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- Three strategies (additive, chiral auxiliary or chiral reagent) were developed to improve the diastereoselectivity or enantioselectivity of the ylide cyclopropanation reactions. 通過(guò)添加劑、手性輔基、手性試劑等3種策略,分別控制反應的非對映選擇性和對映選擇性。
- Rotundine was used as chiral auxiliary for NMR analysis of racemic carboxylic acids and it turned out to be an effective chiral solvating agent(CSA). 以羅通定為手性溶解劑,用核磁共振方法分析了幾種外消旋羧酸。
- First, the required chiral auxiliary (+)- 23 was available in only moderate yield, requiring an impractically long period to produce (ca. 4 weeks). 第一;必須輔助手(+)-23只可適度產(chǎn)量;要求不切實(shí)際長(cháng)期制作人(約占4周).
- In the exposition of fearnaught technology, the relaxation of fiber, fiber-mixed and the choice of auxiliary reagent is elaborated. 在和毛工藝的闡述中，對纖維的開(kāi)松、混合、給助劑及相關(guān)助劑的選擇做了詳細的論述;
- Owing to the special structure and properties, tert-leucine is an important intermediate in pharmaceutical production and a chiral auxiliary for asymmetric synthesis. 由于叔丁基的特殊結構和性質(zhì),叔亮氨酸是重要的醫藥中間體和不對稱(chēng)合成的手性誘導模板。
- The main focuses are the asymmetric allylation reactions of C=N double bonds through using chiral auxiliary groups, chiral allylation reagents, and asymmetric catalysts. 詳細地綜述了有關(guān)C=N雙鍵立體選擇性烯丙基化反應的研究進(jìn)展。
- Carbohydrate, with multi-functional groups and chiral centers in one small molecule, is inexpensive and can be converted into efficient chiral auxiliary for controlling asymmetric synthesis. 摘要糖作為一類(lèi)具有多官能團、多手性中心、廉價(jià)易得的手性小分子可以很方便地作為手性助劑用于不對稱(chēng)合成。
- The paper expounded theory, characteristics, using range and auxiliary reagent of hydrochloric acid, hydrofluoric acid, citric acid, EDTA and made simple introduction to their craft and use instances, when cleaning the boiler can take reference. 摘要對鹽酸、氫氟酸、檸檬酸、乙二胺四乙酸四種鍋爐常用化學(xué)清洗劑的清洗原理、特點(diǎn)、使用范圍，以及配套助劑進(jìn)行詳細的闡述，并對四種清洗劑的清洗工藝及應用實(shí)例進(jìn)行了簡(jiǎn)單介紹，可在鍋爐清洗時(shí)進(jìn)行參考。
- auxiliary reagent for negative photoresist 負性膠配套試劑
- auxiliary reagent for positive photoresist 正性膠配套試劑
- A series of optically active sulfenimines carryins new caniphor based mer-capto chiral auxiliaries have been synthesized. 合成了四種含樟腦巰基手性助劑的光學(xué)活性的硫亞胺化合物。
- chiral auxiliary (reagent) [化] 手性助劑
- The jute fiber was treated by two different methods: built additive auxiliary reagents pretreatment,alkali treatment,water treatment. 對黃麻纖維進(jìn)行三種預處理:復配助劑處理、堿處理、水處理。
- Recent developments making use of chiral auxiliaries have put forward the versatility of procedure for the asymmetric synthesis of linear and cyclic 1,4-dicarbonyl compounds. 近期進(jìn)展是利用手性輔助試劑,不對稱(chēng)合成鏈狀和環(huán)狀的1,4-二羰基化合物。
- L-Methyl glyoxylate is an important chiral reagent. 二羥乙酸L-薄荷酯是一種重要的手性試劑。
- Keywords D （-）camphor sultam;Chiral auxiliary;Asymmetric synthesis; 樟腦磺內酰胺;手性助劑;不對稱(chēng)合成;
- Oxazo-type compounds mainly include oxazolidinone, oxazoline and oxazaborolidine.Usually they are used as chiral auxiliaries, chiral catalysts and chiral ligands in asymmetric reactions. 摘要聚合物支載惡唑類(lèi)化合物主要包括聚合物支載惡唑烷酮、惡唑啉和硼雜惡唑啉等，其在不對稱(chēng)反應中主要用作手性助劑、手性催化劑及催化劑配體。
- Keywords optically active biaryl compound;biaryl coupling reaction;chiral auxiliary; 光學(xué)活性聯(lián)芳基化合物;不對稱(chēng)二芳基偶聯(lián)反應;手性配體;
- Keywords non-cross-polystyrene;supported;oxazolidinone;chiral auxiliary;synthesis; 線(xiàn)型聚苯乙烯;支載;惡唑烷酮;手性助劑;合成;
- mainly produce medical materials such as flumequine,propylthiouracil,carbamazepine,chiral auxiliary and pharmaceuicalintermediates. 主要產(chǎn)品有氟甲喹、丙硫氧嘧啶、卡馬西平及手性助劑等原料藥和各類(lèi)醫藥中間體。
