نتایج جستجو برای: اکسیم oxime

تعداد نتایج: 2718  

2009
Wen-Kui Dong Jian-Chao Wu Yin-Xia Sun Jian Yao Jun-Feng Tong

The title compound, C(28)H(28)N(2)O(4), was synthesized by the reaction of 2-acetyl-1-naphthol with 1,4-bis-(amino-oxy)butane in ethanol. The molecule, which lies about an inversion centre, adopts a linear structure, in which the oxime groups and naphthalene ring systems assume an anti conformation. The intra-molecular inter-planar distance between parallel naphthalene rings is 1.054 (3) Å. Int...

2011
Sergey Malinkin Larysa Penkova Vadim A. Pavlenko Matti Haukka Svetlana V. Pavlova

In the title compound, C(8)H(11)N(3)O(2), the oxime and the acetyl groups adopt a transoid conformation, while the pyrazole H atom is localized in the proximity of the acetyl group and is cis with respect to the acetyl O atom. In the crystal, dimers are formed as the result of hydrogen-bonding inter-actions involving the pyrazole NH group of one mol-ecule and the carbonyl O atom of another. The...

2009
Ignez Caracelli Antonio C. Trindade Paulo J. S. Moran Luciana Hinoue Julio Zukerman-Schpector Edward R. T. Tiekink

The title mol-ecule, C(11)H(10)N(2)O(6), has a Z conformation about the C=N bond of the oxime unit. There are significant twists from planarity throughout the mol-ecule, the most significant being between the hydroxy-imino and ester groups which are effectively orthogonal with an N-C-C-O(carbon-yl) torsion angle of 91.4 (2)°. The crystal packing features oxime-benzoyl O-H⋯O contacts that lead t...

2009
Li Xu Lei Wu

In the title compound, C(15)H(13)BrN(2)O(2), he oxime unit adopts an E conformation with respect to the O-H group. A classical intra-molecular O-H⋯N hydrogen bond results in the formation of a six-membered ring. The crystal structure is stabilized by inter-molecular O-H⋯N hydrogen bonds between the hydr-oxy groups and the oxime N atoms. In addition, the crystal structure also features short int...

2009
Lan-Qin Chai Jian Yao Shang-Sheng Gong

In the title centrosymmetric mononuclear copper(II) complex, [Cu(C(8)H(7)BrNO(2))(2)], the Cu(II) atom, lying on an inversion centre, is four-coordinated in a trans-CuN(2)O(2) square-planar geometry by two phenolate O atoms and two oxime N atoms from two symmetry-related N,O-bidentate oxime-type ligands. Inter-molecular C-H⋯O hydrogen bonds link neighbouring mol-ecules into a one-dimensional su...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران - دانشکده علوم 1380

اکسیم ها ترکیباتی با کاربرد سنتزی فراوان هستند که در اغلب ترکیبات دارویی موجود است و حد واسطهای مهمی در شیمی آلی به شمار می رود که از آن جمله اکسیم در تهیه آمین ها و آمیدها را می توان ذکر کرد.برای سنتز اکسیم روشهای مختلفی مورد بررسی قرار گرفت که بالاترین بازدهی در روش استفاده از هیدروکسیل آمین هیدروکلراید و استات سدیم بود.در مرحله بعد تبدیل با آمین با استفاده از معرف های ‏‎nabh4‎‏ در حضور ‏‎nic...

Journal: :Chemical communications 2011
Zhichao Shan Hong Wang Xiangju Meng Siyu Liu Liang Wang Chunyu Wang Fei Li James P Lewis Feng-Shou Xiao

TS-1 crystals with controllable b-oriented length (sheet-like morphology, TS-1-S; chain-like morphology, TS-1-C) have been rationally synthesized from addition of organic additives (urea and fluorinated surfactant of FC-4) in the starting titanosilicate gels, and catalytic and adsorptive measurements show that TS-1-S samples are very active in Beckmann rearrangement of cyclohexanone oxime, wher...

2015
Takuya Yamaguchi Yasuhisa Asano

Bacillus sp. OxB-1 has been characterized as a strain that produces a new enzyme, aldoxime dehydratase, which catalyzes the dehydration of aldoxime to form nitrile. Here, its complete genome sequence (3,594,618 bp, with a GC content of 47.85%), comprising a circular chromosome, is announced.

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2001
T Grüning W G Franke

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