ortho-Olefination of Arylaldehyde O-Methyloximes through Palladium-Catalyzed C-H Activation
作者:Zhipeng Xu、Biao Xiang、Peipei Sun
DOI:10.1002/ejoc.201200393
日期:2012.6
Palladium(II)-catalyzed ortho-olefination of arylaldehydeO-methyloximes by using O-methyloxime as a directing group gave 2-alkenylarylaldehyde O-methyloximes in moderate to good yields. After various reaction parameters (catalyst, oxidant, solvent, and reaction temperature) were examined, the optimal conditions for the reaction were identified. 2-Alkenylarylaldehydes could be obtained conveniently
通过使用 O-甲基肟作为导向基团,钯 (II) 催化芳基醛 O-甲基肟的邻-烯烃化反应以中等至良好的产率得到 2-烯基芳基醛 O-甲基肟。在检查了各种反应参数(催化剂、氧化剂、溶剂和反应温度)后,确定了反应的最佳条件。2-烯基芳醛可以通过偶联产物的水解方便地获得。提供了 C-H 键活化的动力学同位素效应 (kH/kD),并提出了反应的可能机制。
INHIBITORS OF BRUTON'S TYROSINE KINASE
申请人:HOFFMANN-LA ROCHE INC.
公开号:US20150376166A1
公开(公告)日:2015-12-31
This application discloses compounds according to generic Formula (I): wherein all variables are defined as described herein, which inhibit BTK. The compounds disclosed herein are useful to modulate the activity of BTK and treat diseases associated with excessive BTK activity. The compounds are further useful to treat inflammatory and auto immune diseases associated with aberrant B-cell proliferation such as rheumatoid arthritis. Also disclosed are compositions containing compounds of Formula I and at least one carrier, diluent or excipient.
Selective<i>ortho</i>-Bromination of Substituted Benzaldoximes Using Pd-Catalyzed C–H Activation: Application to the Synthesis of Substituted 2-Bromobenzaldehydes
Substituted 2-bromobenzaldehydes were synthesized from benzaldehydes using a three-step sequence involving a selective palladium-catalyzed ortho-bromination as the key step. O-Methyloxime serves as a directing group in this reaction. A rapid deprotection of substituted 2-bromobenzaldoximes afforded substituted 2-bromobenzaldehydes with good overall yields.