查询词典 methyl group

Photoinduced Electron Transfer [2+2] Cycloaddition Reactions ofBenzannelated Isoquinolin-1-ones with Electron Deficient Alkenes Photoinduced [2+2] cycloaddition reactions of 11H-benzoxazolo[3,2-b]isoquinolin-11-one 8 and 11H-benzothiazolo[3,2-b]isoquinolin-11-one 13 with electron deficient alkenessuch as acrylonitrile, methyl acrylate, dimethyl fumarate and dimethyl maleate afforded a group of polycyclic isoquinoline derivatives bearing cyclobutane moieties ingood to excellent yields and resulted in the Schenck isomerization of the alkenes.

3苯并增环异喹啉-1-酮与缺电子烯烃的光诱导电子转移[2+2]环加成反应 11H-苯并恶唑[3，2-b]异喹啉-11-酮8和11H-苯并噻唑[3，2-b]异喹啉-11-酮13与缺电子烯烃如丙烯腈，丙烯酸甲酯，富马酸二甲酯及马来酸二甲酯的光诱导[2+2]环加成反应以高产率给出一系列含有环丁烷结构单元的多环异喹啉衍生物并导致烯烃的Schenck异构化作用。

Cows in group 2(6 cases ) were given intramuscularly 4 mg 15 methyl-PGF2α.

第二组(6头)，一次肌注4mg15甲基前列腺素F_(2α)15甲基PGF_

Study on different methods of iodomethane s preparation;2. The carbonyl group of DMC is formed by CO_2 insertion, and the two methyl groups of DMC are from methanol and iodomethane , respectively.

结果表明，固体碱碳酸钾催化剂直接参与了DMC的合成过程，DMC分子中的羰基由CO2插入甲醇后形成，两个甲基分别来源于甲醇和碘甲烷。

The production method as defined in claim 7, wherein the alcohol is selected from the group consisting of methyl alcohol, ethyl alcohol, isobutyl alcohol and mixtures thereof.

生产方法所界定的索赔七，其中，酒精是选自小组，甲醇，乙醇，异丁醇及其混合物。

As mercapto -function group has strong sorption on methyl mercury, an experiment was conducted to reveal the effect of the substances containing mercapto -groups on transfer and transform of mercury in soil by adding wool whose decomposed products consisting of abundant mercapto -composition.

巯基对汞特别是甲基汞有强烈的吸附作用，本试验通过对土壤添加富含巯基官能团的羊毛，初步研究含巯基物质在土壤环境中对土壤汞迁移转化作用的影响。

The fact that the compound, 2-methyl-2-di- methylaminomethyl-5--n-pentylidenecyclo- pentanone hydrochloride (T60) possessed little anticancer activity indicated that the Mannich bases that could formed a methylene group were necessary for anticancer activity.

当环戊酮环上的Mannich碱侧链位置上引入取代基时，抗癌活性显著降低，如化合物2-甲基-2-二甲胺甲基-5--亚戊基环戊酮盐酸盐（T60）几乎无抗癌活性。这说明Mannich碱能形成亚甲基是这类化合物产生抗癌活性所必不可少的条件。

Said invention utilizes the control of sulfonation extent of polystyrene sulfoacid membrane and distribution of sulfoacid group to implement modification or polystyrene sulfoacid membrane, on the primise of that the protein conductivity of the membrane is not affected, the permeability of the methyl alcohol in the membrane is reduced, and the alcohol-resistance of membrane material is raised.

通过控制聚苯乙烯磺酸膜的磺化程度和磺酸基团的分布状况来对聚苯乙烯磺酸膜进行改性，在不影响膜的质子传导性能的前提下，降低了甲醇在膜内的渗透率，提高了膜材料的阻醇性能。

The Fe(superscript 2+) activated sulphonated carbon material prepared by the hydrothermal method exhibited remarkable catalytic performance for the degradation of methyl orange (the degradation efficiency could reach above 79%) and pH=2.4-3.2 in the reaction system was observed, which should be attributed to the introduction of SO3 H group.

反应过程中溶液的pH=2.4~3.2，在碳材料中引入-SO3H基实现了固体酸代替液体酸的目的。

Alternatively, the chlorine-containing compound may comprise a compound selected from the group consisting of ammonium chloride, methyl ammonium chloride, tetramethylammonium chloride, tetraethylammonium chloride, and combinations thereof.

或者，所述含氯化合物可包括选自氯化铵、氯化甲基铵、氯化四甲基铵、氯化四乙基铵和它们的组合的化合物。

The results showed that the addition leading to -2-phenyl-2-(2-vinylpiperidin-1-yl) ethanol 7 could proceed with good diastereoselectivity and excellent yield (95%).(3) The selective N-deprotection of -2-phenyl-2-(2-vinylpiperidin-1-yl) ethanol 2 without affecting the vinyl group in the substrate were untaken.(4) The Zip reaction for the transformation of -1-(3-aminopropyl)-3-methylazecan-2-one 8 to -7-Methyl-1, Sdiaza-cyclotetradecan-6-one 9 were undertaken. The results showed that, under controlled conditions, acceptable yields (43%) could be achieved and racemization can be minimized during the ring expansion reaction.

该合成路线与文献方法相比，反应条件较温和，也缩短了反应时间；(2)哌啶衍生物2与乙烯基格氏试剂进行加成反应的条件和立体选择性，取得了较好的结果（差向异构体比为80：20，产率95％左右）；(3)不饱和哌啶衍生物7在不影响碳碳双键的情况下去除苯基甘氨醇手性辅助基的条件；(4)具有羰基α位手性的氨基酰胺8在不同条件下经Zip重排反应转变为9的反应，控制反应条件，可使反应中消旋化减小到最小的程度。

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。