نتایج جستجو برای: 4 tetrazole pat

تعداد نتایج: 1306900  

Journal: :The Journal of organic chemistry 1997
Valentin Wittmann Chi-Huey Wong

An improved procedure is described for the efficient and high-yield (76-91%) synthesis of nucleoside diphosphate sugars from the readily available nucleoside 5'-monophosphomorpholidate and sugar 1-phosphate in the presence of 1H-tetrazole. Comparative kinetic investigations by means of (31)P NMR spectroscopy with different additives (1,2,4-triazole, acetic acid, N-hydroxysuccinimide, 4-(dimethy...

سعیدی ساعدی, حمید, صالحی, زیور, قاسم‌زاده قزوینی, معصومه,

چکیده مقدمه: سرطان پستان افزون شدن بدخیم سلول‌های اپی‌تلیالی مجاری یا لوب‌های پستان است. انباشتگی آسیب‌های DNA به‌عنوان عاملی مهم در بروز سرطان پستان است. یکی از مهم‌ترین سازوکار‌های دفاعی، راه بازسازی برداشت نوکلئوتیدی (NER) است. آشفتگی در بیان ژن‌های ترمیم  DNAنقش مهمی در سرطان‌زایی پستان ایفا می‌کند. XPC(Xeroderma pigmentosum, complementation group C) ژنی مهم در مسیر NER است که به شناسایی آس...

Journal: :Acta Crystallographica Section E Structure Reports Online 2012

Journal: :Journal of the American Chemical Society 2012
Ping Cui Yu-Guang Ma Huan-Huan Li Bin Zhao Jian-Rong Li Peng Cheng Perla B Balbuena Hong-Cai Zhou

A zeolite-like microporous tetrazole-based metal-organic framework (MOF) with 24 nuclear zinc cages was synthesized and characterized. It exhibits high CO(2) adsorption capacity up to 35.6 wt % (8.09 mmol/g) and excellent CO(2)/CH(4) selectivity at 273 K/1 bar, being among the highest values known to date. Theoretical calculations based on simulated annealing techniques and periodic DFT reveale...

Journal: :Dalton transactions 2013
Ru-Xin Yao Ying-Lian Qin Fang Ji Yan-Fei Zhao Xian-Ming Zhang

Three novel tetrazole-based frustrated magnets, namely, Co3(OH)2(3-ptz)2(SO4)(H2O)4 (1), Co2(OH)(tzba)(H2O)4 (2) and [Co(OH)(tta)] (3) (3-ptz = 5-(3-pyridyl) tetrazole, H2tzba = 4-(1H-tetrazol-5-yl) benzoic acid, Htta = 1H-tetrazole) were hydrothermal synthesized and magnetically characterized. Compound 1 is a 2D (4,4) layered structure assembled by sulfate capped triangular [Co3(μ3-OH)(μ3-SO4)...

Journal: :The Journal of organic chemistry 2013
Tatyana S Shestakova Zakhar O Shenkarev Sergey L Deev Oleg N Chupakhin Igor A Khalymbadzha Vladimir L Rusinov Alexander S Arseniev

The selectively (15)N labeled azido-1,2,4-triazine 2*A and azidopyrimidine 4*A were synthesized by treating hydrazinoazines with (15)N-labeled nitrous acid. The synthesized compounds were studied by (1)H, (13)C, and (15)N NMR spectroscopy in DMSO, TFA, and DMSO/TFA solutions, where the azide-tetrazole equilibrium could lead to the formation of two tetrazoles (T, T') and one azide (A) isomer for...

Journal: :Pediatric diabetes 2007
Michael J Haller Jennifer Stein Jon Shuster Douglas Theriaque Janet Silverstein Desmond A Schatz Michael G Earing Amir Lerman Farid H Mahmud

OBJECTIVES To assess the ability of reactive hyperemia-peripheral artery tonometry (RH-PAT) to serve as a surrogate marker of endothelial dysfunction in children with type 1 diabetes (T1D). RESEARCH DESIGN AND METHODS Forty-four children with T1D [age 14.6 +/- 2.7 yr; duration of diabetes 6.01 +/- 4 yr; range of diabetes duration 1-16 yr; and hemoglobin A1c (HbA1c) 8.34 +/- 1.2%] and 20 child...

Masoud Saleh,

Six years experience of blunt abdominal trauma leading to small intestine Perforation in Logh­rnan-e-Hakim Medical center. Between Sept. 1982 to Sept. 1988, 24 cases of abdominal blunt trauma leading to perforation of small intestine were managed at Loghman-e-Hakim Medical center. All the cases were treated surgically either by debridment and repair or resection and anas­tomosis, with no mortal...

Journal: :Molbank 2021

The ongoing study is a Ugi-azide four-component reaction for the synthesis of 1,5-disubstituted tetrazole(1,5-DST), which involves an aldehyde, different amines, isocyanides, and as azide’s source Trimethylsilylazide (TMSN3), in water solvent using catalyst tetradecyltrimethylammonium bromide (TTAB) with load (10% mole), provides hydrophobic micellar site. This approach step toward green chemis...

Journal: :Organic & biomolecular chemistry 2011
Adam R Ellwood Michael J Porter

Treatment of primary or secondary alcohols with 1-phenyl-1(H)-tetrazole-5-thiol and [Me(2)NCHSEt](+) BF(4)(-) leads directly and cleanly to 1-phenyl-1(H)-tetrazol-5-yl sulfides.

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