نتایج جستجو برای: mild conditions

تعداد نتایج: 951043  

Journal: :Organic & biomolecular chemistry 2013
Koujiro Tambara G Dan Pantoş

A series of Pd(en)X2 salts were used as catalysts for the conversion of aldoximes into nitriles and amides. Highlights of this protocol include the use of inexpensive polar solvents, including water, and moderate reaction temperatures. A high degree of selectivity in the reaction outcome was observed when using aliphatic vs. aromatic/conjugated aldoximes.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده فنی 1390

استفاده از سینتیک تفصیلی در عین پرهزینه و زمان گیر بودن، در بسیاری از شبیه سازی های احتراقی کاربرد دارد. الگوریتم isat یا جدول سازی درجای تطبیق پذیر یک روش مناسب برای کاهش زمان و هزینه محاسبات با استفاده از سازوکار شیمیایی تفصیلی در جریان های واکنشی است. در این پژوهش، الگوریتم isat جهت کاهش زمان شبیه سازی احتراق توسط کد با متن باز openfoam بر حلگر احتراقی reactingfoam اعمال شد. جهت بررسی پارامت...

2013
Z. Kh. PAPANYAN

Introduction. Cysteine is the one of the sulfur containing non-essential amino acids along with methionine, which are found naturally in many proteins such as α and β-ceratins, and in free state. The ability of cysteine residues to form disulfide bridges plays an important role on secondary structure and folding of proteins. Another prominent quality is that sulfur can be found in different oxi...

Journal: :Chemical communications 2014
Ying-Xiu Li Lian-Hua Li Yan-Fang Yang Hui-Liang Hua Xiao-Biao Yan Lian-Biao Zhao Jin-Bang Zhang Fa-Jin Ji Yong-Min Liang

A direct nitration of aromatic sulfonamides using sodium nitrite as the nitrating agent has been developed. The reaction shows typically mono-substitution selectivity and can be enlarged to the gram scale with good yield.

Journal: :Chemical communications 2008
Maria J Petersson Wendy A Loughlin Ian D Jenkins

Bis-phosphine oxides can be selectively reduced to bis-phosphine monoxides under exceptionally mild conditions using triflic anhydride and a thiol.

2011
Lizhen Chen Zhenbin Fan

We prove new existence results of mild solutions to fractional differential equations with nonlocal conditions in Banach spaces. The nonlocal item is only assumed to be continuous. This generalizes some recent results in this area.

Journal: :Chemical communications 2008
Akihiro Goto Kohei Endo Yu Ukai Stephan Irle Susumu Saito

An aldol-type reaction of organonitriles with aldehydes was catalyzed by a RhI(OR) species under ambient conditions, and the reaction displayed a broad substrate scope with respect to both organonitrile and aldehyde components.

Journal: :bulletin of the iranian mathematical society 0
y‎. ‎y‎. zhang lmib & school of mathematics and systems science‎, ‎beihang university‎, ‎beijing‎, ‎100191‎, ‎china. y‎. ‎y‎. zhang lmib & school of mathematics and systems science‎, ‎beihang university‎, ‎beijing‎, ‎100191‎, ‎china. y‎. ‎y‎. zhang lmib & school of mathematics and systems science‎, ‎beihang university‎, ‎beijing‎, ‎100191‎, ‎china.

in this paper, we consider a class of time-dependent neutral stochastic evolution equations with the infinite delay and a fractional brownian motion in a hilbert space. we establish the existence and uniqueness of mild solutions for these equations under non-lipschitz conditions with lipschitz conditions being considered as a special case. an example is provided to illustrate the theory

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2013
ghodsi mohammadi ziarani somayeh mousavi negar lashgari alireza badiei monireh shakiba

1,8-dioxo-decahydroacridines have been synthesized by the three-component reaction of aromatic aldehydes, aromatic amines (or ammonium acetate), and dimedone in the presence of sulfonic acid functionalized nanoporous silica (sba-pr-so3h) under solvent-free conditions. excellent yields, short reaction times, mild reaction conditions, and easy work-up procedures are advantages of this green method.

Journal: Nanochemistry Research 2019

This study was conducted to investigate the use of cubic LaMnO3 nano-perovskite as a green catalyst for the degradation of an aqueous solution of methyl orange under different conditions. Nanoscale cubic lanthanum manganite with the particle size of ~20 nm was successfully synthesized via citrate sol-gel method. The sample was characterized using the FT-IR and UV-Vis spectroscopy, XRD, SEM, and...

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