نتایج جستجو برای: imine formation

تعداد نتایج: 529667  

2009
Serap Yazıcı Ferda Erşahin Erbil Ağar İsmet Şenel Orhan Büyükgüngör

The title compound, C(13)H(10)ClNO(2), exists in the phenol-imine form in the crystal, and the aromatic rings are oriented at a dihedral angle of 2.82 (9)°. An intra-molecular O-H⋯N hydrogen bond results in the formation of a planar six-membered ring. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into chains.

Journal: :Organic & biomolecular chemistry 2011
Davor Šakić Hendrik Zipse Valerije Vrček

Electronic structure methods have been applied to calculate the gas and aqueous phase reaction energies for base-induced rearrangements of N-chloropiperidine, N-chloro-3-(hydroxymethyl)piperidine, and N-chloro-4-(4-fluorophenyl)-3-(hydroxymethyl)piperidine. These derivatives have been selected as representative models for studying the chemical fate of environmentally relevant chloramines. The p...

2009
Jian-Cheng Zhou Chuan-Ming Zhang Nai-Xu Li Zheng-Yun Zhang

The title compound, C(18)H(12)N(2)O, crystallizes in a phenol-imine tautomeric form with a Z conformation for the imine functionality. The dihedral angle between the aromatic rings is 8.98 (9)°. A strong intra-molecular O-H⋯N hydrogen-bond inter-action between the hydroxyl group and imine N atom occurs.

2017
Xinyun Liu Johnny H Phan Benjamin J Haugeberg Shrikant S Londhe Michael D Clift

A new method for imine synthesis by way of quinone-catalyzed oxidative deformylation of 1,2-amino alcohols is reported. A wide range of readily accessible amino alcohols and primary amines can be reacted to provide N-protected imine products. The methodology presented provides a novel organocatalytic approach for imine synthesis and demonstrates the synthetic versatility of quinone-catalyzed ox...

2018
Minako Nagatome Yuki Kondo Daisuke Kadowaki Yusuke Saishyo Mitsuru Irikura Tetsumi Irie Yoichi Ishitsuka

Acetaminophen, a common analgesic/antipyretic, is a frequent cause of acute liver failure in Western countries. The development of an effective cure against acetaminophen hepatotoxicity is crucial. Ethyl pyruvate, an ethyl ester derivative of pyruvic acid, has been identified as a possible candidate against acetaminophen hepatotoxicity in animal experiments. However, the mode of the hepatoprote...

Journal: :Chemical communications 2015
Ana Cajaraville Jaime Suárez Susana López Jesús A Varela Carlos Saá

A novel and mild Rh(III)-catalyzed [5+1] oxidative cycloaddition between arylguanidines and alkynes efficiently affords C4-disubstituted 1,4-dihydroquinazolin-2-amines. Members of this family of heterocycles, which contain the relevant cyclic guanidine units, have shown interesting pharmacological properties. The mechanism probably involves the formation of an eight-membered rhodacycle in which...

2011
Erwan Le Gall Antoine Pignon Thierry Martens

A practical route to tertiary diarylmethylamides or -carbamates from imines, organozinc reagents and acyl chlorides or chloroformates is described. This route involves the formation of an imine, which is used without isolation, followed by its activation by the carbonyl-containing electrophile and the trapping of the acyliminium by an organozinc reagent. Most steps are conducted concomitantly t...

Journal: :Angewandte Chemie 2016
Michael Kathan Petr Kovaříček Christoph Jurissek Antti Senf Andre Dallmann Andreas F Thünemann Stefan Hecht

Various aldehyde-containing photoswitches have been developed whose reactivity toward amines can be controlled externally. A thermally stable bifunctional diarylethene, which in its ring-closed form exhibits imine formation accelerated by one order of magnitude, was used as a photoswitchable crosslinker and mixed with a commercially available amino-functionalized polysiloxane to yield a rubbery...

Journal: :Journal of the American Chemical Society 2008
Guilong Li Frank R Fronczek Jon C Antilla

The enantioselective addition of alcohols to imine electrophiles has been shown to proceed in the presence of a catalytic amount of a chiral phosphoric acid catalyst. The reaction allows for the formation of the respective chiral N,O-aminals in excellent yield and enantioselectivity. A total of 11 different alcohols and 11 different imines were successfully used as a clear demonstration of the ...

2015
Lei Hu Yang Zhang Olof Ramström

An organogelator was produced and identified from a dynamic imine system, resolved and amplified by selective gelation. The formation of the organogel was monitored in situ by (1)H NMR, showing the existence of multiple reversible reactions operating simultaneously, and the redistribution of the involved species during gelation. The formed organogelator proved effective with a range of organic ...

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