表状态
发表于 2025-3-23 12:41:55
Chiral phase transfer catalysis,e transfer catalysts still remain to be investigated further, in contrast to reactions with the use of achiral phase transfer catalysts. Since excellent reviews on the same subject covering the literature up to 1991 have already appeared , emphasis will be put on more recent work. However, earlier important results will also be mentioned.
乳汁
发表于 2025-3-23 15:39:49
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Abrade
发表于 2025-3-23 18:42:42
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忘川河
发表于 2025-3-24 00:26:53
Analytical applications of phase transfer catalysis,, gas chromatographic (GC) or liquid chromatographic (LC) separation, capillary electrophoretic separation and detection. An important tool to obtain compounds with favourable physico-chemical properties is the conversion of the analytes by means of a chemical derivatization procedure .
轻信
发表于 2025-3-24 04:26:10
M. Makosza,M. Fedorynski greater complexity and striking decoration. Many of the earliest still existing major works of civil engineering result from projects undertaken during this period: these include the digging of the Grand Canal, the development of urban planning, and the creation of Buddhist temples that still mark today’s skylines.
lipids
发表于 2025-3-24 06:30:30
Phase transfer catalysis in carbohydrate chemistry,An intermediate section describes the above two transformations in the context of nucleosides. The last section illustrates the reversed applications in which carbohydrate derivatives are now acting themselves as phase transfer catalysts.
踉跄
发表于 2025-3-24 13:12:58
Triphase catalysis,olution (liquid phase) and a swollen polymer catalyst (solid phase) and have been called liquid-liquid-solid (L-L-S) triphase reactions (catalysis). In common L-L-S triphase reactions with stirring, the organic phase and the solid catalyst disperse in the continuous aqueous phase (Fig. 13.1).
纯朴
发表于 2025-3-24 14:59:55
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rheumatism
发表于 2025-3-24 20:54:04
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自恋
发表于 2025-3-25 02:21:55
Phase transfer catalysis in oxidation processes,]. In the commercial production of oxygenated compounds, molecular oxygen is usually used as an oxidant. In synthetic applications, other oxidants, such as KMn0., K.Cr.0., NaOCl, NaI0., H.0. and hydroperoxides, or electrochemical processes are also employed for selective oxidation.