丙二醇

Process for the manufacture of a dialkylphenylethylmalonatewhich comprises adding to a quantity of sodium which is covered with a hydrocarbon solvent boiling above 100°C, at least a chemically equivalent proportion of methyl, ethyl or a propyl alcohol, subsequently adding an approximately equivalent proportion of a dialkylcarbonate and of an alkyl phenylacetate, the alkyl groups in these two last-mentioned compounds being preferably the same as the alkyl radical of the above –mentioned lower aliphatic alcohol, heating the mixture to induce reaction and continually distilling out the alcohol formed from the reaction zone and finally causing the sodio diethyl phenylmalonate so formed to interact with an ethylating agent.

生产二烷基苯基丙二酸酯的工艺过程：这包括这包括把至少处于化学平衡的甲醇，乙醇或丙醇添加到覆盖着沸点超过一百摄氏度的碳氢化合物溶剂中，接着加入大约相同当量的二烷基碳酸酯和烷基乙酸苯酯，在刚才提到的化合物中，其烷基集团最好是和刚才提到的低级别脂肪族醇相同，然后加热反应混合物从而引导反应的进行，在反应区域通过连续蒸馏移除形成的醇类。最后使所形成的钠代二乙基苯基丙二酸酯和乙基化试剂反应。

Diallyl trisulfide was synthesized with a yield of 76.4% based on sodium thiosulfate, allyl bromide and sodium sulfide. And diallyl tetrasulfide was synthesized by the reaction of sulfur monochloride with ally1 mercaptan with a yield of 81.0%.

以硫代硫酸钠、烯丙基澳和硫化钠为原料，合成了二烯丙基三硫，产率为76.4%；以一氯化硫和烯丙硫醇为原料合成了二烯丙基四硫，产率为81.0%。

Water,cetearyl alcohol,butylene glycol,ceteth-20,glycolic acid,cyclomethicone,citric acid,sodium hydroxide,xanthan gum,lactic acid,phenoxyethanol,sodium citrate,magnesium aluminium silicate,citrus aurantium dulcisoil,disodium edta,pentadecalactone,methylparaben,iris germanica root extract,butylparaben,ethylparaben,propylparaben,silica,chlorhexidine digluconate.citrus aurantium amaraoil,limonene,linalool

水， 棕榈醇，丁二醇，鲸蜡醇聚醚 20，甘醇酸，环甲硅脂，柠檬酸，氢氧化钠，山羊胶，乳酸，苯氧乙醇，柠檬酸钠，硅酸镁铝，甜橙油，乙酸乙二胺二钠，环十五内酯，羟苯甲酯，鸢尾花根萃取，羟苯丁酯，羟苯乙酯，羟苯丙酯，二氧化硅，洗必泰葡萄糖酸盐，苦橙油，柠檬精油，芳樟醇

Firstly, 3-ethylthiobutanal was prepared from crotonaldehyde reacting with ethanehiol in triethylamine with high yield. Secondly, methyl acetoacetate was converted to 6-ethylthiohept-3-en-2-one by three steps via hydrolysis, condensation with 3-ethyltio-butanal and dehydration, then 6-ethylthiohept-3-en-2-one was cycloco ndensed with dimethyl malonate by Michael addition and Claisen condensation, followed by saponification and decarboxylation to give the intermediate of 5-(2-ethylthiopropyl)-cyclohexane-1,3-dione.

首先，以巴豆醛与乙硫醇为原料，在三乙胺的催化作用下高收率制得3-乙硫基丁醛；然后从乙酰乙酸甲酯出发，通过碱水解、与3-乙硫基丁醛缩合、脱水三步反应合成6-乙硫基-3-烯-2-庚酮，接着6-乙硫基-3-烯-2-庚酮与丙二酸二甲酯通过Michael加成和Claisen缩合成环，再通过皂化和脱羧反应生成中间体5-[2-丙基]-1，3-环己二酮；再与丙酸酐反应丙酰化，最后与0-3-氯-2-丙烯基羟胺肟化，得到目标化合物烯草酮。

Professional sales companies operating bromide products: sodium bromide, sodium bromide, potassium bromide, potassium bromate, Tetrabromobisphenol A, Deca-BDE, ten PBDEs, DBDPE, hexabromodiphenyl Central dodecane, dibromo neopentyl glycol, neopentyl bromide three alcohols, three bromine phenol, octabromodiphenyl ether, brominated polystyrene, bromide, calcium bromide, dibromo succinic acid, dibromo-D ene glycol, bromide surfactants series: Dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide, cetyltrimethyl ammonium bromide, octadecyl trimethyl ammonium bromide dodecyl trimethyl ammonium chloride, tetradecyl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, tetrabutyl ammonium bromide wholesale sales: dimethylolpropionic acid, DL-malic acid, isophthalic acid PIA, glycolic acid, adipic acid.

公司专业经营销售溴化物系列产品：溴化钠、溴酸钠、溴化钾、溴酸钾、四溴双酚A、十溴二苯醚、十溴联苯醚、十溴二苯乙烷、六溴环十二烷、二溴新戊二醇、三溴新戊醇、三溴苯酚、八溴醚、溴化聚苯乙烯、溴化铵、溴化钙、二溴丁二酸、二溴丁烯二醇、溴化表面活性剂系列：十二烷基三甲基溴化铵、十四烷基三甲基溴化铵、十六烷基三甲基溴化铵、十八烷基三甲基溴化铵、十二烷基三甲基氯化铵、十四烷基三甲基氯化铵、十六烷基三甲基氯化铵、十八烷基三甲基氯化铵、四丁基溴化铵批发销售：二羟甲基丙酸、DL-苹果酸、间苯二甲酸 PIA、羟基乙酸、己二酸。

The result showed due to yeast fermentation process there were many new aroma components in jujube wine which were different from the juice: Isoamyl alcohol, Phenylethyl alcohol, Benzyl alcohol and so on; jujube juice hexadecanoic acid and other senior fatty acid composition obviously degradated; Alcohols and esters composition were sharply upward.

反映出发酵过程由于酵母的繁殖代谢产生了很多新成分，如异戊醇，丁酸乙酯，辛酸乙酯等；枣汁中十六酸等高级脂肪酸成分明显降解，苯乙醇，2，3-丁二醇，己二酸(2-甲基)丁酯，己二酸二异丙酯等醇类和酯类成分呈急剧上升的趋势。

A series of 3 - aryl - 3 -( 5,5 - dimethyl - 3 - hydroxy - 2 - cyclohexene - 1 - one - 2 - yl) propanoic ester s were synthesized by reaction between aromatic aldehydes ,5,5- dimethyl -1,3-cyclohexanedione and isopropylidene malonate catalyzed by KF - Al2O3 in alcohols.

在KF-Al_2O_3催化下，将芳香醛3，5-二甲基-1，3-环己二酮及丙二酸亚异丙酯在醇中反应，一锅式合成了一系列的3-芳基-3-(5，5-二甲基-3-羟基-2-环己烯-1-酮-2-基)丙酸酯。

The hydrophobic core serves as a reservoir for water-insoluble drugs.Hence,these nanoparticles can be used as carriers for hydrophobic drugs.For the synthesis of cholesterol-modified glycol chitosan conjugates,a carboxyl group was initially introduced to cholesterol molecule using succinic anhydride,and then covalently coupled with the primary amino group of glycol chitosan in the presence of 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride and N-hydroxyl succinimide.

本文采用二步反应将胆固醇接枝到乙二醇壳聚糖，首先将胆固醇进行羧基化，将胆固醇与琥珀酸酐反应生成胆固醇半琥珀酸酯，然后用1-乙基-3-(3-二甲基氨丙基)碳二亚胺盐酸盐与N-羟基琥珀酰亚胺作为偶联剂，将胆固醇半琥珀酸酯的羧基与乙二醇壳聚糖主链的氨基进行反应，得到胆固醇疏水改性乙二醇壳聚糖共聚物。

It was discovered that trimalonic acid C60、fullerol、dimalonic[60]fullerene hydrolysate、tetraethyl methano[60]fullerenediphosphonate、methano[60]fullerenediphosphonic acid and dimalonic acid C60 exhibited different inhibitory effects on Taq DNA polymerase.

实验发现，6种富勒烯衍生物三丙二酸富勒烯、富勒醇、富勒烯丙二酸水解物、亚甲基富勒烯二膦酸四乙酯、亚甲基富勒烯二膦酸四乙酯的完全水解物和二丙二酸富勒烯对Taq DNA聚合酶存在不同程度的抑制作用。

In home, due to the shortage of polyester glycol, one of raw materials of preparing water-borne polyurethane, aromatic polyester glycols having designed molecular weight of 600,1000 and 2000 are synthesized in lab.

由于国内缺乏制备水性聚氨酯的原料聚酯二醇，实验自制了设计分子量为600、1000和2000的芳香族聚酯二醇；其中以邻苯二甲酸酐、间苯二甲酸、对苯二甲酸为二元酸，乙二醇、1，3—丙二醇和新戊二醇等为二元醇。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。