Chiral N,P ligand 5 was examined for the asymmetric allylic alkylation of 1,3-diphenyl-2-propenyl acetate with up to 89% yield and up to 81.6% ee.

化合物5用于鈀催化的1精品国产一区二区亚洲人成毛片，3-二苯基-2-烯丙基乙酸酯的不對稱烯丙基烷基化反應超碰97人人妻，產(chǎn)率為89%无码黄片观看不卡，對映體過量最高為81.6% eeav免费体验区试看。

The obtained compound (2) was treated with borane-tetrahydrofuran (B2H6–THF) complex under nitrogen atmosphere in excessive THF for 18 h to give a kind of dark brown oil,followed by ammonolysis with NH3·H2O in autoclave at 100 ℃ for 6 h to produce 2-(5-amino-2- nitrophenyl) ethanol (3) in 84.4% yield.

用硼烷還原5-氟-2-硝基苯乙酸后人人操人人爽黄色片，接著用氨水在高壓釜中加熱到100 ℃氨解91天堂精品一区二区在线看，得到2-(5-氨基-2-硝基苯)乙醇（84.4%）。

We provide intermediates of Methylphenidate HCl: 2-Phenyl-2-(2-Piperidyl) Acetamide; 2-Phenyl-2-(2-Piperidyl) Acetic Acid; Series of Benzoic Acid国产一级A片不卡在线观看视频、Benzonitrile; Other pharmaceutical intermediates.

提供鹽酸利他林中間體：2-苯基-2-(2-哌啶基)乙酰胺日韩中文字幕无码一级毛片；2-苯基-2-(2-哌啶基)乙酸；苯甲酸欧美a片黄片大片、苯甲腈系列及其他醫(yī)藥中間體精品黄色网站在线入口。

In our research on study chemical reaction of active methylene compounds and brom-acetophenone. Because of brom-acetophenone is compound that contain carbonyl and halogen ,which will take place electrophilic substitution and nucleophilic addition. When active methylene compounds are ethyl acetoacetate and β-diketone, controlling reaction condition, we have found that mono-substitution's production and di-substitution's. production is isolated; active methylene compounds are acetoacetanilide and acetoacetanilide derivate, pyrrolidin-2-one derivants were obtained by substitution and close-ring reaction .but there is no report about it.

本文是讓活潑亞甲基類化合物與溴代苯乙酮發(fā)生化學反應，由于溴代苯乙酮是含有羰基的鹵代烴結(jié)構(gòu)美女被操逼网站，它可以發(fā)生親電取代和親核加成反應国产精品福利导航，當活潑亞甲基類化合物為乙酰乙酸乙酯和β-二酮時，控制反應條件可以發(fā)生單取代和雙取代兩種產(chǎn)物韩国精品无码永久在线观看；當活潑亞甲基類化合物為乙酰乙酰芳胺類化合物來反應時亚洲中文字幕精品久久HD，溴代苯乙酮中的羰基與氨基會發(fā)生分子內(nèi)的關(guān)環(huán)反應生成吡咯烷-2-酮衍生物，這在以前的研究中是沒有發(fā)現(xiàn)的超碰98人妻。

The mechanism was supposed as follows: polyfluoroalkyl iodides were initiated by sodium dithionite to give R〓 which was added to one double bond of diallylacetic acid, after the sequential radical cyclization and nucleophilic substitution to form bicyclo-lactones.

這是因為：多氟烷基碘化物在連二亞硫酸鈉的引發(fā)下欧美黄色乱轮，得到自由基R〓，后者加成到二烯丙基乙酸中的一個—C=C—雙鍵上网站黄色视频免费，然后在堿性介質(zhì)中進行分子內(nèi)親核反應得到雙環(huán)內(nèi)酯類產(chǎn)物经典人人操人人干人人看。

In this report, the 59Tc labelling of Annexin V fragment modified with HYNIC (HYNIC-Anx13) using Tricine, EDDA or EDDA/Tricine as coligands was described. The effect of various factors on 99Tc labelling was investigated. Biodistribution studies in normal mice and gamma imaging of apoptosis in rats induced by cyclophosphamide were performed.

為探討99Tc標記的HYNIC-Anx13用于細胞凋亡顯像的可能性，分別以N-［三甲基］甘氨酸色哟哟毛片网站，乙二胺－N黄色av网址在线播放，N'-二乙酸和EDDA/Tricine為協(xié)同配體，對經(jīng)6-肼基煙跻寥嘶破九九荆基修飾的膜聯(lián)蛋白V片段(HYNIC-Anx13)的99Tc標記條件和主要影響因素進行了研究亚洲图片家庭乱伦，并完成了HYNIC-Anx13的99Tc標記物在正常小鼠體內(nèi)的生物分布和大鼠細胞凋亡模型的顯像實驗。

Then, N-for-aspartame was obtained from the reaction of 3-formyl-4-carboxymethyl-1,3-oxazolidine-5-one and L-phenylalanine methylester hydrochloric acid under sodium acetate anhydrous in ethyl acetate, and the target product was prepared after removing formyl in the mixture system of hydrochloric acid, methanol and water, the yield of aspartame reaches 89.2%.

最后xxxx性16xx，用3-甲酰-4-羰基口惡唑烷-5-酮乙酸與L-苯丙氨酸甲酯鹽酸鹽在溶劑中進行接肽反應啊灬啊灬高潮来了视频在线观看，然后在甲醇/鹽酸混合體系中進行脫甲酰保護基，從而得到最終目標產(chǎn)物真实处破女www，產(chǎn)率為89.2%女性视频网站,色。

From Cacalia deltophylla (collected from Luqu County, Gansu Province), 22 compounds were isolated, of which 15 compounds have been identified. Among them, two compounds are new. They are named as 3-methyl-4-hydro-8-acetyl-furanonaphth-9-one and 1hydroxy-2-methoxy-3-acetyl-4, 8-dimethyl-5, 8-dihydro-naphthalene.

從采自甘肅省碌曲縣的三角葉蟹甲草全草的甲醇提取物的石油醚部分和乙酸乙酯部分中日韩午夜福利版在线播放观看，采用同樣方法分離得到22個化合物，鑒定了其中的15個化合物人人操毛片免费看，其中有2個為新化合物久欠精品国国产99国产精2020，分別命名為3-甲基-4-氫-8-乙酰基-呋喃萘-9-酮（2）和1-羥基-2-甲氧基-3-乙踉谙卟シ啪罚基-4久久久久免费视频a片，8-二甲基-5丁香六月激情久久，8-二氫-萘（3）18禁黄网站禁片。

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Bromo-5-formyl -3-methylpyrrole is an important intermediate of tolyporohin. On the base of introducing the present research and development of tolypo- rohin and pyrroles ramification at home and abroad, an emphasis was made on synthesis of 2-Bromo-5-formyl -3-methylpyrrole and the technical conditions of all steps, which was described as follows. Diethyl 3,5-dimethylpyrrole-2,4-dicarboxylate was made by nitrification, reduction and cycle of ethyl acetoacetate.

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