查询词典 annulation
- 与 annulation 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Breakfast is not included in the price and costs 6,30 per person.En cas d'annulation tardive ou de no show, 1 nuit sera facturée.
如果您选择并预订的房间已标明是"预缴/不予发还(PREPAID/NOT REFUNDABLE)"的房型。
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En cas d'annulation tardive ou no-show , l'htel débitera une nuit In case of late cancellation or no-show, the hotel will charge for one night.
这种情况,您的入住总额将会在您预订的时候从您的信用卡支取。
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L-prolinamide/PPTS system was developed to catalyze Robinson annulation of 1,3-cyclohexanedione derivatives. Using this system, the functionalized carbon chain of Wieland-Wiescher ketone could be synthesized in high enantioselectivity, which was a useful synthon for structural diversity of total synthesis of natural product.
二、发现了L-prolinamide/PPTS体系可以催化Ronbinson环化1,3-环己二酮衍生物,实现含季碳且具有多官能团侧链的Wieland-Wiescher酮高对映选择性的合成,为天然产物结构多样性的合成奠定了基础。
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Functionalized propargylic dithioacetals have been applied to one-pot furan annulation to afford the corresponding functionalized oligoaryls.
中文摘要应用官能基化的炔丙基硫缩酮进行一锅式呋喃稠合反应,可产生相对应之寡联芳香环化合物。
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Breakfast is not included in the price and costs 8,00.En cas d'annulation tardive ou de no show, 1 nuit sera facturée.
如果您选择并预订的房间已标明是"预缴/不予发还(PREPAID/NOT REFUNDABLE)"的房型。
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Recently, we have detailed a new series of furan-containing teraryl cyclophene derivatives 40a-f and 67. And two keys to syntheses were one-pot furan annulation and the McMurry reaction.
过去我们已成功地利用呋喃成环反应,与McMurry反应合成到一系列的含呋喃之[n.2]环芃烯40a-f与环芃双烯67。
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A novel endocyclic enamine cyclopentenone annulation was discovered and rationalized as an unusual Nazarov-type electrocyclization, which would have broad applications in the synthesis of natural alkaloids and other heterocycles.
我们在合成路线一、路线二中用的6-6元环系到7-5元环系的还原重排反应,在温和的酸性还原条件下即能发生,这说明在三尖杉碱的生物合成中6-6元环到7-5元环的还原重排步骤是非常有可能发生的;因此,我们的合成路线二中可认为是生物合成过程。
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We have had the extensive studies on theα-acetyl-α-carbamoyl ketene--acetals and its further applications, for example, their adols condensations with aldehydes giveα-alkenoyl-α-carbamoyl ketene--acetals which can be utilized as the 1,5-bielectronic five-carbon components to react with various binucleophlilic species in a [5+1] annulation.
我们小组在以前的工作中对α-乙酰基-α-胺甲酰基二硫缩烯酮在合成中的应用进行了深入的研究,如与醛缩合生成α-烯酰基-α-胺甲酰基二硫缩烯酮,将其作为1,5-双亲电五碳合成子的[5+1]成环策略等。
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In this thesis, a convenient and efficient synthesis of highly functionalizeddihydropyrido[2,3-d]pyrimidines via a double [5 + 1] annulation strategy startingfrom easily available α-alkenoyl-α-carbamoyl ketene--acetals 1 and cheapreagents (NH4OAc, DMF, and POCl3) has been developed.
本论文探索了一种简便有效的合成高度官能化的二氢吡啶并[2,3-d]嘧啶的方法,此方法由易得的α-乙酰基-α-氨基乙酰基二硫缩烯酮1和便宜的试剂(醋酸铵,二甲基甲酰胺和三氯氧磷)通过两步[5 + 1]加成而实现。
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For the synthesis of NHC precursors, there are also several routes: condensation of glyoxal, amines and paraformaldehyde; alkylation of imidazole or monosubstituted imidazole with alkyl halide; annulation of ortho esters and 1,2-diamines; ring closure of hydrazines or amides with acetic anhydride; reduction of thiones with Na/K in THF.
关于N-杂环卡宾前体的合成途径主要有:乙二醛、伯胺和多聚甲醛的缩合反应;卤代烷与咪唑及其取代咪唑的烷基化反应;原甲酸酯与1,2-二胺的成环反应;肼或酰胺与酸酐的环化反应;用Na/K对环硫脲化合物的还原反应。
- 推荐网络例句
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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.
随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。
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But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.
不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。
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Closes the eye, the deep breathing, all no longer are the dreams as if......
关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。