查询词典 butanal
- 与 butanal 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The asymmetric transformation of L-Pro via the formation of salt with S-tartaric acid was carried out by butanal as catalyst and butanoic acid as solvent to obtain D-Pro · S-TA salt.
实验研究了L一Pro的消旋反应,并获得刀乙一脯氨酸,然后在消旋的基础上研究L一Pro的不对称转换,最后得到D一Pro。
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The metabolites were mainly aldehydes and acids when the level of inoculation was 10~9cfu/ml, however, alcohols, acids and esters were produced when the level of inoculation was 10~8cfu/ml. The optimal temperature and pH for production of 3-methyl butanal were 40℃ and 7.0, but NaCl and NaNO_2 inhibited its production.
接种量不同会导致代谢BCAA的产物不同:接种量为10~9 cfu/ml时生成相应的醛和酸;接种量为10~8 cfu/ml时生成相应的醇、酸和酯。S52菌株在40℃,pH 7.0,无亚硝酸盐和NaCl的情况下产3-甲基丁醛的量最多。
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2S, 3S -2-methyl -3-benzoxyl butanal was obtained from cis-2-butene and acetaldehyde in 56. 3% yield through Brown Crotylation, oxidization, etc.
以顺-2-丁烯、乙醛为原料,经Brown Crotylation反应、氧化反应等,得到了(2S,3S)-2-甲基-3-苄氧基丁醛,收率为56.3%。
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D-proline was ob tamed from the asymmetric transformafion of L-proline via the formation of-tartaric acid salt by using butanal as catalyst.
以L-脯氨酸为起始原料,S-酒石酸为拆分剂,运用不对称转换的方法合成D-脯氨酸。
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Acetic acid ethenyl ester, polymer with ethenol, cyclic acetal with butanal
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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Furthermore, the main volatiles rom Hippophae rhamnoides included Nonane, Octane, 3-methyl-1-Butanol, Pentanal, 2-methyl- Butanal, 2-Hexen-1-ol, 2-Hexenyl benzoate in close natural state.
在近自然状态下,壬烷、辛烷、3-甲基丁醇、戊醛、2-甲基丁醛、2-壬烯醇、2-苯甲酸叶醇酯为沙棘枝叶主要挥发物组分。
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Firstly, 3-ethylthiobutanal was prepared from crotonaldehyde reacting with ethanehiol in triethylamine with high yield. Secondly, methyl acetoacetate was converted to 6-ethylthiohept-3-en-2-one by three steps via hydrolysis, condensation with 3-ethyltio-butanal and dehydration, then 6-ethylthiohept-3-en-2-one was cycloco ndensed with dimethyl malonate by Michael addition and Claisen condensation, followed by saponification and decarboxylation to give the intermediate of 5-(2-ethylthiopropyl)-cyclohexane-1,3-dione.
首先,以巴豆醛与乙硫醇为原料,在三乙胺的催化作用下高收率制得3-乙硫基丁醛;然后从乙酰乙酸甲酯出发,通过碱水解、与3-乙硫基丁醛缩合、脱水三步反应合成6-乙硫基-3-烯-2-庚酮,接着6-乙硫基-3-烯-2-庚酮与丙二酸二甲酯通过Michael加成和Claisen缩合成环,再通过皂化和脱羧反应生成中间体5-[2-丙基]-1,3-环己二酮;再与丙酸酐反应丙酰化,最后与0-3-氯-2-丙烯基羟胺肟化,得到目标化合物烯草酮。
- 推荐网络例句
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The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.
采用不同浓度K2CrO4(0,0.4,0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗,测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。
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By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.
通过分析数学形态学在图像中的理论基础,研究二值图像的形态分析算法,探讨最小结构元素的两种基本形态:膨胀和腐蚀;分析了数学形态学复杂算法的基本原理,把数学形态学的部分并行处理理念引入到家实际应用中。
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Have a good policy environment, real estate, secondary and tertiary markets can develop more rapidly and improved.
有一个良好的政策环境,房地产,二级和三级市场的发展更加迅速改善。