Selective Synthesis of Cyclic Carbonate by Salalen-Aluminum Complexes and Mechanistic Studies

ChemSusChem ◽  
2017 ◽  
Vol 10 (6) ◽  
pp. 1217-1223 ◽  
Author(s):  
Mariachiara Cozzolino ◽  
Tomer Rosen ◽  
Israel Goldberg ◽  
Mina Mazzeo ◽  
Marina Lamberti
Keyword(s):  
Cyclic Carbonate ◽  
Selective Synthesis ◽  
Mechanistic Studies ◽  
Aluminum Complexes

Selective Synthesis of Tetrasubstituted Olefins by Copper-Mediated Acetoxythiolation of Internal Alkynes: Scope and Mechanistic Studies

2018 ◽  
Vol 24 (50) ◽  
pp. 13124-13135 ◽  
Author(s):  
Pedro Villuendas ◽  
Sara Ruiz ◽  
Pietro Vidossich ◽  
Agustí Lledós ◽  
Esteban P. Urriolabeitia
Keyword(s):  
Selective Synthesis ◽  
Mechanistic Studies ◽  
Internal Alkynes ◽  
Tetrasubstituted Olefins

Bimetallic scorpionate-based helical organoaluminum complexes for efficient carbon dioxide fixation into a variety of cyclic carbonates

2020 ◽  
Vol 10 (10) ◽  
pp. 3265-3278 ◽  
Author(s):  
Marta Navarro ◽  
Luis F. Sánchez-Barba ◽  
Andrés Garcés ◽  
Juan Fernández-Baeza ◽  
Israel Fernández ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Cyclic Carbonate ◽  
Carbon Dioxide Fixation ◽  
Cyclic Carbonates ◽  
Carbonate Formation ◽  
Aluminum Complexes

The binuclear aluminum complexes [AlR2(κ2-NN′;κ2-NN′)AlR2] with TBAB/PPNCl behave as excellent systems for cyclic carbonate formation from CO2 with challenging epoxides.

Photoinduced Oxidative Cross-Coupling for O–S Bond Formation: A Facile Synthesis of Alkyl Benzenesulfonates

Synlett ◽  
2017 ◽  
Vol 28 (13) ◽  
pp. 1558-1563 ◽  
Author(s):  
Aiwen Lei ◽  
Atul Singh ◽  
Hong Yi ◽  
Guoting Zhang ◽  
Changliang Bian ◽  
...  
Keyword(s):  
Visible Light ◽  
Bond Formation ◽  
Cross Coupling ◽  
Selective Synthesis ◽  
Mechanistic Studies ◽  
Facile Synthesis ◽  
Metal Free

We have developed a photoinduced oxidative cross-coupling of thiophenols with alcohols for O–S bond formation. The protocol uses visible light, a metal-free photocatalyst, and oxygen as the oxidant for the selective synthesis of alkyl benzenesulfonates; no ligand co-additive is necessary. Mechanistic studies suggested that the disulfide and alkyl benzenesulfinate are involved as intermediates and that the transformation proceeds by a radical pathway.

Sequence controlled copolymerization of lactide and a functional cyclic carbonate using stereoselective aluminum catalysts

2019 ◽  
Vol 10 (29) ◽  
pp. 4042-4048 ◽  
Author(s):  
Xiufang Hua ◽  
Xinli Liu ◽  
Dongmei Cui
Keyword(s):  
Random Sequence ◽  
Cyclic Carbonate ◽  
Aluminum Complexes ◽  
Sequence Distributions

Stereoselective aluminum complexes were applied for the ROP of LA and MAC producing functional copolyesters with quasi-diblock, tapered, gradient and random sequence distributions.

Aluminum complexes derived from a hexadentate salen-type Schiff base: synthesis, structure, and catalysis for cyclic carbonate synthesis

2017 ◽  
Vol 46 (18) ◽  
pp. 5848-5855 ◽  
Author(s):  
Ya Xu ◽  
Dan Yuan ◽  
Yaorong Wang ◽  
Yingming Yao
Keyword(s):  
Schiff Base ◽  
Atmospheric Pressure ◽  
Cycloaddition Reaction ◽  
Cyclic Carbonate ◽  
Aluminum Complex ◽  
Aluminum Complexes

The unexpected aluminum complex was synthesized and found to be active in the cycloaddition reaction of terminal epoxides and CO2 at atmospheric pressure.

Gold-catalyzed synthesis of N,O-heterocycles

2010 ◽  
Vol 82 (3) ◽  
pp. 657-668 ◽  
Author(s):  
A. Stephen K. Hashmi
Keyword(s):  
Double Bond ◽  
Gold Catalysis ◽  
Selective Synthesis ◽  
Mechanistic Studies ◽  
Nmr Studies ◽  
Internal Alkynes ◽  
Chelate Ligands ◽  
In Situ Nmr

The selective synthesis of oxazoles, alkylidene oxazoles, and 1,3-oxazines from N-propargyl carboxamides by choosing gold(III) or gold(I) catalysts and selecting terminal or internal alkynes as substrates is discussed. The mechanistic studies based on labeling experiments and intensive in situ NMR studies indicate an anti-oxyauration step and a proto-deauration with retention of the sterical arrangement at the double bond. The synthetic scope for gold(I) catalysts is very broad, allowing selective conversions to products with properties of chelate ligands, reactions of bromoarenes and the formation of acceptor-substituted oxazoles. With N-heterocyclic carbene (NHC) ligands in the presence of a base, even the vinylgold intermediates of the reactions leading to 1,3-oxazines could be isolated, a reaction with a great potential for future mechanistic studies and future applications of gold catalysis.

scholarly journals Morita-Baylis-Hillman Reaction Inspired [3,3]-Rearrangement of Aryl Iodanes with α,β-Unsaturated Oxazolines

2020 ◽  
Author(s):  
Lei Zhang ◽  
Wangzhen Bao ◽  
Yuchen Liang ◽  
Wenjing Pan ◽  
Dongyang Li ◽  
...  
Keyword(s):  
Selective Synthesis ◽  
Mechanistic Studies ◽  
Reaction Proceeds ◽  
Rearrangement Reaction

Abstract The [3,3]-rearrangement of aryl iodanes with α,β-unsaturated oxazolines has been developed by merging Morita-Baylis-Hillman (MBH) process into the rearrangement reaction. The method allows for the exclusively E-selective synthesis of a wide variety of valuable α-aryl α,β-unsaturated oxazolines which can be difficult to synthesize with other known methods. Experimental and computational mechanistic studies unraveled that the reaction proceeds via the assembly of both coupling partners followed by MBH-type addition to form rearrangement precursor, [3,3]-rearrangement, and stepwise E1cb-elimination. The E-selectivity of the reaction is favored both kinetically and thermodynamically.

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