Single-step catalytic synthesis of diphenyl carbonate over transition-metal-substituted Keggin-type tungstophosphoric acid

2008 ◽  
Vol 9 (15) ◽  
pp. 2560-2564 ◽  
Author(s):  
Shengjun Luo ◽  
Yingnan Chi ◽  
Lingna Sun ◽  
Qiang Wang ◽  
Changwen Hu
Keyword(s):  
Transition Metal ◽  
Single Step ◽  
Catalytic Synthesis ◽  
Tungstophosphoric Acid ◽  
Diphenyl Carbonate ◽  
Keggin Type

Transition Metal-free Single Step Approach for Arylated Pyrazolopyrimidinones and Quinazolinones Using Benzylamines/Benzylalcohols/Benzaldehydes

2017 ◽  
Vol 2 (17) ◽  
pp. 4963-4968 ◽  
Author(s):  
Abhinandan D. Hudwekar ◽  
G. Lakshma Reddy ◽  
Praveen K. Verma ◽  
Sorav Gupta ◽  
Ram A. Vishwakarma ◽  
...  
Keyword(s):  
Transition Metal ◽  
Single Step ◽  
Metal Free

scholarly journals Speciation of Transition-Metal-Substituted Keggin-Type Silicotungstates Affected by the Co-crystallization Conditions with Proteinase K

2021 ◽  
Author(s):  
Joscha Breibeck ◽  
Elias Tanuhadi ◽  
Nadiia I. Gumerova ◽  
Gerald Giester ◽  
Alexander Prado-Roller ◽  
...  
Keyword(s):  
Transition Metal ◽  
Proteinase K ◽  
Keggin Type ◽  
Crystallization Conditions

scholarly journals Molten Salt-Directed Catalytic Synthesis of 2D Layered Transition-Metal Nitrides for Efficient Hydrogen Evolution

Chem ◽  
2020 ◽  
Vol 6 (9) ◽  
pp. 2382-2394 ◽  
Author(s):  
Huanyu Jin ◽  
Qinfen Gu ◽  
Bo Chen ◽  
Cheng Tang ◽  
Yao Zheng ◽  
...  
Keyword(s):  
Transition Metal ◽  
Molten Salt ◽  
Hydrogen Evolution ◽  
Catalytic Synthesis ◽  
Metal Nitrides ◽  
Transition Metal Nitrides ◽  
Layered Transition Metal

Ethanol dehydration over Keggin type tungstophosphoric acid and its potassium salts supported on carbon

2019 ◽  
Vol 128 (1) ◽  
pp. 121-137 ◽  
Author(s):  
Ivanka Holclajtner-Antunović ◽  
Snežana Uskoković-Marković ◽  
Alexandru Popa ◽  
Anka Jevremović ◽  
Bojana Nedić Vasiljević ◽  
...  
Keyword(s):  
Tungstophosphoric Acid ◽  
Ethanol Dehydration ◽  
Potassium Salts ◽  
Keggin Type

scholarly journals Novel catalytic synthesis of 6,7-dimethoxyisatin with the use of heteropolyacids (HPAs) as acid solid catalyst

2009 ◽  
Vol 11 (3) ◽  
pp. 5-7 ◽  
Author(s):  
Ali Gharib ◽  
Mohsen Daneshtalab ◽  
J. Scheeren ◽  
Fatemeh Bamoharram ◽  
Mina Roshani ◽  
...  
Keyword(s):  
Efficient Method ◽  
Good Yield ◽  
Acid Catalyst ◽  
Catalytic Synthesis ◽  
The Other ◽  
Solid Catalyst ◽  
Keggin Type ◽  
Mineral Acids ◽  
Green Conditions

Novel catalytic synthesis of 6,7-dimethoxyisatin with the use of heteropolyacids (HPAs) as acid solid catalyst An efficient method for the preparation of 6,7-dimethoxyisatin and its derivatives was developed with good yield by using Preyssler-type heteropolyacid (HPA) as acid catalyst under green conditions. The comparison between Keggin type heteropolyacids, H3[PW12O40], H4[SiW12O40] and H4[SiMo12O40], H3[PMo12O40] and mineral acids with Preyssler's anion shows that the latter possess better catalytical activity than the other heteropolyacids and no degradation of the structure was observed.

Transition-Metal-Free, Intermolecular Azidoheteroarylation of Alkenes: Efficient Access to β-Azidoalkylated Quinoxalinones and Preliminary Antifungal Evaluation Against Magnaporthe grisea

Synthesis ◽  
2020 ◽  
Vol 52 (16) ◽  
pp. 2395-2409
Author(s):  
Weiwei Qin ◽  
Zhaodong Li ◽  
Yiming Du ◽  
Yue Chen ◽  
Yun-Lin Liu
Keyword(s):  
Transition Metal ◽  
Magnaporthe Grisea ◽  
Single Step ◽  
Domino Reaction ◽  
Efficient Synthesis ◽  
Metal Free ◽  
Efficient Access ◽  
First Time ◽  
Antibacterial Evaluation ◽  
Addition Pathway

An efficient, PhI(OAc)2-mediated, radical azidoheteroarylation of alkenes under transition-metal-free conditions is reported by employing TMSN3 and quinoxalin-2(1H)-ones as coupling partners. This domino reaction allows an efficient synthesis of valuable orangoazides containing quinoxalin-2(1H)-one derivatives and could be extended to phosphinyl-alkylated quinoxalin-2(1H)-one in a single step in moderate to excellent yields under mild conditions, as demonstrated by the preliminary antibacterial evaluation against Magnaporthe grisea for the first time. Mechanistic studies revealed that this transformation undergoes a cascade addition pathway controlled by a polar radical.

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