Cyanoborohydrides are efficient reagents in the reductive addition reactions of alkyl iodides and electron-deficient olefins. In contrast to using tinreagents, the reaction took place chemoselectively at the carbon–iodine bond but not at the carbon–bromine or carbon–chlorine bond. The reaction system was successfully applied to three-component reactions, including radical carbonylation. The rate constant
氰基硼氢化物是烷基碘化物和缺电子烯烃的还原加成反应中的有效试剂。与使用锡试剂相反,该反应在碳碘键上发生化学选择,而在碳溴或碳氯键上没有发生。该反应体系已成功应用于三组分反应,包括自由基羰基化。通过动力学竞争法,在25°C下从氰基硼氢化四丁基铵中伯烷基脱氢的速率常数估计为<1×10 4 M –1 s –1。该值比氢化三丁基锡的值小3个数量级。
FUSED HETEROCYCLIC COMPOUNDS USEFUL AS MODULATORS OF NUCLEAR HORMONE RECEPTOR FUNCTION
申请人:Norris Derek J.
公开号:US20100331324A1
公开(公告)日:2010-12-30
Disclosed are fused heterocyclic compounds of Formula (I) or pharmaceutically-acceptable salts or stereoisomers thereof. Also disclosed are methods of using such compounds in the treatment of at least one androgen receptor-associated condition, such as, for example, cancer, and pharmaceutical compositions comprising such compounds.
METHOD FOR PRODUCING PURIFIED POLYTETRAFLUOROETHYLENE AQUEOUS DISPERSION LIQUID, METHOD FOR PRODUCING MODIFIED POLYTETRAFLUOROETHYLENE POWDER, METHOD FOR PRODUCING POLYTETRAFLUOROETHYLENE MOLDED BODY, AND COMPOSITION
申请人:Daikin Industries, Ltd.
公开号:EP3666802A1
公开(公告)日:2020-06-17
An object of the present invention is to obtain an aqueous dispersion of polytetrafluoroethylene in which compounds containing fluorine are removed or reduced. The present invention is a method for producing an aqueous dispersion of purified polytetrafluoroethylene, the method including: removing or reducing a compound represented by Formula (1) or (2) below from an aqueous dispersion of polytetrafluoroethylene obtained using a hydrocarbon surfactant:
Formula (1): (H-(CF2)m-COO)pM1; or
Formula (2): (H-(CF2)n-SO3)qM2.
Facile synthesis of 1,4-diketones via palladium complex catalyzed isomerization of alkynediols
作者:Xiyan Lu、Jianguo Ji、Dawei Ma、Wei Shen
DOI:10.1021/jo00020a015
日期:1991.9
Alkynediols isomerized under the catalysis of Pd2(dba)3.CHCl3 + 2n-Bu3P in acetonitrile at 80-degrees-C to give 1,4-diketones in high yields. This experimentally simple and economically synthetic method is illustrated with examples including substituents such as alkyl, alkenyl, and aryl groups. The order of reactivity of the substituents in this reaction is aryl greater-than-or-equal-to alkenyl > alkyl. Alkenyl-substituted alkynediols chemoselectively isomerized to the corresponding alpha,beta-unsaturated 1,4-diketones. The usefulness of this novel method is exemplified by the synthesis of dihydrojasmone.