会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 9. 发明授权
    • Use a catalyst system comprising nickel palladium or platinum and imidazoline-2-ylidene or imidazolidine-2-ylidene in stille coupling reactions
    • 在偶联反应中使用包含钯钯或铂和咪唑啉-2-亚基或咪唑烷-2-亚基的催化剂体系
    • US06362357B1
    • 2002-03-26
    • US09511654
    • 2000-02-22
    • Steven P. NolanJinkun HuangMark L. TrudellChunming Zhang
    • Steven P. NolanJinkun HuangMark L. TrudellChunming Zhang
    • C07C30929
    • C07D295/096B01J31/2265B01J31/2273B01J2231/4255B01J2531/824B01J2531/828B01J2531/847C07B37/04C07B43/04C07B49/00C07C1/321C07C41/30C07C67/293C07C67/343C07C209/10C07C213/08C07D295/023C07D295/073C07C69/76C07C69/157C07C43/20
    • This invention provides a process for conducting Stille coupling reactions. The processes of the present invention make use of N-heterocyclic carbenes as ancillary ligands in Stille couplings of aryl halides. A Stille coupling can be carried out by mixing, in a liquid medium, at least one strong base; at least one aryl halide or aryl pseudohalide in which all substituents are other than stannyl groups, wherein the aryl halide has, directly bonded to the aromatic ring(s), at least one halogen atom selected from the group consisting of a chlorine atom, a bromine atom, and an iodine atom; at least one organotin compound wherein the tin atom is quaternary, wherein one group bound to the tin atom is unsaturated at the alpha or beta position, and wherein each of the remaining groups bound to the tin atom is a saturated group; at least one metal compound comprising at least one metal atom selected from nickel, palladium, and platinum, wherein the formal oxidation state of the metal is zero or two; and at least one N-heterocyclic carbene. One preferred type of N-heterocyclic carbene is an imidazoline-2-ylidene of the formula wherein R1 and R2 are each, independently, alkyl or aryl groups having at least 3 carbon atoms, R3 and R4 are each, independently, a hydrogen atom, a halogen atom, or a hydrocarbyl group.
    • 本发明提供了进行Stille偶联反应的方法。 本发明的方法利用N-杂环卡宾作为芳基卤化物的Stille偶联中的辅助配位体。 Stille耦合可以通过在液体介质中混合至少一个强碱来进行; 至少一种芳基卤或芳基拟卤化物,其中所有取代基都不是甲锡烷基,其中所述芳基卤具有直接键合到所述芳族环上的至少一个卤素原子,所述卤素原子选自氯原子, 溴原子和碘原子; 至少一种有机锡化合物,其中锡原子是季铵,其中与锡原子结合的基团在α或β位是不饱和的,其中与锡原子结合的剩余基团中的每一个都是饱和基团; 至少一种金属化合物,其包含至少一种选自镍,钯和铂的金属原子,其中所述金属的形式氧化态为零或二; 和至少一个N-杂环卡宾。 N-杂环卡宾的一种优选类型是式R 2的咪唑啉-2-亚基,R 2各自独立地为具有至少3个碳原子的烷基或芳基,R 3和R 4各自独立地为氢原子, 卤素原子或烃基。