查询词典 acetophenone-p-phenetidine

CAR has high stereoselectivity for aromtic ketones such as acetophenone,2'-chloroacetophenone, 3'-chloroacetophenone, 4'-chloroacetophenone, 3-chloropropiophenone and2-chloro-2',4'-difluoroacetophenone.

羰基还原酶对芳香酮类化合物具有很高的立体选择性，对苯乙酮、2'-氯-苯乙酮、3'-氯-苯乙酮、4'-氯-苯乙酮、3-氯-1-苯丙酮和2-氯-2'，4'-二氟苯乙酮还原产物的e.e。

The separate factor between S--α-phenyl ethylamine and acetophenone for all polymers was above one,and the maximum ofαwas 2.86.This indicated that all polymers had good selection.

各种印迹聚合物对于S--α-苯乙胺及其结构类似物苯乙酮的分离因子均大于1，最大达到2.86，显示出了很好的选择性。

Further treatment of the Ru nanoparticles with chiral modifier (1S, 2S)-1, 2-diphenyl-1, 2-ethylene-diamirse (1S, 2S-DPEN and KOH in ionic liquid/i-PrOH mixed solvent resulted in a novel immobilized chiral catalyst which can asymmetrically hydrogenate acetophenone and its derivatives.

将此钌纳米粒子与(1S， 2S)-1，2-二苯基乙二胺（简称(1S， 2S)-DPEN）、KOH在离子液体／异丙醇介质中原位生成一种不对称加氢催化剂，用于催化苯乙酮及其衍生物的不对称加氢反应。

Shannon: Tieguanyin in hypertrophy in fresh leaves, containing more high boiling point (200 degrees c) of the aroma substances, such as linalool, acetophenone, etc.; more nerolidol, indole , then the formation of Yun Xiang.

香：在肥厚的铁观音鲜叶中，含有较多的高沸点（200度c）的香气物质，如芳樟醇、苯乙酮等；较多的橙花叔醇、吲哚，则形成韵香。

Benzyloxy benzoyldimethylsulfoxide was prepared by the reaction of ethyl 4-benzyloxybenzoate and dimethyl sulfoxide in the presence of sodium hydride, followed by Pummerer reaction with concentrated hydrochloric acid to afford eo-hydroxy-co-thio-methyl-(4/-benzyloxy) acetophenone, which reacted with urea, thiosemicarbazide, semicarbazide hydrochloride and o-phenylenediamine to give imidazolidine-2,4-dione, l,2,4-triazine-3- one and quinoxaline derivatives, respectively.

本文用4-苄氧基苯甲酸乙酯和二甲亚砜为原料，在氢化钠存在下反应，合成了(4′-苄氧基)-苯甲酰基-二甲亚砜。研究了该亚砜在浓盐酸的存在下发生的Pummerer重排反应，用重排产物ω-羟基-ω-甲硫基-(4′-苄氧基)-苯乙酮分别与尿素、氨基脲、氨基硫脲和邻苯二胺反应合成了2，4-咪唑啉-二酮、1，2，4-三嗪-3-酮、喹喔啉等含氮杂环化合物。

Ascorbic acid, a well-known natural antioxidant, was successfully used to remove the sulfonyl group of α-phenylsulfonyl acetophenone derivatives by photochemical method.

抗坏血酸作为众所周知的天然抗氧化剂，在光诱导电子转移反应中被成功地运用到α-苯磺酰基苯乙酮衍生物磺酰基基团的移除反应中。

Yields from chiral bisoxazolines (5a) with diethyl oxalate using NaOCH〓 as base for the first time. The structures of chiral multioxazolines and their intermediates, multi (β-hydroxylamide) s, were characterized by 〓H NMR, IR, mass spectra and elemental analysis. The catalytic activities and enantioselectivities of chiral multi (β-hydroxylamide) s (4) and chiral multioxazolines (5～8) were investigated by using acetophenone and β-acetonaphthone as former chiral ketone, KBH〓 or NaBH〓 as reductive reagent in chapter three.

在此基础上，对合成方法作了创新，以羧酸或酯为原料，在无催化剂的条件下与手性α-氨基醇反应，通过回流分水或脱醇的方法，一步反应合成了手性多噁唑啉（5～8），产率为89.2%～98.4%；以手性双噁唑啉（5a）为原料，在NaOCH〓的作用下，与草酸二乙酯反应，首次合成了呋喃类双嗯唑啉（6a），产率为72.9%～75.6%。

The eight VOCs were acetophenone, phenol, benzotrichloride, 1, 3-butadiene, chlorobenzene, methanol, methyl chloroform and methylene chloride. They were mixed together with very low concentrations.

所测定的八种VOCs为苯乙酮，苯酚，三氯甲苯，1，3丁二烯，氯苯，甲醇，三氯代乙烷和二氯甲烷。

Study on an efficient process for the preparation of trifloxystrobin starting from 2-methylacetophenone bypartial oxidation,esterification,reaction with methoxyamine,bromization and condensation with 3'- acetophenone oxime.

以邻甲基苯乙酮为原料，经过高锰酸钾的碱性氧化，甲醇酯化，再与甲氧基胺盐酸盐肟化后，用N-溴丁二酰亚胺溴化，最后和间三氟甲基苯乙酮肟缩合得到目标产物肟菌酯。

In recent years, the new technology has been used in the synthesis of chalcone compounds, under the 343 K condition carrying on the response in the temperature. It takes benzaldehyde and acetophenone as raw material, BF4 as resolver and the hydrotalcite as the catalyst, the yield of chalcone can reach 98.5%. This method has some advantages including shorter reaction time, higher yield and simpler operation.

近年来查尔酮化合物的合成采用了新技术，是以苯甲醛和苯乙酮为原料，BF4作为反应溶剂，水滑石为催化剂，在温度为343 K的条件下进行反应，查尔酮产率可以达到98.5%，该法具有反应时间短、操作简便、收率高等优点。

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。