Histamine, an effective initiator for the synthesis of polysulfides

2020 ◽  
Vol 5 (2) ◽  
pp. 258-262
Author(s):  
Alejandro Cabrera-García ◽  
Rubén Blay-Roger ◽  
Vincent Blay ◽  
Ángel G. Ravelo ◽  
Pedro Martín-Zarza
Keyword(s):  
Primary Amine ◽  
Solvent Free ◽  
Metal Free

A solvent-free and metal-free synthesis of highly pure polysulfides is described using histamine, a primary amine, as an initiator.

ChemInform Abstract: A NHC-Involved, Cascade, Metal-Free, and Three-Component Synthesis of 2,3-Diarylated Fully Substituted Furans under Solvent-Free Conditions.

ChemInform ◽  
2012 ◽  
Vol 43 (6) ◽  
pp. no-no
Author(s):  
Chenxia Yu ◽  
Jun Lu ◽  
Tuanjie Li ◽  
Donglin Wang ◽  
Binbin Qin ◽  
...  
Keyword(s):  
Solvent Free ◽  
Metal Free ◽  
Solvent Free Conditions ◽  
Substituted Furans

REACTION OF SOME SALICYL ALDEHYDE DERIVATIVES WITH AMINES ANDPHENYL ACETYLENE

2020 ◽  
Vol 65 (10) ◽  
pp. 61-66
Author(s):  
Trang Nguyen Thi Minh ◽  
Trang Tran Thi Thu ◽  
Hoan Duong Quoc
Keyword(s):  
Coupling Reaction ◽  
Solvent Free ◽  
Metal Free ◽  
Phenyl Acetylene ◽  
A3 Coupling ◽  
Free Metal

Salicylic aldehydes, amine, and phenyl acetylene could react under the solvent-free, metal-free conditions to form propargylamines 1-4 via A3 coupling reaction. The yield of the reaction was up to 83% for 5h. In acetonitrile, the amine became a catalyst to form 6-bromo-3-(5-bromo-2-hydroxybenzyl)-2-phenyl-4Hchromen-4-one (5). Under microwave conditions, it took about 20 min to complete the reaction and gave the same yields as theconventional method. Structures of these compounds were firm with NMR, MS spectra.

Aminkomplexe des Goldes, Teil 9: Gold(I)-halogenid-Komplexe mit primären und azyklischen sekundären Aminen und ihre Oxidation zu Gold(III)-Derivaten

2018 ◽  
Vol 73 (1) ◽  
pp. 43-74 ◽  
Author(s):  
Cindy Döring ◽  
Peter G. Jones
Keyword(s):  
Hydrogen Bonds ◽  
Structure Analysis ◽  
Secondary Amine ◽  
Primary Amine ◽  
Solvent Free ◽  
Secondary Amines ◽  
Primary Amines ◽  
Direct Reaction ◽  
X Ray

AbstractThe reaction of (tht)AuX (X=Cl or Br; tht=tetrahydrothiophene) with various primary amines L leads to products of the form [L2Au]+X−. Packing diagrams of the corresponding structures are dominated by N–H···X hydrogen bonds and (in some cases) aurophilic contacts. The cyclohexylamine derivative was already known as its dichloromethane ⅔-solvate; we have isolated the solvent-free compound and its pentane ¼-solvate, which all show different packing patterns. With acyclic secondary amines, the products are more varied; LAuX and [L2Au]+[AuX2]− were also found. These gold(I) products were generally formed in satisfactory quantities. The attempted oxidation to Au(III) derivatives with PhICl2 or Br2 proved impossible for the primary amine derivatives [although isopropylamine-trichloridogold(III) was obtained unexpectedly from the corresponding cyanide] and unsatisfactory for the secondary amine derivatives. Products LAuX3 and [L2AuX2]+[AuX4]− were identified but were formed in disappointing yields. In isolated cases protonated products (LH)+[AuCl4]−, (LH+)3[AuCl4]−(Cl−)2 or [(Et2N)2CH]+[AuBr4]− were formed, presumably by involvement of the dichloromethane solvent and/or adventitious water. Here also the yields were poor, and some products arose as mixtures. Direct reaction of amines with AuCl3 or (tht)AuX3 was also unsuccessful. All products were characterized by X-ray structure analysis.

Graphene Oxide: A Metal‐Free Carbocatalyst for the Synthesis of Diverse Amides under Solvent‐Free Conditions

2019 ◽  
Vol 361 (9) ◽  
pp. 2107-2116 ◽  
Author(s):  
Khushbu P. Patel ◽  
Eknath M. Gayakwad ◽  
Vilas V. Patil ◽  
Ganapati S. Shankarling
Keyword(s):  
Graphene Oxide ◽  
Solvent Free ◽  
Metal Free ◽  
Solvent Free Conditions

High-level nitrogen-doped, micro/mesoporous carbon as an efficient metal-free electrocatalyst for the oxygen reduction reaction: optimizing the reaction surface area by a solvent-free mechanochemical method

2019 ◽  
Vol 43 (27) ◽  
pp. 10878-10886 ◽  
Author(s):  
Wendu Zhang ◽  
Jiawei Qi ◽  
Peiyao Bai ◽  
Huifen Wang ◽  
Lang Xu
Keyword(s):  
Porous Carbon ◽  
Mesoporous Carbon ◽  
Reduction Reaction ◽  
Milling Process ◽  
Solvent Free ◽  
Mechanochemical Method ◽  
Nitrogen Doped ◽  
Metal Free ◽  
High Level ◽  
Coconut Mesocarp

Acting as an efficient metal-free ORR electrocatalyst, nitrogen-doped porous carbon derived from coconut mesocarp was prepared by a solvent-free ball-milling process.

Catalytic amounts of CBr4 mediated dehydrogenative coupling of isochromans with aromatic ketones

2015 ◽  
Vol 51 (22) ◽  
pp. 4708-4711 ◽  
Author(s):  
Congde Huo ◽  
Mingxia Wu ◽  
Fengjuan Chen ◽  
Xiaodong Jia ◽  
Yong Yuan ◽  
...  
Keyword(s):  
Solvent Free ◽  
Aromatic Ketones ◽  
Aerobic Conditions ◽  
Metal Free ◽  
Dehydrogenative Coupling

In the presence of catalytic amounts of CBr4 (a metal-free mediator), an unexpected oxidative dehydrogenative coupling of isochromans with ketones occurred to construct new Csp3–Csp3 bonds. The reactions were performed under simple solvent-free aerobic conditions.

A facile and highly convergent approach to thiazolo[3,2-a]pyridines via one-pot multicomponent domino reaction under metal-free and solvent-free conditions

Tetrahedron ◽  
2015 ◽  
Vol 71 (21) ◽  
pp. 3422-3427 ◽  
Author(s):  
Anugula Nagaraju ◽  
B. Janaki Ramulu ◽  
Gaurav Shukla ◽  
Abhijeet Srivastava ◽  
Girijesh Kumar Verma ◽  
...  
Keyword(s):  
Solvent Free ◽  
Domino Reaction ◽  
One Pot ◽  
Metal Free ◽  
Solvent Free Conditions ◽  
Convergent Approach
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