Sustainable One-Pot Cellulose Dissolution and Derivatization via a Tandem Reaction in the DMSO/DBU/CO2 Switchable Solvent System

2021 ◽  
Author(s):  
Jonas Wolfs ◽  
Roman Nickisch ◽  
Lisa Wanner ◽  
Michael A. R. Meier
Keyword(s):  
Solvent System ◽  
Tandem Reaction ◽  
Cellulose Dissolution ◽  
One Pot

scholarly journals Synthesis of structurally diverse 3,4-dihydropyrimidin-2(1H)-ones via sequential Biginelli and Passerini reactions

2017 ◽  
Vol 13 ◽  
pp. 54-62 ◽  
Author(s):  
Andreas C Boukis ◽  
Baptiste Monney ◽  
Michael A R Meier
Keyword(s):  
Multicomponent Reactions ◽  
Biginelli Reaction ◽  
2D Nmr ◽  
Solvent System ◽  
Solvent Mixture ◽  
Tandem Reaction ◽  
Reaction Step ◽  
Passerini Reaction ◽  
One Pot ◽  
First Time

The Biginelli reaction was combined with the Passerini reaction for the first time in a sequential multicomponent tandem reaction approach. After evaluation of all possible linker components and a suitable solvent system, highly functionalized dihydropyrimidone–α-acyloxycarboxamide compounds were obtained in good to excellent yields. In a first reaction step, different 3,4-dihydropyrimidin-2(1H)-one acids were synthesized, isolated and fully characterized. These products were subsequently used in a Passerini reaction utilizing a dichloromethane/dimethyl sulfoxide solvent mixture. By variation of the components in both multicomponent reactions, a large number of structurally diverse compounds could be synthesized. In addition, a one-pot Biginelli–Passerini tandem reaction was demonstrated. All products were carefully characterized via 1D and 2D NMR as well as IR and HRMS.

ChemInform Abstract: Copper-Assisted/Copper-Free Synthesis of Functionalized Dibenzo[b,f]oxepins and Their Analogues via a One-Pot Tandem Reaction.

ChemInform ◽  
2013 ◽  
Vol 44 (28) ◽  
pp. no-no
Author(s):  
Yuqin Wang ◽  
Yanhong Chen ◽  
Qian He ◽  
Yuyuan Xie ◽  
Chunhao Yang
Keyword(s):  
Tandem Reaction ◽  
One Pot

Metal-Alkali Catalytic Valorization of Lignocellulose Towards Aromatics and Small Molecular Alcohols and Acids in a Holistic Approach

2021 ◽  
Author(s):  
Wei Lv ◽  
Yuting Zhu ◽  
Weiqi Mai ◽  
Changhui Zhu ◽  
Qifeng Pi ◽  
...  
Keyword(s):  
Phase Separation ◽  
Room Temperature ◽  
Holistic Approach ◽  
Woody Biomass ◽  
Solvent System ◽  
Effective Strategy ◽  
One Pot ◽  
Reaction Phase ◽  
Alkali Catalysts ◽  
O Phase

Abstract In this work, we developed an approach of one-pot completely catalytic conversion of woody biomass into two value product streams: lignin-derived aromatics (68.54% monomer and 29.65% oligomer yields of lignin) and (semi-)cellulose-derived small molecular alcohols (about 59.60% of biomass mass). These could be afforded by conducting lignocellulose depolymerization over metal-alkaline catalysts in a mixture n-butanol/H2O solvent system at 250 °C and 30 bar H2. In the valorization process, the homogenous mixture of n-butanol-H2O solvents extract and depolymerize both lignin and hemicellulose, while the catalysts and H2 are essential to cleave the inter-/intramolecular linkages of lignocellulose into target products. After the reaction, phase separation of n-butanol and H2O takes place when systematic temperature at room temperature, providing a mild and effective strategy to isolate lignin-derived aromatics (n-butanol phase) from small molecular alcohols/acids (aqueous phase). Ru/C and alkali catalysts are collected by filtration from n-butanol phase and H2O phase, respectively. Meanwhile, the effect of metal-alkali coupled catalysts enables facilitating the cleavage of β-O-4 linkage of lignin and increasing the attainability of (semi-)cellulose-derived oligomers and the small molecular alcohols. This catalytic system provides a versatile valorization approach for biomass catalytic to bio-based chemicals.

ChemInform Abstract: One-Pot Synthesis of 3,4-Dihydropyridin-2-ones via Tandem Reaction of Blaise Reaction Intermediate and Acrylic Ester.

ChemInform ◽  
2016 ◽  
Vol 47 (18) ◽  
Author(s):  
Tuanjie Meng ◽  
Lantao Liu ◽  
Huiyi Jia ◽  
Lifeng Ren ◽  
Cuilan Feng ◽  
...  
Keyword(s):  
Tandem Reaction ◽  
One Pot ◽  
Reaction Intermediate ◽  
One Pot Synthesis ◽  
Acrylic Ester

One‐Pot Synthetic Procedure for2,2′‐Disubstituted Biaryls via the Suzuki Coupling Reaction of Aryl Triflates in a Biphasic Solvent System

2006 ◽  
Vol 36 (24) ◽  
pp. 3809-3820 ◽  
Author(s):  
Masanori Miura ◽  
Takanori Koike ◽  
Tsukasa Ishihara ◽  
Fukushi Hirayama ◽  
Shuichi Sakamoto ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Suzuki Coupling ◽  
Solvent System ◽  
One Pot ◽  
Suzuki Coupling Reaction ◽  
Synthetic Procedure

ChemInform Abstract: An Electrochemical Tandem Reaction: One-Pot Synthesis of Homoallylic Alcohols from Alcohols in Aqueous Media.

ChemInform ◽  
2011 ◽  
Vol 42 (7) ◽  
pp. no-no
Author(s):  
Li Zhang ◽  
Zhenggen Zha ◽  
Zhenlei Zhang ◽  
Yunfeng Li ◽  
Zhiyong Wang
Keyword(s):  
Aqueous Media ◽  
Tandem Reaction ◽  
One Pot ◽  
One Pot Synthesis ◽  
Homoallylic Alcohols

One-Pot Synthesis of 4-Sulfonyliminotetrahydropyrimidin-2-one Derivatives through a Copper-Catalyzed Tandem Reaction

2018 ◽  
Vol 83 (24) ◽  
pp. 15533-15540 ◽  
Author(s):  
Tao Tong ◽  
Xin Wu ◽  
Erfei Li ◽  
Honglan Kang ◽  
Xiaoxia Wang ◽  
...  
Keyword(s):  
Tandem Reaction ◽  
One Pot ◽  
One Pot Synthesis

An efficient and recyclable acid–base bifunctional core–shell nano-catalyst for the one-pot deacetalization–Knoevenagel tandem reaction

2018 ◽  
Vol 42 (14) ◽  
pp. 11610-11615 ◽  
Author(s):  
Zitao Wang ◽  
Xiaofeng Yuan ◽  
Qi’an Cheng ◽  
Tichun Zhang ◽  
Jun Luo
Keyword(s):  
Tandem Reaction ◽  
Core Shell ◽  
Acid Base ◽  
One Pot ◽  
Recoverable Catalyst ◽  
Nano Catalyst ◽  
The One

An acid–base bifunctional nano-catalyst was synthesized and applied as an efficient and recoverable catalyst in the one-pot deacetalization–Knoevenagel tandem reaction.

scholarly journals Triflic anhydride mediated synthesis of 3,4-dihydroquinazolines: a three-component one-pot tandem procedure

2019 ◽  
Vol 17 (34) ◽  
pp. 7995-8000 ◽  
Author(s):  
Christina L. Magyar ◽  
Tyler J. Wall ◽  
Steven B. Davies ◽  
Molly V. Campbell ◽  
Haven A. Barna ◽  
...  
Keyword(s):  
Tandem Reaction ◽  
One Pot

A triflic anhydride mediated one-pot tandem reaction involving a Pictet–Spengler-like annulation step has been developed for the synthesis of 3,4-dihydroquinazolines.

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