衍生物

Product and its derivatives are shippable.

产品及其衍生物可被运送。

More and more attention has been paid to the oxidation of the side chain on the ethylbenzene and its derivatives.

乙苯及其衍生物的侧链氧化制备芳酮的方法越来越受到重视。

A mig (mannose insensitive germination) mutantpool, which was created with T-DNA insertion by Kenneth Feldmann, University ofArizona (ecotype Wassilewskija-2, Ws-2), was obtained from the Nottingham ArabidopsisStock Centre, UK. mig3 is one line of the mutant pool, which was thought as aputative mutant for having a high germination rate (about 70%) on MS media containingabout 5-7.5 mM mannose. Lately, the mig3 was found there are some special characteristicsin two French labs by Laurent Signore and Marlire Dieuaide.

本文作者就是以这一突变体为研究对象，开展了有关控制mig3突变体的基因的定位研究研究；并同时开展了在几种糖及其衍生物诱导下的光合作用有关基因表达的研究；这一突变体在开花前后几种糖分含量的调查；开花习性及形态方面的调查。

Transition metal complexes based on benimidazoles can be used as simulacrum of biology molecular, even more catalytic activity was found in some of them.

研究发现苯并咪唑衍生物与过渡金属形成的配合物中，有些具有生物分子的模拟酶作用，部分还具有催化活性。

Series of β-sitosterol derivative are synthesized in order to select the more effective insecticide and to study the relationship between molecular structure and insecticidal activity.

为筛选更有效的杀虫剂，探明β谷甾醇的分子结构与杀虫活性之间的关系，合成了一系列的β谷甾醇衍生物。

Condensation condition was studied for lipase-catalyzed synthesis of β-sitosterol ester with conjugated linoleic acid in organic solvent.

采用高效酰化催化法和酰氯化法分别合成了燕尾型胆甾醇酯和对称脂肪族二羧酸胆甾醇酯两类衍生物样品。

Keywords β-sitosterol;β-sitosterol derivative;synthesis;structure characterization

谷甾醇；β-谷甾醇衍生物；合成；结构表征

With L-DOPA as the starting chiral phenylalanine derivatives, construction of the skeleton of Phthalascidin was studied. Firstly, starting from L-DOPA and 3,4-dimethoxyphenylalanine, an amide 〓 was obtained, and a modeling cyclization reaction was carried out but failed to give the anticipated product.

二、对由苯丙氨酸甲酯衍生物通过Bischler-Napieralski反应合成四氢异喹啉—3—甲酯进行了研究，通过研究首次发现，生成苄基噁唑的反应是正常的B-N反应的竞争性反应，并从机理上给予了解释，所得出的结论具有一定的规律性，在杂环的合成方面具有一定的应用价值。

The synthesis of the pentacyclic skeleton of Et-743 and the construction of the five chiral centers thereof.1. The core pentacyclic skeleton of phthalascidin was constructed with L-dopa as the starting material via thirteen steps. First, two basic synthons, the C-1 functionalized tetrahydroisoquinoline compounds 8 and N-protected Z-dopa derivative 9, were prepared from L-dopa. They were coupled via amide bond to form the dipeptide compounds 10, which were the first key intermediates. Then the primary hydroxyl groups were transformed into the corresponding amino aldehydes 11 via Swern oxidation. Followed by the intramolecular Pictet-Spengler cyclization, the pentacyclic compounds 12 were synthesized.

五环骨架的构建及五个正确手性中心的确立：1.1我们以L-多巴为起始原料，经过多步官能团保护和转化合成了基本结构单元8然后和苯丙氨酸衍生物9，通过缩合反应生成酰胺中间体10，经Swern氧化得到醛化合物11，然后再次利用分子内改良的Pictet-Spengler反应一步构建c，d两环，得到五环骨架化合物12，最后，实现了21-位羰基向氰基的转化，得到了C-1位官能化的化合物14，化合物14不但具有和Et-743一致的五环骨架，而且分子中五个手性中心立体构型也与其完全相同：其中，3，位和13，位的手性中心由原料L-多巴带入，而1，位，11，位和21，位手性中心则通过不对称诱导而确立。

Literature adopted such method to prepare this series derivatives as in presence of sodium iodide and sodium carbonate or bicarbonate.

制备本类酯型衍生物的文献方法为：GCLE碘代后在碱性条件下与巯基物缩合。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。