环甲的

It is prepared from pentachluorobenzonitrile by using KF as fluoride to substitute chlorine in the presence of benzonitrile under high temperature. But owing to the low solubility of KF and rigor synthesis condition, and the parallel auxiliary reactions, the speed of reaction as well as the yield is very low.

五氟苯甲腈的合成开发以五氯苯甲腈为原料在较高的温度下用氟化钾做氟化剂，通过取代苯环上氯原子而得到的，由于氟化钾在溶剂中溶解度低，合成条件要求苛刻，反应速度较慢，同时存在有平行竞争副反应，因而反应收率较低，国内尚无厂家生产。

Methyl 3,6,8-trihydroxy-7-methoxy-1-methylanthraquinone-2-carboxylate is a new COX-2 selective inhibitor isolated from Gladiolus gandavensis.

1-甲基-2-甲氧羰基-3， 6， 8-三羟基-7-甲氧基蒽醌是从唐菖蒲干球茎中分离到的具有环氧化酶-2选择性抑制活性的多取代蒽醌类化合物。

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。

He minim acidity in TS-1 can catalyze the solvolysis reaction of PO to propylene glycol, 1-methoxy-2-propanol and 2-methoxy-1-propanol.

S-1中含有的微量酸中心能够导致环氧丙烷与溶剂反应生成丙二醇、1-甲氧基-2-丙醇和2-甲氧基-1-丙醇。

Using pentaerythritol as initiator, boron trifluoride diethyl etherate as catalyst.dichloroethane as dispersion agent, the chloride polyether polyol is synthesized based on the mechanism of cationic ring-opening polymerization of epiclilnrohyclrin.The azide polyether polyol is synthesized, in DMF through A and sodium azide, and the non-reported azide energetic curing agent is synthesized through the adduction of B and IIDI.

以季戊四醇为起始剂，三氟化硼乙醚为催化剂，1，2—二氯乙烷为分散剂，环氧氯丙烷经阳离子开环聚合反应制成氯化聚醚多元醇，A在N，N—二甲基甲酰胺中与叠氮化钠反应制得叠氮聚醚多元醇，B与六亚甲基二异氰酸酯加成反应制得未见文献报道的叠氮固化剂。

In the presence of alkalinity and tetraethyl ammonium bromide, 2,4-dihydroxy benzophenone reacts with allyl glycidyl ether to form an ethylenic derivative of benzophenone, 2-hydroxy-4-(β-hydroxy-γ-allyloxy) propyloxy benzophenone, which can further undergo hydrosilylation with polyhydromethylsiloxane.

在相转移催化剂四乙基溴化按作用下，利用2，4-二羟基二苯甲酮与烯丙基缩水甘油醚在碱性水溶液中的开环加成反应，合成了中间体4-丙氧基－2-羟基二苯甲酮，将其进一步与聚甲基氢硅氧烷进行硅氢化加成反应。

That 1,4-addition reactions of Grignard agent made from 1-bromo-3-triphenylmethoxyl-1-octene and organozinc agent made from 1-iodo-3-trimethysiloxy-1-octene with 2-(6-methoxylcarbonylhexyl)-4-(2- tetrahydro-pyranyloxy)-2-cyclopentenone both gave prostaglandin 〓 methyl ester statethat prostaglandin E compounds can be prepared by 1,4-addition reaction oforganozinc agent.

最后，研究了溴化-3-三苯甲氧基-1-辛烯基镁和碘化-3-三甲硅氧基-1-辛烯基锌与2-(6-甲氧羰己基)-4-(2-四氢吡喃氧基)-2-环戊烯酮通过1，4-加成反应合成〓甲酯的方法，结果表明，用有机锌试剂通过1，4-加成反应来合成PGE类化合物是可行的。

Cyclization: cyclization occurs at 100℃in polyphosphoric acid for 4h in the mass ratio of 3-(4-methoxyanilino) propionic acid to PPA with 1:8, and 6-methoxy-2,3-dihydro-4-quinolone is formed in 50.5% yield with a method of rapid chromatographic column, c.

成环反应：质量比[3-(4-甲氧苯氨基)丙酸∶多聚磷酸]=1∶8，反应温度为100℃，反应时间4h，柱层析纯化后6-甲氧基-2，3-二氢-4-喹啉酮的收率为50.5％；c。

Their structures were characterized as usnic acid,evinic acid,perlatolic acid,olivetoric acid,2-hydroxyl-4-methoxyl-6-pentyl benzoic acid and 2,4-dihydroxyl benzoic acid,respectively.

结果从太白花的石油醚部分得到6个化合物，分别鉴定为：松萝酸、去甲环萝酸、珠光酸、漂红梅衣酸、2-羟基-4-甲氧基-6-正戊基苯甲酸和2，4-二羟基-6-正戊基苯甲酸。

By magic, each cup of water was forged into a single ring of the mail armor the Circle gave to Calenhad.

通过魔法，每一杯水都被铸造成了一件锁子甲上的一颗圆环，最后法师将这件锁子甲赠与了Calenhad。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了