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    • 2. 发明授权
    • Method of preparing chiral ketones from aldehydes
    • 从醛制备手性酮的方法
    • US09120721B2
    • 2015-09-01
    • US14359847
    • 2012-12-13
    • Nanyang Technological University
    • Yonggui ChiBhoopendra Tiwari
    • C07C211/00C07C205/00C07C207/00C07C221/00C07C201/12C07C205/02C07C205/44C07B41/06C07C225/14C07C225/16
    • C07C221/00C07B41/06C07C201/12C07C205/02C07C205/44C07C225/14C07C225/16
    • Present invention relates to a method of preparing a chiral α- or β-substituted ketone from the corresponding β- or γ-substituted aldehyde, wherein the ketone has formula (I), (III) or (V), and the corresponding aldehyde has formula (II), (IV) or (VI), respectively, the method comprising reacting the aldehyde of formula (II), (IV) or (VI) in the presence of an amine, oxygen and an organic solvent, wherein the reaction is carried out in the absence of a metal-based catalyst or a metal-based oxidant, wherein: R is H, a substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C15 alkenyl, substituted or unsubstituted C2-C15 alkynyl, substituted or unsubstituted C3-C15 cycloalkyl, substituted or unsubstituted C3-C15 cycloalkenyl, substituted or unsubstituted C3-C15 heterocycloalkyl, substituted or unsubstituted C3-C15 heterocycloalkenyl, substituted or unsubstituted C6-C15 aryl, or substituted or unsubstituted C6-C15 heteroaryl; and R′ is H, a substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C2-C15 alkenyl, substituted or unsubstituted C2-C15 alkynyl, substituted or unsubstituted C3-C15 cycloalkyl, substituted or unsubstituted C3-C15 cycloalkenyl, substituted or unsubstituted C3-C15 heterocycloalkyl, substituted or unsubstituted C3-C15 heterocycloalkenyl, substituted or unsubstituted C6-C15 aryl, or substituted or unsubstituted C6-C15 heteroaryl.
    • 本发明涉及从相应的β-取代醛或γ-取代醛制备手性α-或β-取代的酮的方法,其中酮具有式(I),(III)或(V),和相应的 醛分别具有式(II),(IV)或(VI),所述方法包括在胺,氧和有机溶剂的存在下使式(II),(IV)或(VI)的醛反应,其中 该反应在不存在金属类催化剂或金属类氧化剂的情况下进行,其中:R为H,取代或未取代的C 1 -C 10烷基,取代或未取代的C 2 -C 15烯基,取代或未取代的C 2 -C 15 取代或未取代的C 3 -C 15环烯基,取代或未取代的C 3 -C 15环烯基,取代或未取代的C 3 -C 15杂环烷基,取代或未取代的C 3 -C 15杂环烯基,取代或未取代的C 6 -C 15芳基或取代或未取代的C 6 -C 15杂芳基 ; 取代或未取代的C 1 -C 15烷基,取代或未取代的C 2 -C 15烯基,取代或未取代的C 2 -C 15炔基,取代或未取代的C 3 -C 15环烷基,取代或未取代的C 3 -C 15环烯基,取代或未取代的 C 3 -C 15杂环烷基,取代或未取代的C 3 -C 15杂环烯基,取代或未取代的C 6 -C 15芳基或取代或未取代的C 6 -C 15杂芳基。
    • 3. 发明授权
    • Method for preparing 2,3-dimethyl-2,3-dinitrobutane
    • 制备2,3-二甲基-2,3-二硝基丁烷的方法
    • US08692036B2
    • 2014-04-08
    • US13823831
    • 2011-09-05
    • Shengjian ZhangYingxian ZhaoHong Zhang
    • Shengjian ZhangYingxian ZhaoHong Zhang
    • C07C205/00
    • C07C201/14C07C201/06C07C205/02
    • The present invention relates to a method for preparing 2,3-dimethyl-2,3-dinitrobutane (DMNB), which includes the following steps: (1) making titanium-silicate molecular sieve catalyst, acetone, hydrogen peroxide and ammonia contact and react at 65-80° C. to obtain a modified titanium-silicate molecular sieve catalyst; and (2-1) making acetone oxime and hydrogen peroxide contact and react in the presence of the modified titanium-silicate molecular sieve catalyst and water under the conditions of temperature of 60-90° C. and pH of 8-10, and separating DMNB from the reaction products thereof; or (2-2) making acetone, ammonia and hydrogen peroxide contact and react in the presence of the modified titanium-silicate molecular sieve catalyst and water under the conditions of temperature of 60-90° C. and pH of 8-10, and separating DMNB from the reaction products thereof. By the method provided by the present invention, DMNB can be prepared without having to use dangerous chemicals, such as 2-nitropropane, NaH and the like.
    • 本发明涉及一种制备2,3-二甲基-2,3-二硝基丁烷(DMNB)的方法,其包括以下步骤:(1)使钛硅酸盐分子筛催化剂,丙酮,过氧化氢和氨接触并反应 在65-80℃下,得到改性钛酸酯分子筛催化剂; 和(2-1)使丙酮肟和过氧化氢接触并在改性的钛酸硅酸盐分子筛催化剂和水的存在下在60-90℃的温度和pH为8-10的条件下反应,并分离 DMNB反应产物; 或(2-2)使丙酮,氨和过氧化氢接触并在改性钛硅酸盐分子筛催化剂和水的存在下在60-90℃的温度和pH为8-10的条件下反应,和 从其反应产物中分离DMNB。 通过本发明提供的方法,可以制备DMNB,而不必使用危险化学品,例如2-硝基丙烷,NaH等。