查询词典 acetophenone-p-phenetidine

Acetophenone cylic ethylic ketal was synthesized by using acetophenon e and glycol as reactants,and rare-earth solid superacid SO 2- 4-La 3 +/TiO 2 as c atalyst.Factors affecting the product yield were investigated.

以稀土固体超强酸SO2 -4-La3 +/TiO2 为催化剂，苯乙酮和乙二醇为原料催化合成苯乙酮环乙二缩酮，并考察了影响反应的因素。

In order to achieve a rapid and accurate selection for extractive distillation solvent, and to acquire 1,2,3-trimethylbenzene with high purity from solvent oil via extractive distillation, the UNIFAC model was used to calculate the relative volatility of 1,2,3-trimethylbenzene to indane (the mass ratio of 1,2,3-trimethylbenzene to indane is 4∶1) in five different solvents, acetophenone, di-2-octylhexyl phthalate, glycol, dimethyl sulfoxide,sulfolane at 17.47 kPa.

为了快速准确地选择萃取精馏溶剂，由190#溶剂油萃取精馏获取高纯度连三甲苯，运用UNIFAC模型，计算了质量比为4∶1的连三甲苯-茚满体系在苯乙酮、乙二醇、邻苯二甲酸二辛酯、二甲基亚砜和环丁砜5种溶剂中在17.47 kPa下的相对挥发度。

The results show that calix[6] arene-bismetalloporphyrins possess much higher catalytic activity than the corresponding metalloporphyrin while displaying the sam eselectivity by giving rise to acetophenone as the ketonic component in excellent yield.

研究了杯[6]芳烃-双金属卟啉在氧化异丙苯中的催化行为，结果表明杯[6]芳烃-双金属卟啉比之相应的金属卟啉具有更高的催化活性，并表现同样的选择性，生成苯乙酮和醇组份。

The first synthetic route uses 1,2,4-trimethoxybenzene and chloroacetonitrile in forming 2,4,5-trimethoxy-a-chlor-acetophenone under the anhydrous condition, then the intermediate condensates with papaverine forming the core pyrro[2,l-a]isoquinoline, followed by formation and lactonization to form the lactone ring. The second synthetic route uses prepared aldehyde with prepared ethyl nitroacetate by Knoevenagel condensation to obtain 2-Nitro-3-(2,4,5-tris-methoxy-phenyl)-acrylic acid ethyl ester and 2-Nitro-3-(2,4,5-tris-benzyloxy -phenyl)-acrylic acid ethyl ester etal intermediates. The lamellarin skeleton could arise from condensation of the papaverine and these intermediates by Michael reaction, the ester group is provided for subsequent lactonization. The third synthetic route uses coumarin or indan-l,3-dione derivatives and papaverine to form lamellarin under basic conditions.

第一条路线首先从1，2，4-三甲氧基苯出发与卤乙腈作用合成卤代芳酮中间体，然后与罂粟碱反应合成开链片螺素，最后经乙酰化、去保护、成内酯环得到片螺素；第二条路线由制备的芳醛和制备的硝基乙酸乙酯经缩合得到2-硝基-3-芳基丙烯酸乙酯，然后由该中间体与罂粟碱反应，在完成关环的同时也引入酯基，最后去保护、成内酯环得到片螺素；第三条路线是由香豆素或茚二酮出发，经溴代后的中间体与罂粟碱反应，得到片螺素的基本框架。

The α-monobromination of 2-pentone,4-methyl acetophenone,4-methoxyacetophenone,6-methoxy-2-acetylnaphthane,2,2,5,5-tetramethyl-3-hexanone,cyclooctanone,cyclododecanone with respectively,were studied.

研究了离子液体三溴化1-丁基-3-甲基咪唑[Br3]对2-戊酮、4-甲基苯乙酮、4-甲氧基苯乙酮、6-甲氧基-2-乙酰基萘、2，2，5，5-4-甲基-3-己酮、环辛酮、环十二酮、丁醛等羰基化合物的α-溴化反应。

Five chalcones were synthesized via the aldol condensation reaction of acetophenone or parasubstituted acetophenones with 1-phenyl-3-methyl-5-phenoxyl-pyrazol-4-aldehyde, which reacted with two kinds of hydrazine in glacial acetic acid under refluxing to give a series of bipyrazoline derivatives. In this synthetic course, glacial acetic acid is not only a solvent, but also a catalyzer.

以1-苯基－3-甲基－5-苯氧基－吡唑-4-甲醛为原料，与苯乙酮发生羟醛缩合，生成相应的查尔酮，再在冰醋酸中与不同的肼反应，高产率的合成出10种新的5位含1-苯基－3-甲基－5-苯氧基－吡唑基的吡唑啉类衍生物。

The results of asymmetric reduction of latent chiral ketones by carbonyl reductase showed that the enzyme had a high specificity for pentanone in aliphatic ketones and for the acetophenone derivates that contained a withdrawing group at α-position.

利用羰基还原酶不对称催化还原潜手性酮类化合物发现，对于芳香酮类化合物，酶对α位为强电负性基团的底物专一性较强；对于脂肪酮类化合物，酶对五碳脂肪酮的专性较高。

The famciclovir was synthesized from purine by a series of steps by Acylation, Decarboxylation, Reduction ,and so on; Derivatives of these intermediates is described from the 6-chloro- 9H- purin-2-amine as raw materials in different conditions when the iodine and bromide were synthesized with the addition of two intermediate 6-bromo-9H-purin-2-amine and 6-iodo-9H-purin-2-amine; There is elaborated from the main part of a acetophenone, urineaminohydrochloride, phenylhydrazine, ethyl acetoacetate as raw material through a series of reactions to synthetic 3-phenyl-4-formylphenyl pyrazole and 5-chloro-3-methyl-1-phenyl-1H-pyrazole-4-aldehyde two pyrazole aldehyde, and then with 2-amino-6-chlorine-9-(2-methicillin-oxo-co-methyl-4-yl) purine reaction of the two new pyrazole purine Schiff bases.

本论文主是采用以鸟嘌呤为原料，经过一系列的酰基化，脱羧，还原等反应作用下最终得到了产物2-氨基-9-(4-乙酰氧基-3-乙酰氧基甲基丁基)嘌呤；其中的中间体衍生物主要是阐述从以2-氨基-6-氯鸟嘌呤为原料通过在不同的条件下进行溴代与碘代分别合成了另外两种中间体2-氨基-6-溴鸟嘌呤及2-氨基-6-碘鸟嘌呤；还有一部分主要是阐述从以苯乙酮，盐酸氨基脲，苯肼，乙酰乙酸乙酯为原料通过一系列的反应先合成3-苯基-4-醛基吡唑及5-氯-3-甲基-1-苯基-1H-吡唑-4-甲醛这两个吡唑醛，然后再与2-氨基-6-氯-9-(2-甲氧羰基丁酸甲酯-4-基)嘌呤反应得到了两个新型的吡唑嘌呤席夫碱

Four chalcones were synthesized by aldol condensation reaction of acetophenone or para-substituted acetophenones with 2-phenyl-1,2,3-triazol-4-carboxaldehyde, which reacted with three hydrazines in glacial acetic acid under refluxing to give a series of pyrazoline derivatives.

以2-苯基－1，2，3-三唑基－4-甲醛为原料，与苯乙酮［或取代苯乙酮(1a~1d)］发生羟醛缩合，生成相应的查尔酮(2a~2d)，再与不同的肼反应，合成了12种新的5位含2-苯基－1，2，3-三唑基的吡唑啉衍生物3a~3d，4a~4d，5a~5d。

And good recycle activity and retained enatioselectivity for acetophenone were obtained for the sixth run (93%; 95%ee) while the water was degassed and the reaction was conducted under argon.

当反应使用脱气蒸馏水，在氩气保护下进行时，催化剂第六次使用，转化率仍高达93％，对映选择性一直保持不变（95％ee）。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。