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    At the room temperature, they could catalyze asymmetric additions of diethylzinc to various substrates including aromatic, aliphatic and α,β-unsaturated aldehydes in high yields (up to 99%) and excellent enantioselectivities (both enantiomers up to >99%ee).
    它们在室温条件下,就可以诱导二乙基锌对多种醛包括芳香醛、脂肪醛以及α,β-不饱和醛的不对称加成反应取得非常好的效果:反应收率普遍较高,最高达99%,(S)-产物的对映体选择性高达>99%ee值,(R)-产物的对映体选择性高达>99%ee值。
    SAA ligand Lh could induce asymmetric addition of terminal alkyne to aldehydes without using air-sensitive Ti(O~iPr)4and expensive Zn(OTf)2.with good result of high yield (up to 99%) and good enantioselectivities (up to 84%ee).
    将SAA配体Lh应用于在无Ti(O~iPr)_4和Zn(OTf)_2的条件下促进端基炔对醛的不对称加成反应中,反应的收率普遍较高,最高达99%,对映体选择性高达84%ee。
    SAA ligand Lg could catalyze asymmetric addition of phenylacetylene to unactivated aromatic ketones in high yields (up to 83%) and high enantioslectivities (up to 83%ee).
    SAA配体Lg用于催化炔基锌对未活化酮的不对称加成反应,对于芳香酮的催化反应,收率可达83%,对映体选择性可达83%ee。
    The expression rate of rAPC reached 41.3% of the total soluble proteins and the final optical cell density of the broth was 78, yielding up to gram level of rAPC with the purity over than 98% per batch operation.
    放大后的生产工艺基本稳定,雷普克表达量占菌体可溶性蛋白的41.3%,OD600达到78,纯化后雷普克纯度达到98%以上,生产规模达到克级水平。
    The spiro monophosphoramidite SIPHOS- 'Pr was the best ligand, providing the hydroformylation products in excellent yields (up to 99 %) with high regioselectivities (up to 97 %), and moderate enantioselectivities (up to 44 % ee).
    发现SIPHOS-~iPr配体的效果最好,它的铑络合物用于该反应得到非常好的收率(最高达99%)和区域选择性(最高达97%),但对映选择性仍然较低,ee值最高达到44%。
    Under the optimized conditions, theadduct cyanohydrins were obtained in excellent yields (up to 96%) with goodenantioselectivities (up to 82% ee), utilizing salen-Ti(IV) complex (10 mol%) andachiral phenolic N-oxide (1 mol%) as additives.
    经过条件筛选与优化实验,确定了优化的反应条件。 在优化条件下,采用10 mol%手性钛络合物和 1 mol%的非手性氮氧化物,催化酮的不对称硅腈化反应,收率高达96%,对映选择性达82% ee。
    Results indicated that the purity is 94.67% with the yield up to 68%.
    由高效液相法测得纯度为94.67%,收率达到68%。
    In such cases, the SDO yield up to 10.6±2.2% was achieved.
    通过测量SDO 的自发辐射光谱得到的SDO 产率的最大值为10.6±2.2%。
    A series of symmetrically tri-substituted triazines 3-10 were synthesized by solid grinding with yield up to 85%.
    采用固相研磨方法,合成了一系列对称三取代均三嗪衍生物3-10,分离产率最高可达85%;
    The desired aldol products were obtained with good yields (up to 93.2%) and enantioselectivities (up to 88.5%);
    所得产物的产率高(最高可达93.2%),对映选择性好(最高达88.5%)。
    Efficient enantioselective catalysis of aldol reactions of various benzaldehydes with acetone in excess of acetone as the solvent was achieved with high yield up to 91.0% and good selectivities (up to 88.5% ee) by using 5 mol% of the catalyst 5.
    以过量的丙酮作溶剂, 使用5 mol%该催化剂, 有效地催化了多种取代苯甲醛与丙酮间的不对称羟醛反应, 产率最高达91.0%, ee 最高达88.5%。
    This compound efficiently catalyzed the direct asymmetric aldol reaction with the yield up to 90.0% and enantiomeric excess up to 89.5%.
    该化合物对映选择性催化直接羟醛反应,产率最高达到90.0%,对映体过量最高达89.5。
    Used 4f as ligands, the ee values were up to 90% while yields up to 90% were obtained. Under the same conditions, we also used ligands 4f in the addition of phenylacetylene to the aliphatic ketone: isopropyl methyl ketone.
    在相同反应条件下,我们也试验了配体4f催化苯乙炔对脂肪酮(isopropyl methyl ketone,异丙基甲酮)的加成效果,可以得到54%ee值,产率可达到80%。
    When the conditions were optimized, exploring 20mol% of ligand 8a could catalyze the reaction with high enantioselectivity (up to 98% ee) and good yield (up to 92%).
    当反应条件被优化以后可得到更好的结果,92%产率和98%ee。
    The desired Aldol products were obtained with good yields (up to 96.0%) and enantioselectivities (up to 86.3%);
    所得产物的产率高(最高可达96.0%),对映选择性好(最高达86.3%)。
    1.2. The Addition of Phenylacetylene toα-keto ester Catalyzed by BINOL BINOL was evaluated as promotors in the asymmetric additions of phenylacetylene toα-keto ester, providing chiral propargylic alcohols derivations. The low yields (up to 35.7 %) and ee (7.7 %) were obtained
    1.2联萘酚催化的苯乙炔与α-酮酯的不对称加成反应以简单的联萘酚催化苯乙炔与α-酮酯的不对称加成反应,反应的产率及ee都不高,产率为:35.7 %,ee值为:7.7 %。
    1. A novel water-soluble chiral ligand (R, R)-[C6P2(NH)2(SO3Na)4] has been synthesized by sulfonation of chiral diaminodiphosphine ligand[(R, R)-C6P2 (NH)2] with a high yield (up to 96%).
    主要研究结果包括:1、利用手性双膦双胺配体[(R, R)-C6P2(NH)2]经发烟硫酸的磺化作用,合成了一类新型的水溶性手性配体[(R, R)-C6P2(NH)2(SO3Na)4],并获得了高达96%的产率。
    2-chloro-5-methylpyridine was chloridized with sulfuryl chloride and initiated with azobisisobutyronitrile to produce 2-chloro-5-chloromethylpyridine, that has a yield up to 65.9%.
    以2-氯-5-甲基吡啶为起始原料,以硫酰氯为氯化剂、偶氮二异丁腈为引发剂制备2-氯-5-氯甲基吡啶。 反应收率65.9%。
    Two new azoxybisbenzocrown ethers were synthesized. Preparative method of azo-xybisbenzo-15-crown-5 has been improved with the yield up to 65.3%.
    合成了两种新的氧化偶氮双苯并冠醚,改进了氧化偶氮双苯并15-冠-5的制备方法,使其收率提高到65.3%。
    The total C_2 to C_4olefin yield up to 41m%,in which 21m% is propylene,can be obtained fromprocessing Daqing VGO.
    以大庆减压馏分油为原料时,气体烯烃产率可达41m%,其中丙烯为21m%。
 

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