Ethyl phenoxyacetate has been synthesised by the reaction of phenol with ethyl chloroacetate under the condition of solid-liquid phase transfer catalysis using PEG-400 as the catalyst.

于固一液相轉(zhuǎn)移催化條件下，以PEG-400為催化劑曰本特黄免费视频在线观，通過(guò)苯酚與氯乙酸乙酯反應(yīng)合成了苯氧基乙酸乙酯国产性交一级黄色视频。與85％的水合肼作用得到相應(yīng)的酰肼。

For catalysis of chlorous acid to chlorine dioxide, the chlorous acid may be generated by ion exchange or in a conventional manner.

對(duì)于亞氯酸催化為二氧化氯來(lái)說(shuō)www.一级毛片，可以通過(guò)離子交換或者以常規(guī)的方式產(chǎn)生亞氯酸。

Chlorine dioxide is geenrated in a controlled manner from chlorous acid by catalysis.

通過(guò)催化作用由亞氯酸以可控方式產(chǎn)生二氧化氯日韩手机福利写真在线观看。

Application of organic acid catalysis to the polymerization of pyrroles and pentafluorobenzaldehydes, with the xylene as reaction medium instead of expensive collidine used in the conventional methodology, resulted in a relatively high yield of TPFPPH〓.

本研究利用有機(jī)酸如氯乙酸催化吡咯和五氟化苯甲醛聚合就要干综合，并以二甲苯替代傳統(tǒng)方法所用的昂貴溶劑2，4A片毛在线是免费观看，6-三甲基吡啶美女一级日逼毛片，獲得了產(chǎn)率較高的TPFPPH〓。

Rectangle stripe-like alignments of 3D CNTs, with a feature of high resolution, were controllably fabricated by a shadow mask and vacuum deposition of a metal catalysis.

采用掩模和鍍膜技術(shù)国产精品91在线播放，可控性地構(gòu)筑了具有高分辨率的條紋狀的三維納米管陣列圖案成年男人黄网站色大片免，實(shí)現(xiàn)了碳納米管的定位和定向生長(zhǎng)欧洲美女一级牲交不卡。

The crotonaldehyde is produced upon catalysis and condensation with acetic aldehyde as raw materials. It is a major raw material for making sorbic acid.

巴豆醛是以乙醛為原料，經(jīng)NaOH催化縮合產(chǎn)生国产精品视频一级香蕉AAA，是制造山梨酸的主要原料五月婷婷激情四射。

Based on the problem of various types of catalyst and according to the features of carbonylation catalysts reactions, our team has been designed a series of new metal complexes of benimidazoles, which can be used for carbonylation catalyst of industry. Seven new benzimidazole derivatives were prepared by the o-phenylenediamine、oxalic acid愉拍自拍视频在线播放网站下载安装、glycolic acid在线视频国产欧美、monomethyl monopotassium malonate、ethyl cyanoacetate欧美bbbbbb、succinic anhydride. The structures of them were confirmed by IR欧美性爱首页、Elemental analsis. The crystal structures of d and e were determined by X-ray single crystal diffraction of Germanic Bruker Smart APEX II CCD. The catalysis of them was tested by carbonylation reactions.

本文設(shè)計(jì)以鄰苯二胺和草酸、羥基乙酸免费无遮挡黄色视频、丙二酸單甲酯人妻AV无码久久系列、氰基乙酸乙酯、丁二酸單甲酯為原料采用PPA催化和無(wú)機(jī)酸催化法亚洲无码第一页，合成了4種苯并咪唑-2-羧酸衍生物并進(jìn)行了表征在线播放国产精品第一页；培養(yǎng)了2個(gè)化合物d、e的晶體并測(cè)定和討論了晶體結(jié)構(gòu)性生大片免费观看视频网站一；制備了3種未見(jiàn)報(bào)道的苯并咪唑金屬配合物人人艹五月天，對(duì)配合物在羰基化法制醋酐-醋酸反應(yīng)的催化作用進(jìn)行了初步試驗(yàn)。

Cyclopentenopyridine(3) in yield of 65% was synthesized from acrolein ,cyclopentanone and NH3 by heterogeneous catalysis reaction through a fixed bed reactor.

以丙烯醛和環(huán)戊酮為原料黄片aaaaaaa片，用固定床多相催化法合成了2国产av天堂久久久久，3-環(huán)戊烯并吡啶，收率65%曰韓黃色視頻，含量高于50%东北老妓女叫床对白视频。

The related reaction conditions and factors such as catalysis of some catalysts etc were discussed. In the procedures, 2-pentylidene cyclopentanone intermediate, which could be isomerizated into a 2-pentyl cyclopentenone under acidic conditions, was effectively prepared in the presence of a phase transfer promotor.

討論了正戊醛和環(huán)戊酮在堿性條件下縮合生成2-亞戊基環(huán)戊酮的反應(yīng)溫度、堿濃度国产看片地址、相轉(zhuǎn)移催化劑等因素對(duì)反應(yīng)的影響激情视频在线网。2-亞戊基環(huán)戊酮中間體化合物能在酸催化劑作用下，異構(gòu)成2-戊基環(huán)戊烯酮特黄特色的大片观看免费视频，其中酸濃度和溶劑等參數(shù)對(duì)反應(yīng)影響明顯欧美喷水性交。

Taking 4-bromobenzaldehyde, acetic, benzaldehyde and ammonium acetate as major raw material, the 4, 5-bis(4-bromophenyl)-2-phenyl-1H-imidazole was synthesized by means of catalysis, oxidation and Debus cycloaddition reaction.

以對(duì)溴苯甲醛為原料通過(guò)催化，氧化生成12021自拍偷拍，2-二（4'-溴苯基）乙二酮久久精品亚洲欧美vA，再以其與苯甲醛、醋酸胺和醋酸通過(guò)德布斯法合成2-苯基－4久久精品国产96久久，5-二（4'-溴基苯基）咪唑全裸美女私拍精品视频在线观看免费。