Aerobic Pd-Catalyzed sp3 C−H Olefination: A Route to Both N-Heterocyclic Scaffolds and Alkenes
摘要:
This communication describes a new method for the Pd/polrxometalate-catalyzed aerobic olefination of unactivated sp(3)C H bonds. Nitrogen heterocycles serve as directing groups, and air is used as the terminal oxidant. The products undergo reversible intramolecular Michael addition, which protects the monoalkenylated product from overfunctionalization. Hydrogenation of the Michael adducts provides access to bicyclic nitrogen-containing scaffolds that are prevalent in alkaloid natural products. Additionally, the cationic Michael adducts undergo facile elimination to release alpha,beta-unsaturated olefins, which can be further elaborated via C-C and C-heteroatom bond-forming reactions.
据报道,使用各种伯,仲和叔烷基三氟硼酸酯进行光氧化还原催化的杂芳烃的CH官能化。描述了使用Fukuzumi的有机光催化剂和温和的氧化剂,适合于功能化复杂杂芳族化合物的条件,为后期衍生化提供了有价值的工具。报告的方法解决了先前报道的光氧化还原介导的Minisci反应的三个主要局限性:(1)使用超化学计量的自由基前体,(2)反复选择性,以及(3)引入昂贵的光催化剂。另外,使用了许多前所未有的复杂烷基,从而增加了Minisci化学可利用的化学空间。为了展示后期功能化中的应用程序,合成了奎宁和喜树碱类似物。最后,进行了NMR研究以提供合理的杂芳基活化作用,该活化作用允许使用单当量的自由基前体,并且还提高了区域选择性。因此,在酸催化剂和BF 3的存在下观察到1 H和13 C NMR观察到独特的杂芳基物质。
PYRAZOLOPYRIMIDINE JAK INHIBITOR COMPOUNDS AND METHODS
申请人:Blaney Jeffrey
公开号:US20120022043A1
公开(公告)日:2012-01-26
The invention provides JAK kinase inhibitors of Formula Ia, enantiomers, diasteriomers or pharmaceutically acceptable salts thereof, wherein R
1
, R
2
, R
7
and Z are defined herein, a pharmaceutical composition that includes a compound of Formula Ia and a pharmaceutically acceptable carrier, adjuvant or vehicle, and methods of treating or lessening the severity of a disease or condition responsive to the inhibition of a JAK kinase activity in a patient.
Compounds of formula Ia and Ib
wherein A, B, C and R
1
are described herein.
式Ia和Ib的化合物
其中A、B、C和R1
如本文所述。
AGENTS FOR TREATING PAIN AND USES THEREOF
申请人:ABBVIE INC.
公开号:US20140171423A1
公开(公告)日:2014-06-19
This invention relates to: (a) compounds and salts thereof that, inter alia, treat pain; (b) intermediates useful for the preparation of such compounds and salts; (c) compositions comprising such compounds and salts; (d) methods for preparing such intermediates, compounds, salts, and compositions; (e) methods of use of such compounds, salts, and compositions; and (f) kits comprising such compounds, salts, and compositions.
The present invention relates to a process to prepare a benzimidazole derivative useful as a medicament, an intermediate for preparing the medicament, and a process to prepare the intermediate.
The present disclosure provides phosphatidylinositol 3-kinase (PI3K) inhibitors of formula (I),
or pharmaceutically acceptable salts thereof, in which R
1
, R
2
, n, R
3
, R
4
, R
5
and R
6
are as defined herein. These compounds are useful for treatment of conditions mediated by one or more PI3K isoforms, such as PI3Kδ. The present disclosure further provides pharmaceutical compositions that include a compound of formula (I), or pharmaceutically acceptable salts thereof, and methods of using these compounds and compositions to treat conditions mediated by one or more PI3K isoforms, such as PI3Kδ.