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- 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). 以罗通定为手性溶解剂,用核磁共振方法分析了几种外消旋羧酸。
- First, the required chiral auxiliary (+)- 23 was available in only moderate yield, requiring an impractically long period to produce (ca. 4 weeks). 第一;必须辅助手(+)-23只可适度产量;要求不切实际长期制作人(约占4周).
- Three strategies (additive, chiral auxiliary or chiral reagent) were developed to improve the diastereoselectivity or enantioselectivity of the ylide cyclopropanation reactions. 通过添加剂、手性辅基、手性试剂等3种策略,分别控制反应的非对映选择性和对映选择性。
- Owing to the special structure and properties, tert-leucine is an important intermediate in pharmaceutical production and a chiral auxiliary for asymmetric synthesis. 由于叔丁基的特殊结构和性质,叔亮氨酸是重要的医药中间体和不对称合成的手性诱导模板。
- The main focuses are the asymmetric allylation reactions of C=N double bonds through using chiral auxiliary groups, chiral allylation reagents, and asymmetric catalysts. 详细地综述了有关C=N双键立体选择性烯丙基化反应的研究进展。
- 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. 摘要糖作为一类具有多官能团、多手性中心、廉价易得的手性小分子可以很方便地作为手性助剂用于不对称合成。
- A series of optically active sulfenimines carryins new caniphor based mer-capto chiral auxiliaries have been synthesized. 合成了四种含樟脑巯基手性助剂的光学活性的硫亚胺化合物。
- 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. 近期进展是利用手性辅助试剂,不对称合成链状和环状的1,4-二羰基化合物。
- Keywords D （-）camphor sultam;Chiral auxiliary;Asymmetric synthesis; 樟脑磺内酰胺;手性助剂;不对称合成;
- Oxazo-type compounds mainly include oxazolidinone, oxazoline and oxazaborolidine.Usually they are used as chiral auxiliaries, chiral catalysts and chiral ligands in asymmetric reactions. 摘要聚合物支载恶唑类化合物主要包括聚合物支载恶唑烷酮、恶唑啉和硼杂恶唑啉等，其在不对称反应中主要用作手性助剂、手性催化剂及催化剂配体。
- Keywords optically active biaryl compound;biaryl coupling reaction;chiral auxiliary; 光学活性联芳基化合物;不对称二芳基偶联反应;手性配体;
- Keywords non-cross-polystyrene;supported;oxazolidinone;chiral auxiliary;synthesis; 线型聚苯乙烯;支载;恶唑烷酮;手性助剂;合成;
- mainly produce medical materials such as flumequine,propylthiouracil,carbamazepine,chiral auxiliary and pharmaceuicalintermediates. 主要产品有氟甲喹、丙硫氧嘧啶、卡马西平及手性助剂等原料药和各类医药中间体。
- We have an auxiliary generator in case of power cuts. 我们有一台万一断电时使用的备用发电机。
- It serves here as an auxiliary verb, as in sentence4.2a. 就像在句子4。2a一样，它在这儿做助动词。
- chiral auxiliary (reagent) [化] 手性助剂
- An aircraft takeoff aided by an auxiliary jet or rocket. 助飞用喷气机或火箭帮助航空器起飞
- L-Methyl glyoxylate is an important chiral reagent. 二羟乙酸L-薄荷酯是一种重要的手性试剂。
- The transfer of pages between real storage and auxiliary storage. 实存与辅存之间的页面传送(过程)。同pageturning。
- Such a carbon is designated as a chiral carbon. 这样的碳原子称为手性碳。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
