查询词典 oxo

Then,the oxidation ofβ-ionone catalyzed by CMPS-Co_2 has been performed,andβ-ionone was oxidized to 4-oxo-β-ionone as the main product,and the influence of a series of different conditions for the reaction was also investigated.

首先将催化剂CMPS-Co_2应用于β-紫罗兰酮的催化氧化，主要得到4-氧代-β-紫罗兰酮，并考察了不同反应条件对β-紫罗兰酮选择性氧化的影响。

A total of 54 products were identified, including β-damascone, 4-oxo-β-ionone, 3,4,4-trimethyl-2-cyclohexen-1-one and 2,5,5-trimethyl-cyclohex-3-en-1-one.

根据4-氧代-β-大马酮裂解产物相对含量的变化规律，对其裂解产物的形成机理进行了探讨，认为4-氧代-β-大马酮可能按照4种途径发生裂解。

A series of L-histidine Schiff bases that include Sal-His (H2L^1), Br-Sal-His(H2L^2), NO2-Sal-His (H2L^3) and their Cu complexes were synthesized, and the catalytic behavior of Schiff-base-Cu for the oxidation of β-ionone to 4-oxo-β-ionone as well as the effects of substitutents on these properties were examined.

合成了芳环上含不同取代基的Schiff碱配体（水杨醛缩组氨酸(H2L^1)、5-溴水杨醛缩组氨酸(H2L^2)、5-硝基水杨醛缩组氨酸(H2L^3)及其铜配合物，研究了其作为催化剂应用于催化分子氧氧化β-紫罗兰酮制备4-氧代－β-紫罗兰酮中的行为。

The results indicated that β-ionone was catalytically oxidized to 5,6-epoxy-β-ionone, 4-oxo-β-ionone, 4-hydroxy-β-ionone, and a little dihydroactinidiolide.

结果表明，催化剂的催化性能与担载金的颗粒大小密切相关，同时溶剂的性质也对反应有明显影响。

The main product was 4-oxo-β-ionone with a yield of 50.2% and a purity over 98.5% under O2 pressure(1MPa) at 75℃ with additive pyridine over catalyst CuL^2 in 10h.

以CuL^2作催化剂，当反应时间为10h、反应温度为75℃、催化剂用量为1.6%、O2气压力为1MPa、添加摩尔分数为30%吡啶时，4-氧代－β-紫罗兰酮的收率为50.2%，纯度超过98.5%。

First, a series ofα-oxo ketene dithioacetals were preparated on the basis of our recent work.

具体研究如下：1。在十分温和的条件下，合成了一系列α-羰基二硫缩烯酮类化合物。2。

Therefore it is very important to explore the feadibility of clean synthesis lf complex compounds from a-oxo ketene dithioacetals

因此，以a-羰基二硫缩烯酮类化合物为合成子，探索复杂化合物的绿色合成方法将具有重要意义

Oxo ketene dithioacetals are a kind of versatile intermediates in organicsynthesis. It can be widely used in forming aromatic and heterocyclic compounds.

α-羰基二硫缩烯酮类化合物是一类重要的有机合成中间体，广泛应用于芳环和杂环化合物的合成中。

Second, we investigated the aldol reactions of the specialα-oxo ketene dithioacetals with aromatic aldehydes under the mild conditions in good yields.

在温和的条件(室温、30℃)下，高产率地实现了α-羰基二硫缩烯酮与芳香醛的缩合反应。3。

Among the variousα-oxo ketene dithioacetals,α-alkenoyl ketene dithioacetals are easier to prepare and bear much more functionalities.

在众多的α-羰基二硫缩烯酮类化合物中，α-烯酰基二硫缩烯酮具有易于制备，官能团多等特点。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。