己二酮

The second reaction we tested was diastereoselective Michael-Aldol annulation of -keto ester 121 with methacrolein to give a key intermediate for synthesizing (--Huperzine A.

通过对反应条件的筛选，我们得到的最好的结果是以-乳酸苄酯为手性辅基的β-酮酯121i为底物，以(1R， 2R)-环己二胺衍生的手性胍85i为催化剂，以无水四氢呋喃为溶剂，在-20℃反应，得到的产物的de值为73.2%。

Hydroxyl octanoic acid(1) was synthesized from heptaldehyde by a four-step reaction of nucleophilic substitution,displacement reaction,acid hydrolysis and deaminization.

以正庚醛为原料，经过亲核取代、置换反应、酸水解及碱化脱氨等4步反应合成了制备3，6-二己基-1，4-二氧杂-2，5-二酮的中间体——α-羟基辛酸(1)；1经对甲苯磺酸催化脱水得辛交酯。

In the second part, the active tautomer of the HPPD inhibitor, 2-[2-nitro-4--benzoyl]-1,3-cyclohexanedione was studied bythe quantitative structure-activity relationship.

其后，我们利用三维构效关系对HPPD酶的高效抑制剂2-(2-硝基-4-三氟甲基苄基)-环己烷-1，3-二酮的活性结构进行了研究。

A set of laser monitoring observation system to be used for measure the solubility with a high speed, which is programmed heating apparatus , have designed. The solubility of 1,2-cyclohexanediol were measured in water, methyl acetate, acetic ester, propyl acetate, butyl acetate, methyl acrylate, ethyl acrylate, acetoacetic ester at different temperature.

另外，还建立了一套带激光监视系统，可以控制升温速率的溶解度测定实验装置，测定了反式-1，2-环己二醇在水、乙酸甲酯、乙酸乙酯、乙酸丙酯、乙酸丁酯、乙酰乙酸乙酯、丙烯酸甲酯、丙烯酸乙酯和甲基丙基酮等9个二元体系中的溶解度。

Objective To synthesize 10-O-adipic acid-[2'-methoxy-4'-(3"-keto-1"-Butenyl)-Phenoxy-]-dihydroartemisinin conjugate.

目的 合成10-O-己二酸基－［2'-甲氧基4'-（3&-酮－1&-丁烯基）－苯酯］－双氢青蒿素酯。

Ketimine, which is prepared by acetone and ethylene diamine or hexamethylene diamine was used as potential chain extender to improve the properties of aqueous polyurethane resin.

用丙酮分别和乙二胺、己二胺反应制备酮亚胺，并以其作为潜伏性扩链剂改善水性聚氨酯的性能。

The PUUs and PUAs synthesized with isophorone diamine showed lower degree of hydrogen bonding for the urea carbonyl groups existed in the system as well as better miscibility between soft and hard segments, compared to those prepared with ethylenediamine or hexanediamine as chain extenders.

用异佛尔酮二胺、乙二胺和己二胺三种扩链剂合成了不同结构的脂肪族聚氨酯脲和聚脲，并考察了扩链剂对聚氨酯脲和聚脲形态结构与性能的影响。

A series of copolymers of ε-caprolactone with 3-methyl-morpholine-2,5-dione are synthesized by using stannous octoate as catalyst.

以辛酸亚锡为催化剂，合成了3-甲基吗啉-2，5-二酮与ε-己内酯的共聚物，并用 FT-IR、~1HNMR、DSC、粘度测定等分析方法对共聚物进行了表征。

The volatile components were separated and identified using GC-MS technique. RESULTS Seven ingredients were. isolated: 2-ethyl-hexyl-adipate (66.5%), 1-methoxy-4-(1-propenyl)benzene (12.5%), isopropyl isothiocyanate (6%), isobutylisothiocyanate (6%), 6-methyl-5-heptene-2-one (3.5%), benzaldehyde (1.4%), phenylacetaldehyde (0.8%).

结果 分离出7个成分，采用峰面积归一化法确定了各成分的相对含量，分别为66.5%双－2-乙基己基－己二酸、12.5%1-甲氧基－4-（1-丙烯基）苯、6%异硫氰酸异丙酯6%、6%异硫氰酸异丁酯、3.5%6-甲基－5-庚烯－2-酮、1.4%苯甲醛、0.8%苯乙醛。

The results showed that the suitable condition for the reaction are as follows: benzaldehyde/1, 2-propylene molar ratio is 1:1.4, the mount of potassium dodecatungstocobaltate trihydrate (K5CoW12O403H2O) is 0.5g, the volume of cyclohexane is 9 mL, and reaction time is 70 min.

实验结果表明，杂多化合物K5CoW12O403H2O是合成环己酮l， 2-丙二醇缩酮的良好催化剂，在酮醇物质的量比为l：1.4、催化剂质量为0.5g、带水剂环己烷体积为9mL、反应时间为70min的最佳条件下，环己酮l， 2-丙二醇缩酮的收率最高可达94.2%。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。