In the arylation reaction, the temperature was meliorated from -40℃ to -15℃, which could be easy controlled with ice-salt bath. Furthermore, the reaction could be carried out reposefully by adding the initiator.

其中在以2淫AV片，5-二氟溴苯格氏試劑進(jìn)行芳基化反應(yīng)時(shí)欧美性黄视频，改進(jìn)了反應(yīng)條件阿v视频免费观看国产视99频，克服了文獻(xiàn)使用的低溫條件(-40℃)www.草草影视.com，簡(jiǎn)便了操作，同時(shí)通過(guò)加入合適的引發(fā)劑，使反應(yīng)能夠平穩(wěn)進(jìn)行精品黄色福利x。

New chiral boronic acid sensor was synthesized and its enantioselectivity towards tartaric acid was studied.

合成了新的由蒽及苯乙胺衍生的手性芳基硼酸熒光探針，研究了該手性探針對(duì)酒石酸的對(duì)映選擇性識(shí)別作用99久久精品无码专区。

In some preferred embodiments, the aryl-containing silicone compound is triphenyl- or diphenyl-based.

在一些優(yōu)選的實(shí)施方案中查询黄色网站，含芳基聚硅氧烷化合物是基于三苯基或二苯基的。

The results show that the plant communities naturally colonizing on the wastelands markedly increased enzyme activities (urase, arylsulfatase, alkaline phosphatase and dehydrogenase) in the upper layer of the tailings (0~5 cm).

結(jié)果表明国内外黄片二级，自然定居在尾礦廢棄地上的植物群落類型能夠顯著影響表層尾礦中(0~5cm)的脲酶黄色免费网站在线观看、芳基硫酸酯酶、堿性磷酸酶和脫氫酶的活性亚洲日韩毛片一级无码。

Using p-xylene, different acyl chloride and alkylogen, six kinds of isomers were synthesized, with similar structure, carbons of same quantity, and the position of alkylaryl dissimilarity.

本文利用對(duì)二甲苯欧美精品在线看、不同碳數(shù)直鏈酰氯以及鹵代烷合成出6種結(jié)構(gòu)相似、長(zhǎng)鏈烷烴碳數(shù)為12日韩午夜软件在线观看视频网站大全、芳基在烷烴鏈不同位置的烷基苯磺酸鹽類表面活性劑18岁一下禁止观看网站。

The amidation and esterification of different cyclic anhydride s with aniline and phenol gave different major products,and the routes were optimized.

結(jié)果表明，環(huán)酐的分子結(jié)構(gòu)直接影響反應(yīng)結(jié)果日韩午夜福利片免费观看一区，當(dāng)酸酐分子存在共軛結(jié)構(gòu)時(shí)以N-芳基內(nèi)酰胺為主要產(chǎn)物进网站看黃色A片。

Thus, a stable, homogeneous melt solution is obtained from a solid mixture comprising 4,4'-biphenol(mp 282-284 DEG C) at a temperature of about 200 DEG C using either diphenyl carbonate or bis carbonate as the diaryl carbonate component.

因而，在約200℃的溫度下使用碳酸二苯酯或碳酸二酯作為碳酸二芳基酯組分久久综合亚洲，由含有4啊啊啊啊用力插视频，4′-二酚(mp282-284℃)的固體混合物獲得穩(wěn)定、均質(zhì)熔體溶液AAA污视频在线。

Iodobenzene, bromobenzene and their derivatives reacted smoothly with n-butyl acrylate or styrene under phosphine-free reaction conditions in the presence of palladium acetate and fluoroquinolones.

碘苯久久黃片、溴苯和其它芳基鹵衍生物與丙烯酸丁酯、苯乙烯等取代乙烯類化合物在鈀和氟喹諾酮的催化下發(fā)生Heck反應(yīng)免费人成视频在线播放视频在线。

Further aza-Wittig reactions of iminophosphorane 3 with aromatic isocyanates gave the carbodiimide s 4, which were reacted with secondary amines to give 2-dialkylamino-thieno[2,3-d]pyrimidin-4(3H)-ones 6 in the presence of catalytic amounts of EtO-Na+ in 58%～82%.

應(yīng)用膦亞胺3與芳基異氰酸酯的氮雜Wittig反應(yīng)亚洲一区二区三区福利视频，生成的碳二亞胺4，再與仲胺作用得到中間體5国产人A片视频在线播放，而后在醇鈉的催化下關(guān)環(huán)制得2-二烷氨基噻吩并[2AV无码免费毛片一二三四，3-d]嘧啶-4(3H)-酮衍生物6，產(chǎn)率為58%～82

In addition, the catalytic coupling of iodobenzene with cyanoacetate has been studied.

本方法具有催化效率高精品国产一级在线观看，反應(yīng)條件溫和的特點(diǎn)欧美。。日韩。欧美。亚洲，可順利地制備得到α—芳基丙二腈化合物。