5736-03-8Relevant articles and documents
Preparation method of antitumor drug gemcitabine hydrochloride
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Paragraph 0045; 0049; 0054-0055, (2020/12/31)
The invention discloses a preparation method of an antitumor drug gemcitabine hydrochloride. The preparation method specifically comprises the following processes: (1) preparing an antitumor drug gemcitabine hydrochloride intermediate: Step 1, synthesis of T1; Step2, synthesis of T2; Step3, synthesis of T3; Step4, synthesis of T4; Step5, synthesis of T5; and Step6, synthesis of T6; and (2) preparing gemcitabine hydrochloride from the gemcitabine hydrochloride intermediate: Step7, firstly reducing T6 with lithium tri (tert-butoxy) aluminum hydride, and then acylating with paratoluensulfonyl chloride to prepare T7, wherein T7 is 2-deoxy-2, 2-difluoro-D-ribofuranose-3, 5-dibenzoate; and Step8, reacting T7 with cytosine under the action of a catalyst to generate T8, wherein T8 is 2'-deoxy-2',2'-difluorocytidine-D-ribofuranose-3',5'-dibenzoate. The preparation method of the antitumor drug gemcitabine hydrochloride has the advantages of low production cost, favorability for industrial production and small environmental pollution.
Method for catalytic synthesis for glyceraldehyde acetonide
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Paragraph 0056-0059, (2018/11/22)
The invention relates to a method for catalytic synthesis for glyceraldehyde acetonide. The method specifically comprises the following steps: dissolving glycerol acetonide into acetone, adding a proper amount of a fullerene zinc oxide selenium (C60/ZnO/Se) composite material, introducing oxygen to carry out a reaction at a room temperature till a reaction liquid has no glycerol acetonide, centrifuging to remove the fullerene zinc oxide selenium (C60/ZnO/Se) composite material, carrying out vacuum concentration on supernate, and drying to obtain the glyceraldehyde acetonide.
Synthesis of Cryptochiral (R,R)-2,3-Dideuterooxirane as Stereochemical Reference Compound and Chemical Correlation with D-(+)-Glyceraldehyde
Trapp, Oliver,Zawatzky, Kerstin
, p. 1082 - 1090 (2016/11/23)
Chirality plays a pivotal role in chemistry and biology, e.g., structure-specific targeting in drug development or the lock-and-key theory of enzyme interactions. Determining absolute configurations of chiral molecules is essential to understanding such mechanisms and to developing chemical processes involving chiral compounds. In particular, this becomes obvious in the understanding of chemical reaction networks in the context of the origins of life. A stereochemical reference compound that can be correlated with sugars, amino acids, etc. is of great interest. Here, we present the synthesis of enantiopure (R,R)-2,3-dideuterooxirane, of which the absolute configuration has been unambiguously determined by foil-induced Coulomb explosion imaging, and the correlation with the configuration of D-(+)-glyceraldehyde.