Methoxycarbonyl-4-(4-methoxyphenyl )-6-methyl-3, 4-dihydropyrimidine-2(1H)-one was synthesized from anisaldehyde, methyl acetoactate and urea in presence of HF-1O1 strong acidic ion-exchange membrane.

在HF-101強(qiáng)酸性離子交換膜的存在下国产人成激情视频在线观看，由對羥基苯甲醛、乙酰乙酸甲酯與脲一步合成了5－甲氧羰基－4－（4－甲氧苯基）－6－甲基－3国产精品特黄特粗又长视频，4－二氫嘧啶－2(1H)－酮国产欧美久久一区二区三区。

New compounds of the type of N--N'-(2,4-dichlorophenyloxyacetyl)-semicarbazides were synthesized by a series of reactions of preparing organic isocyanates by Curtius rearrangement with 2,4- dichloro aryloxyacetic acid hydrazide using one-pot procedures.

以芳香取代酸為原料，用Curtius重排的方法合成異氰酸酯五十路熟妇高熟无码av种子，直接與2亚洲无码高清四级黄色网，4-二氯苯氧乙酰肼作用，一鍋法合成了4種N-取代芳基-N'-(297超级碰碰碰久久久久久合集，4-二氯苯氧乙跞蘸ㄇ衣浊考椋基)氨基脲類化合物。

Benzyloxy benzoyldimethylsulfoxide was prepared by the reaction of ethyl 4-benzyloxybenzoate and dimethyl sulfoxide in the presence of sodium hydride, followed by Pummerer reaction with concentrated hydrochloric acid to afford eo-hydroxy-co-thio-methyl-(4/-benzyloxy) acetophenone, which reacted with urea, thiosemicarbazide, semicarbazide hydrochloride and o-phenylenediamine to give imidazolidine-2,4-dione, l,2,4-triazine-3- one and quinoxaline derivatives, respectively.

本文用4-芐氧基苯甲酸乙酯和二甲亞砜為原料看黄a大片欧美欧美大片，在氫化鈉存在下反應(yīng)国模吧网站，合成了(4′-芐氧基)-苯甲酰基-二甲亞砜国产AAA无码视频。研究了該亞砜在濃鹽酸的存在下發(fā)生的Pummerer重排反應(yīng)女人十八片，用重排產(chǎn)物ω-羥基-ω-甲硫基-(4′-芐氧基)-苯乙酮分別與尿素、氨基脲日本黄色视频网址、氨基硫脲和鄰苯二胺反應(yīng)合成了2XXNX日本19视频，4-咪唑啉-二酮、1色就操视频在线，2国产欧美日韩操屄视频，4-三嗪-3-酮、喹喔啉等含氮雜環(huán)化合物超碰在线97人人。

Methacryloyloxydecyl-2-thiouracil-5-carboxylate was synthesized from the reaction of thiouracil with diethyl ethoxymethylene malonate and ω-hydroxy-decyl-methacrylate.

以硫脲99自拍偷拍福利、乙氧基次甲基丙二酸二乙酯和甲基丙烯酸ω-羥癸酯為主要原料合成了一種新的粘接性單體10-甲基丙烯酰氧癸基－2-硫脲嘧啶－5-羧酸酯。

In order to find biologically active urea compounds,seven new N-[5-(3-pyridyl)-1,3,4-thiadiazol-2-yl]-N'- urea derivatives were synthesized by the reaction of 2-amino-5-(3-pyridyl)-1,3,4-thiadiazole with aroylazides,which were prepared starting from carboxylic acids,ethyl chloroformate and sodium azide by one-pot procedure.

為了尋找高生物活性的脲類化合物亚洲伊人天堂午夜网站，通過2-氨基-5-(3-吡啶基)-1黄网址入口，3，4-噻二唑與醢谰猛荆基疊氮化物反應(yīng)97资源共享国产美女视频，設(shè)計(jì)合成了7個新的N-[5-(3-吡啶基)-1，3色综合色综合久久，4-噻二唑-2-基]-N'-取代苯基脲日本高清在线播放专区，其中芳酰基疊氮化物是以芳酸免费一级a毛片在线视频、氯甲酸乙酯亚洲欧美色自拍偷拍、疊氮化鈉為起始原料采用&一鍋法&所制得。

Two novel pyrazolone derivatives 2-ethylamino-6H-5-(1-phenyl-3-methyl/phenyl-5-pyrazolone-4-ylene)-1,3,4-thiadiazine (PMCP-ETSC/DPCP-ETSC) containing NNS six-membered heterocycles were synthesized by the condensation reaction of 1-phenyl-3-methyl/phenyl-4-chloroacetyl-pyrazolone-5 with 4-ethyithiosemicarbazide. The title compounds were characterized by elemental analysis, IR, 1H NMR, 13C NMR and single-crystal X-ray diffraction.

利用1-苯基－3-甲基／苯基－4-氯乙跹侵夼基－吡唑啉酮－5與4-乙基氨基硫脲發(fā)生縮合反應(yīng)黄片操n，生成了2個新的雙雜環(huán)化合物2-乙氨基－6H-5-（1-苯基－3-甲基／苯基－5-吡唑啉酮－4-基）－1，3，4-噻二嗪(PMCP-ETSC/DPCP-ETSC)射射射操操操，并對其進(jìn)行元素分析在线无码第一区亚洲第一页、紅外光譜、核磁共振表征和晶體結(jié)構(gòu)分析在线的免费黄色网站插。

The results showed 3 types of aluminum compound prepared in this paper all had good poison protection effectiveness on such impurities as stannous chloride,lead oxide,sodium hydrogen sulfate,and so on.Moreover,the mechanism of the poison of catalyst was also discussed.

結(jié)果表明国产91视频福利，合成的3種防中毒劑即防－1、防－2(主要成分為乙酰丙酮合鋁)及防－3(主要成分為二乙酰丙酮基異丙氧基鋁)對二月桂酸二丁基錫精品久久久久久电影、氯化亞錫狠狠干狠狠操狠狠爽、二正丁胺、硫脲99riav1com、氧化鉛及硫酸氫鈉等雜質(zhì)均有較好的防中毒作用九九热线国产精品视频6；不同防中毒劑對不同雜質(zhì)的防中毒作用有一定的選擇性。