The phosphinoboration of carbodiimides, isocyanates, isothiocyanates and CO2

2017 ◽  
Vol 46 (33) ◽  
pp. 10876-10885 ◽  
Author(s):  
Stephen J. Geier ◽  
James H. W. LaFortune ◽  
Diya Zhu ◽  
Stephanie C. Kosnik ◽  
Charles L. B. Macdonald ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Transition Metal ◽  
High Yield ◽  
Metal Free

The transition metal-free addition of phosphinoboronate ester Ph2PBpin (pin = 1,2-O2C2Me4) to heterocumulenes including carbodiimides, isocyanates, isothiocyanates and carbon dioxide proceeds with remarkable selectivity to give products in high yield.

Regioselective 1,4-conjugate aza-Michael addition of dienones with benzotriazole

2017 ◽  
Vol 23 (4) ◽  
Author(s):  
Zheng Li ◽  
Tianpeng Li ◽  
Rugang Fu ◽  
Jingya Yang
Keyword(s):  
Transition Metal ◽  
Michael Addition ◽  
Potassium Acetate ◽  
High Yield ◽  
Metal Free ◽  
Mild Conditions

AbstractThe regioselective 1,4-conjugate aza-Michael addition of dienones with benzotriazole catalyzed by potassium acetate is described. A series of 3-(benzotriazol-1-yl)-1,5-diarylpent-4-en-1-ones were efficiently synthesized under mild conditions. This protocol has advantages of transition-metal free catalyst, high yield and high regioselectivity.

scholarly journals Photocatalytic Synthesis of Tetra-Substituted Furans Promoted by Carbon Dioxide

2021 ◽  
Author(s):  
Ya-Ming Tian ◽  
Huaiju Wang ◽  
Ritu Ritu ◽  
Burkhard Koenig
Keyword(s):  
Carbon Dioxide ◽  
Transition Metal ◽  
Visible Light ◽  
Metal Free ◽  
Mild Conditions ◽  
Simple Protocol ◽  
Visible Light Driven ◽  
Substituted Furans ◽  
Photocatalytic Synthesis

We report a simple protocol for the transition metal-free, visible-light-driven conversion of 1,3-diketones to tetra-substituted furan skeleton compounds in carbon dioxide (CO2) atmosphere under mild conditions. It was found that...

ChemInform Abstract: Transition-Metal-Free Catalytic Reduction of Carbon Dioxide

ChemInform ◽  
2014 ◽  
Vol 45 (22) ◽  
pp. no-no
Author(s):  
Frederic-Georges Fontaine ◽  
Marc-Andre Courtemanche ◽  
Marc-Andre Legare
Keyword(s):  
Carbon Dioxide ◽  
Transition Metal ◽  
Catalytic Reduction ◽  
Metal Free

State-of-the-art catechol porphyrin COF catalyst for chemical fixation of carbon dioxide via cyclic carbonates and oxazolidinones

2016 ◽  
Vol 6 (15) ◽  
pp. 6152-6158 ◽  
Author(s):  
Vitthal Saptal ◽  
Digambar Balaji Shinde ◽  
Rahul Banerjee ◽  
Bhalchandra M. Bhanage
Keyword(s):  
Carbon Dioxide ◽  
Transition Metal ◽  
State Of The Art ◽  
Value Added ◽  
Chemical Fixation ◽  
Cyclic Carbonates ◽  
Metal Free ◽  
Highly Porous ◽  
Fixation Of Carbon Dioxide

A highly porous, crystalline catechol porphyrin COF was synthesized and applied as an organocatalyst for the fixation of carbon dioxide to synthesize value-added chemicals such as cyclic carbonates and oxazolidinones under solvent and transition-metal-free conditions.

scholarly journals Transition-Metal-Free Catalytic Reduction of Carbon Dioxide

2014 ◽  
Vol 20 (11) ◽  
pp. 2990-2996 ◽  
Author(s):  
Frédéric-Georges Fontaine ◽  
Marc-André Courtemanche ◽  
Marc-André Légaré
Keyword(s):  
Carbon Dioxide ◽  
Transition Metal ◽  
Catalytic Reduction ◽  
Metal Free

B(C6F5)3: a robust catalyst for the activation of CO2 and dimethylamine borane for the N-formylation reactions

2018 ◽  
Vol 42 (19) ◽  
pp. 15847-15851 ◽  
Author(s):  
Vitthal B. Saptal ◽  
Gaurav Juneja ◽  
Bhalchandra M. Bhanage
Keyword(s):  
Carbon Dioxide ◽  
Transition Metal ◽  
Hydrogen Transfer ◽  
Metal Free ◽  
Dimethylamine Borane

In this work, B(C6F5)3 is utilized as an organocatalyst for the transition-metal-free N-formylation of amines using carbon dioxide (CO2) as a C1 source and dimethylamine borane (Me2NH·BH3) as a green hydrogen transfer source at 80 °C.

Transition-Metal-Free Aerobic Oxidative Cross-Coupling of Indoles with Arylidenemalononitriles

Synlett ◽  
2019 ◽  
Vol 31 (02) ◽  
pp. 194-198
Author(s):  
Aizhen Yang ◽  
Zheng Li
Keyword(s):  
Transition Metal ◽  
Efficient Method ◽  
Cross Coupling ◽  
Transition Metal Catalysts ◽  
High Yield ◽  
Atom Economy ◽  
Direct Construction ◽  
Organometallic Reagents ◽  
Metal Free ◽  
Mild Conditions

An efficient method for the direct construction of C(sp2)–C(sp2) bonds by aerobic oxidative cross-coupling of indoles with arylidenemalononitriles is described. Various [aryl(1H-indol-3-yl)methylene]malononitriles were efficiently synthesized by using air as an oxidant under mild conditions. The salient features for this protocol are no transition-metal catalysts, no organometallic reagents, high atom economy, high yield, mild conditions, and simple workup procedures.

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