Reaction of NaOAr, SmCl_3 and aryloxo-functional N-heterocyclic carbene precursor [HO-4, 6-di-~tBu-C_6H_2-2-CH_2{CHMe}]Cl in 4:1:1 molar ratio in THF in one-pot hadnt afforded an anionic phenoxide complex of samarium (5) supported by a bridged bisphenoxo through the cleavage of aryloxo-functional N-heterocyclic carbenes.

4將NaOAr2019在线中文字幕网站视频、SmCl_3和[HO-4美女顶级依人在线视频观看，6-di-~tBu-C_6H_2-2-CH_2{CHMe}]Cl以4∶1∶1摩爾比黄色美女视频软件，采用一鍋煮的方法，希望得到芳氧基功能化的氮雜環(huán)卡賓稀土芳氧配合物沒有取得成功91区国产在线观看，而是得到了斷裂的產(chǎn)物O-4亚洲视频在线88888，6-di-~tBu-C_6H_2-2-[CH{NNMe}[(O-4，6-di-~tBu-C_6H_2)_2CH_2][O-2欧美欧美性爱网站，4-di-~tBu-C_6H_3]Sm(5)色综合久久天天综合绕视看。

Unsaturated alkynyl alcohols, such as dehydronerolidol, dehydrogeranyllinalool, and dehydroisophytol, were prepared by ethynylation of turpentine derivatives, namely terpenylacetones, e. g. geranylacetone, farnesylacetone, and phyton under normal pressure in presence of alkali metal hydroxide and organic solvents.

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O-(1-Arylseleno-3-azido)isopropyl-O-2-(N3-tegafur)alkyl thiophosphate (3a～3f) were obtained via nu-cleophilic ring-opening of sodium azide to 2a～2f in dry DMF at room temperature, and their antitumor activities were tested.

以無水N，N-二甲基甲酰胺作溶劑国产国产成年年人免费看片，室溫下亚洲肏穴，疊氮化鈉中對2a～2f進(jìn)行親核開環(huán)，得到O-(1-芳硒基-3-疊氮基)異丙基-O-2-(N3-替加氟)乙基硫代磷酯狼友视频在线免费。

Poly with sulfonic acid groups were readily synthesized with biphenol and 1,3-bis(4-fluorobenzoyl)benzene in the presence of excess potassium carbonate followed by sulfonation with chlorosulfonic acid.

以二氯二苯甲烷和2久久伊人青草，6-二甲基苯酚為原料合成了含有阻礙基團的雙酚單體，用此雙酚單體和1在线污网站，3-二(4-氟苯甲?7特大黄片；?在無水碳酸鉀存在的條件下反應(yīng)制得聚芳醚酮，然后用氯磺酸磺化婷婷五月综合800，控制反應(yīng)條件狠狠se狠狠ri91视频，使磺酸基團恰好進(jìn)入苯環(huán)對位，制得新型結(jié)構(gòu)的磺化聚芳醚酮欧美色精品视频欧美精品色。

A series of sulfonated poly(arylene thioether/ether phosphine oxide)s was prepared by direct polycondensation of sBFPPO and BFPPO with the diphenol-type or dimercapto-type monomers such as hydroquinone, bisphenol-A, 4,4'-biphenol, 4,4'-diphenol (6F), 1,5-dihydroxynaphthalene, 4,4'-dihydroxybiphenyl, and 4,4'-thiobisbenzenethiol, respectively.

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To explore new synthetic methods, we set out a careful investigation of the reaction of benzimidazolium salt with many nucleophilic agents, including the active aromatic compounds and heteratom nucleophilic agents, and found that the quaternary C=N is not so active; when benzimidazolium salt is reacted with big nitrogen nucleophilic agent? phthalimide, it does not give the expected addition product, instead, produces N-alkyl phthalimide through alkyl-transfermation from benzimidazolium salt to phthalimide.

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A sulfonated poly aryl ether with sulfonic group on naphthalene ring of side chain and preparation thereof, which is capable to solve technical problems of complexity in synthesis, hardness in controlling sulphonation position and degree, high possibility of side reaction in sulphonation, complexity in sulphonation and hardness to realize indutrialzation.

一種磺酸基在側(cè)鏈萘環(huán)上的磺化聚芳醚及其制備方法国内JIZZ，解決現(xiàn)有技術(shù)中合成方法復(fù)雜亚洲午夜A∨无码毛片久久，磺化位置和磺化度難以控制，磺化過程中容易發(fā)生多種副反應(yīng)日韩久久性欲片，磺化工藝復(fù)雜難以實現(xiàn)工業(yè)化等技術(shù)問題www五月婷婷。

In order to obtain versatile ulitity of host molecules, three new chiral calix [4] crown ethers containing aza, thio atoms bearing two chiral sites provided by -cysteine ester were synthesized by the condensation of calix [4] arene diacid dichloride with oligoethylene glycol bridged bis-amino acid methyl ester. All new compounds were characterized by NMR, MS and elemental analysis.

以-半胱氨酸為手性源，利用多甘醇二氯醚在堿性條件下對半胱氨酸巰基進(jìn)行烷基化反應(yīng)91日韩一区，成功地合成了多甘醇醚鏈橋聯(lián)的半胱氨酸衍生物亚洲一区在线视频播放，醚化反應(yīng)后，在高度稀釋條件下與對叔丁基杯[4]芳烴二乙酰氯進(jìn)行雙功能基縮合反應(yīng)成功地合成了新型的手性杯[4]含氮在线看片免费观看视频网址、硫雜冠醚国产精品无码A∨一区二区三区，并利用〓H NMR、MS等譜圖手段對其結(jié)構(gòu)進(jìn)行了表征男人到天堂亚洲一区二区在线观看。

The application results from fluorination showed microwave heating could accelerate chemical reactions markedly. The reaction time could be shortened 50% at least than that of conventional heating. The relationship between fluorinating agents\' structure and their activity was studied systematically. In addition, an anhydrous KF with higher activity was prepared by using expansion effect of microwave heating. As we known, solvents were very important to reaction. The comprehensive study showed some less polar aromatic solvents could be used as dipolar solvents. In addition, they had better effect than dipolar solvents in some occasions, such as fluorination of chlorobenzaldehydes and chlorinated diphenyl ketones etc. The primary applications of ionic liquids were also studied which indicated reactions with ionic liquids as solvents were more efficient and simple.

研究表明欧美大胆A片，微波是一種節(jié)能高效的加熱方式，在微波作用下的鹵素交換氟化反應(yīng)具有反應(yīng)速度快黄色网站在线播放AAAAA、轉(zhuǎn)化率高国产精品蝌蚪专区无码、選擇性好的優(yōu)點，其反應(yīng)時間可較常規(guī)加熱縮短50%以上亚洲天堂嗯舒服好爽啊；同時也系統(tǒng)地研究了氟化劑種類及制備方式對其反應(yīng)活性的影響亚洲欧色图一级，并利用微波加熱的膨化作用制備出了一種活性較高的KF，其活性與噴霧干燥KF相差不大岛国毛片高清观看在线wy999；溶劑對反應(yīng)具有重要的作用99久久com，在此系統(tǒng)地研究了強極性非質(zhì)子溶劑和中等極性非質(zhì)子溶劑的應(yīng)用情況，發(fā)現(xiàn)一些中等極性的非質(zhì)子溶劑如硝基芳烴和氯代芳烴類溶劑在氯代苯甲醛類化合物的氟化反應(yīng)中具有比強極性非質(zhì)子溶劑更好的使用效果国产影视午夜在线观看视频免费下载。

The main contents are as follow: 1. Calixarenes and their derivatives were synthesized. Their structures were characterized by infared spectroscopy, thermal analysis and mass spectrometry. Their purities were detected by HPLC with more than 90%.

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