High yield and greener C–H difluoromethylation reactions using copper iodide nanoparticles/boron nitride nanosheets as a versatile and recyclable heterogeneous catalyst

2021 ◽  
Author(s):  
Udayakumar Veerabagu ◽  
Gowsika Jaikumar ◽  
Fushen Lu ◽  
Franck Quero
Keyword(s):  
Boron Nitride ◽  
Heterogeneous Catalyst ◽  
High Efficiency ◽  
High Yield ◽  
Copper Iodide ◽  
Boron Nitride Nanosheets ◽  
Greener Synthesis ◽  
High Yields ◽  
Recyclable Heterogeneous Catalyst

The 3 wt% CuI/BNNS catalyst exhibited high efficiency for C–H difluoromethylation reactions and enabled greener synthesis at high yields using cyrene as a solvent. Furthermore, the catalyst could be easily recovered and recycled for at least five cycles.

Scalable production of high-quality boron nitride nanosheets via a recyclable salt-templating method

2019 ◽  
Vol 21 (24) ◽  
pp. 6746-6753 ◽  
Author(s):  
Yancui Xu ◽  
Taotao Li ◽  
Weiwei Xu ◽  
Chaowei Li ◽  
Songfeng E ◽  
...  
Keyword(s):  
Boron Nitride ◽  
High Efficiency ◽  
High Quality ◽  
Templating Method ◽  
Boron Nitride Nanosheets ◽  
Boron Nitride Nanosheet ◽  
Scalable Production

Hollow-structured boron nitride nanosheet cubes were produced via a recyclable salt-templating method, which leads to a high efficiency up to 88.4% on a gram scale.

Flame-retardant activity of modified boron nitride nanosheets to cotton

2019 ◽  
Vol 90 (5-6) ◽  
pp. 512-522 ◽  
Author(s):  
Hong Liu ◽  
Yang Du ◽  
Shaohua Lei ◽  
Zhuoqun Liu
Keyword(s):  
Boron Nitride ◽  
Flame Retardant ◽  
Hexagonal Boron Nitride ◽  
Cotton Fabrics ◽  
High Yield ◽  
Limiting Oxygen Index ◽  
Boron Nitride Nanosheets ◽  
Boron Nitride Powder ◽  
Coated Fabrics ◽  
Index Value

Boron nitride nanosheets (BNN) were prepared by molten hydroxide-assisted liquid exfoliation from hexagonal boron nitride powder with an effectively high yield, and then modified with hexachlorocyclotriphosphazene (HCCP) to obtain HCCP-BNN. The series of samples were applied to prepare flame-retardant cotton fabrics with the impregnation-drying method, and successful treatment was confirmed by scanning electron microscopy. The combustion performance of the as-prepared cotton fabrics was tested and evaluated. After coating with HCCP-BNN, the combustion rate of the fabric is reduced in vertical and horizontal combustion conditions and the limiting oxygen-index value of cotton fabric increases to 24.1, becoming less flammable than the blank cotton. The fibrous structure of the BNN and HCCP-BNN coated fabrics is relatively complete after combustion, which indicates that BNN have a certain protective effect on the fabric. The results demonstrate HCCP-BNN as an effective flame-retardant for cotton fabrics.

A magnetic porous chitosan-based palladium catalyst: a green, highly efficient and reusable catalyst for Mizoroki–Heck reaction in aqueous media

2015 ◽  
Vol 39 (10) ◽  
pp. 7988-7997 ◽  
Author(s):  
Barahman Movassagh ◽  
Nasrin Rezaei
Keyword(s):  
Heterogeneous Catalyst ◽  
Palladium Catalyst ◽  
Heck Reaction ◽  
Aqueous Media ◽  
Reusable Catalyst ◽  
Highly Efficient ◽  
Highly Active ◽  
Porous Chitosan ◽  
High Yields ◽  
Recyclable Heterogeneous Catalyst

We have prepared a highly active and recyclable heterogeneous catalyst for the Heck reaction in aqueous media in high yields.

Scalable Exfoliation and High‐Efficiency Separation Membrane of Boron Nitride Nanosheets

2020 ◽  
Vol 5 (12) ◽  
pp. 3567-3573
Author(s):  
Zhen Wang ◽  
Yanjiao Zhu ◽  
Dong Ji ◽  
Zhifeng Li ◽  
Haibin Yu
Keyword(s):  
Boron Nitride ◽  
High Efficiency ◽  
Boron Nitride Nanosheets ◽  
Separation Membrane

High-Yield Synthesis of Boron Nitride Nanosheets with Strong Ultraviolet Cathodoluminescence Emission

2009 ◽  
Vol 113 (34) ◽  
pp. 15160-15165 ◽  
Author(s):  
Rui Gao ◽  
Longwei Yin ◽  
Chengxiang Wang ◽  
Yongxin Qi ◽  
Ning Lun ◽  
...  
Keyword(s):  
Boron Nitride ◽  
High Yield ◽  
Boron Nitride Nanosheets

scholarly journals H3PW12O40: An Efficient and Recyclable Heterogeneous Catalyst for the Selective Synthesis of 2-Aryl-5,6-dihydro-4H-1,3-oxazines and 2-Aryl-1,4,5,6-tetrahydropyrimidines

2010 ◽  
Vol 65 (4) ◽  
pp. 461-469 ◽  
Author(s):  
Iraj Mohammadpoor-Baltork ◽  
Majid Moghadam ◽  
Shahram Tangestaninejad ◽  
Valiollah Mirkhani ◽  
Zohre Eskandari
Keyword(s):  
Heterogeneous Catalyst ◽  
High Purity ◽  
Environmentally Friendly ◽  
Thermal Conditions ◽  
Selective Synthesis ◽  
Reaction Conditions ◽  
Efficient Procedure ◽  
Mw Irradiation ◽  
High Yields ◽  
Recyclable Heterogeneous Catalyst

An environmentally friendly and highly efficient procedure has been developed for the selective synthesis of 2-aryl-5,6-dihydro-4H-1,3-oxazines and 2-aryl-1,4,5,6-tetrahydropyrimidines by cyclocondensation of arylnitriles with 3-amino-1-propanol and 1,3-diaminopropane in the presence of catalytic amounts of H3PW12O40 under thermal conditions and MW irradiation. Under the same reaction conditions, dicyanobenzenes are transformed to their corresponding mono-oxazines and monotetrahydropyrimidines with excellent chemoselectivity. These reactions are simple and clean, giving the products in high yields and high purity. The catalyst can be easily recovered after the reaction and reused efficiently in subsequent runs.

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