fabricated nanocatalyst in the synthesis of pyranopyrazole.

DMAP-catalyzed Efficient and Convenient Approach for the Synthesis of 3,3′-(Arylmethylene)bis(2-Hydroxynaphthalene-1,4-Dione) Derivatives

2021 ◽  
Vol 16 (9) ◽  
pp. 1934578X2110458
Author(s):  
Le Nhat Thuy Giang ◽  
Dang Thi Tuyet Anh ◽  
Hoang Thi Phuong ◽  
Nguyen Ha Thanh ◽  
Nguyen Thi Quynh Giang ◽  
...  
Keyword(s):  
Reaction Time ◽  
Microwave Irradiation ◽  
Aromatic Aldehydes ◽  
Environmentally Benign ◽  
Basic Catalyst ◽  
Reaction Conditions ◽  
Efficient Procedure ◽  
Short Reaction Time ◽  
Convenient Approach ◽  
First Time

For the first time the 4-dimethylaminopyridine (DMAP) catalyzed straightforward and efficient procedure has been developed for the synthesis of 3,3′-(arylmethylene) bis(2-hydroxynaphthalene-1,4-dione) derivatives starting from lawsone (2-hydroxy-1,4-naphthoquinone) and a variety of (hetero)aromatic aldehydes in ethanol under microwave irradiation. Three of nine synthesized compounds are new. This method provides notable advantages over existing procedures including use of non-traditional basic catalyst and environmentally benign solvent, mild reaction conditions, excellent yields, short reaction time and simple workup.

A clean, simple and efficient synthesis of trans-[3-(aryl)-2,3-dihydrofuro[3,2-h] quinolin-2-yl]-(4-chlorophenyl)methanones

2017 ◽  
Vol 41 (7) ◽  
pp. 380-383
Author(s):  
Maryam Salari ◽  
Alireza Hassanabadi ◽  
Mohammad H. Mosslemin
Keyword(s):  
Reaction Time ◽  
Green Chemistry ◽  
Aromatic Aldehyde ◽  
Efficient Method ◽  
Efficient Synthesis ◽  
Reaction Conditions ◽  
Short Reaction Time ◽  
High Yields

We report a green and efficient method for the synthesis of trans-[3-(aryl)-2,3-dihydrofuro[3,2- h]quinolin-2-yl]-(4-chlorophenyl) methanones from the condensation of 2-[2-(4-chlorophenyl)-2-oxoethyl)]isoquinolinium bromide with 8-hydroxyquinoline and an aromatic aldehyde in the presence of catalytic amounts of choline hydroxide in water at reflux conditions. This new protocol employing choline hydroxide, which is a green and inexpensive catalyst, offers advantages such as mild reaction conditions, short reaction time, high yields and does not involve any hazardous solvent. Therefore, this procedure can be classified as green chemistry.

Tandem Cyclization of α-Cyano α-Alkynyl Aryl Ketones Induced by tert-Butyl Hydroperoxide and Tetrabutylammonium Iodide

2012 ◽  
Vol 14 (23) ◽  
pp. 6024-6027 ◽  
Author(s):  
Ying-Chieh Wong ◽  
Chen-Tso Tseng ◽  
Tzu-Ting Kao ◽  
Yu-Cheng Yeh ◽  
Kak-Shan Shia
Keyword(s):  
Butyl Hydroperoxide ◽  
Tert Butyl ◽  
Tert Butyl Hydroperoxide ◽  
Aryl Ketones ◽  
Tetrabutylammonium Iodide ◽  
Tandem Cyclization

An Efficient Ultrasonic-Assisted Synthesis of Enol Carbamates via Oxidative Coupling of Formamides with 1,3-Dicarbonyl Compounds

2020 ◽  
Vol 17 (7) ◽  
pp. 507-511
Author(s):  
Jafar Akbari ◽  
Alireza Akbari Meyestani
Keyword(s):  
Oxidative Coupling ◽  
Cuo Nanoparticles ◽  
Reaction Conditions ◽  
Dicarbonyl Compounds ◽  
Butyl Hydroperoxide ◽  
Mild Conditions ◽  
Tert Butyl Hydroperoxide ◽  
Ultrasonic Assisted ◽  
High Yields ◽  
Derivatives Of

Sonochemical oxidative-coupling of formamides with 1,3-dicarbonyl compounds in the corresponding carbamates by CuO nanoparticles as a catalyst and tert-butyl hydroperoxide (TBHP) as an oxidant has been reported. Various derivatives of enol carbamates were synthesized with good to high yields under the optimized reaction conditions. Compared with conventional methods, the main advantage of this method is mild conditions.

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