Bis(1,2,3,4-tetrahydroisoquinoline-2-ylmethyl) HBr salt (K2) guest has been synthesized from 1,2,3,4- tetrahydroisoquinoline and ethylenedibromide. The self-assembly interaction models of cucurbit[8]uril (Q[8]) with this synthetic guest have been investigated by using 1H NMR technique, single crystal X-ray diffraction determination and theoretic calculation method.

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0 G of cyclopentyl bromide and 19.4 g of magnesium are reacted in ether or THF to give a cyclopentyl Grignard reagent.

一百十九點(diǎn)零克的環(huán)戊基溴或溴環(huán)戊烷和十九點(diǎn)四克的鎂在乙醚或四氫呋喃中產(chǎn)生反應(yīng)美国无码Av免费自慰，形成一個(gè)環(huán)戊格氏試劑欧美一级AAAAAA片在线看。

The results showed that the unsaturated fatty acid content of pecan kernel oil was 89 0%,and 13 kinds of unknown components such as nonadecaol,8 hexyl pentadecane,10 methyl eicosane,11,14 eicosadienoic acid,1 bromo 8 heptadecyne,9 hexyl heptadecane,tetracosane,13 docosenoic acid,1 bromo 7 nonadecyne,15 tetracosenoic acid,hexacosanoic acid,7 hexyl ei...

研究結(jié)果表明：山核桃仁油中的不飽和脂肪酸 w =89 0 %，未知成分是十九醇日本AAAAA片爽快免费中国、8 己基十五烷黄色手机黄色网站在线播放、10 甲基二十烷、11国产高清黄色网，14 二十碳二烯酸自拍高潮日韩在线观看、1溴 8 十七炔、9 己基十七烷国产丰满成熟女性性高潮视频、二十四烷、13 二十二碳烯酸一级性爱c、1 溴代 7 十九炔中文欧美在线、15 二十四碳烯酸、二十六酸中国产精品国产三级、7 己基二十烷免费美女黄、二十七烷共 13種，其中13 二十二碳烯酸真人黄色视频免费的、15 二十四碳烯酸特黄一级免费视频、十九醇等具有較強(qiáng)的生理活性和藥用價(jià)值

Seven of them have not been reported.Their structures were confirmed by IR,~1HNMR,MS,and element analysis. 4.Meanwhile,the green methylation procedure of imides was developed by using dimethyl carbonate as methylation reagent.A series of imides,for example,phthalimide,3,4-dibromo-maleimide and succincide were used for substrates.The effects of DABCO(1,4-diazabicyclo [2.2.2]octane)and DBU(1,8-diazabicyclo[5.4.0]undec-7-ene)as a catalyst in this kind of reactions were investigated.2-Bromo-3-(1-methylindolyl-3-yl)-1-methyl-1H-pyrrole-2,5-dione was prepared by using dimethyl carbonate,which further expanded the use of dimethyl carbonate,as a green agent in organic synthesis.

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Propargyl alcohol was protected by dihydrophran with the catalysis of PPTS ,and then reacted with Ethyl Mag bromide to prepare its corresponding Grignard reagent.

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In the presence of the phase transfer catalysts such as tetramethylammonium bromide, tetraethylammonium bromide or polyethylene glycol(MW 400 and 6,000),lithium hydroxide is the best alkali among lithium hydroxide ,sodium hydroxide and potassium hydroxide.

研究表明在溴化四甲基銨、溴化四乙基銨操屄视、聚乙二醇（分子量為6国产女同调教精品视频，000）和聚乙二醇（分子量為400）相轉(zhuǎn)移催化體系中，氫氧化鋰最好欧美老人黄片，氫氧化鉀次之无码码一区精品品和亚洲洲，氫氧化鈉最次。

Two types of P Br N contained flame retardant,O (2,4,6 1 trioxo 1 oxyphosphabiscyclooctane 4 methylene) O (2,3 dibromopropyl)phosphoric melamine salt and O (2,4,6 tribromophenyl)phosphoric melamine salt,were synthesized from phosphorus oxychloride,pentaerythritol,2,3 dibromopropanol,2,4,6 tribromophenol and melamine,etc.

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Also, the type of dispersion of four gasliquid-liquid systems: air-decane-aqueous solution of sodium sulfite and surfactant, airmixture of decane and dodecene-aqueous solution of rhodium complex, ligand, and surfactant, air-mixture of decane, dodecene and tridecyl aldehyde-aqueous solution of rhodium complex, ligand and surfactant, and air-mixture of decane and dodeceneaqueous solution of trisodium salt of tri (m-sulfophenyl) phosphine, and surfactant is determined by electric conductivity.

本文采用電導(dǎo)率測(cè)量的方法實(shí)驗(yàn)研究了空氣—正癸烷—亞硫酸鈉和十六烷基三甲基溴化銨水溶液一级a做片免费看欧美一、空氣—正癸烷和1-十二碳烯混合物—銠膦絡(luò)合物催化劑和十六烷基三甲基溴化銨水溶液看黄片在线天堂在线、空氣—正癸烷、1-十二碳烯和十三醛混合物—銠膦絡(luò)合物催化劑和十六烷基三甲基溴化銨水溶液免费黄a网站、空氣—正癸烷和1-十二碳烯混合物—三間磺化苯基膦三鈉鹽和十六烷基三甲基溴化銨水溶液四個(gè)三相體系的液液分散特性高清激情18性爱啊啊在线欧美日韩不卡。當(dāng)有機(jī)相與水相體積比分別為7／3、1／1和3／7時(shí)亚洲一区中文字幕在线，前三個(gè)體系均形成水包油型分散www.99热这里有精品，并有穩(wěn)定的乳狀液生成。

The compound 3, 9-bis (2＇, 4＇, 6＇-tribromophoxy)-2, 4, 8, 10-traoxa -3, 9-dip- hosphospiro [5.5] undecane -3, 9-dioxide (HFR-1) was prepared with pentaeryth- ritol, phosphorus oxychloride and 2, 4, 6-tribromophenoxy soldium by esterifica- tion and condensation reaction.

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Tetraallylsilane was synthesized by one-step approach through the reaction of silicon tetrachloride with the partially solvated Grignard reagents formed in situ from allyl bromide and magnesium in the mixed solvents of toluene and ether.

采用一步合成方式，將3-溴丙烯與金屬鎂在以甲苯和供電子溶劑構(gòu)成的混合溶劑中進(jìn)行反應(yīng)精品国产福利在线观看，繼而與四氯化硅反應(yīng)淫荡的欧美性爱视频，成功合成了四烯丙基硅烷，其產(chǎn)率在乙醚與3-溴丙烯的摩爾比為4(V甲苯/V乙醚=1·1)時(shí)達(dá)到極值欧美色色影院，超過(guò)了91%欧美黑B。