A series of [2-[(omega-aminoalkoxy)phenyl]ethyl]benzene derivatives were synthesized and evaluated for their ability to inhibit collagen-induced platelet aggregation in vitro and to protect experimental thrombosis in mice. The results showed that the compounds were in vitro inhibitors of collagen-induced platelet aggregation. Most of them were also effective in the mouse antithrombotic assay. The compounds
Rhodium(III)-Catalyzed C–H Olefination for the Synthesis of <i>ortho</i>-Alkenyl Phenols Using an Oxidizing Directing Group
作者:Yangyang Shen、Guixia Liu、Zhi Zhou、Xiyan Lu
DOI:10.1021/ol4014188
日期:2013.7.5
By using an oxidizing directinggroup, a mild, efficient Rh(III) catalyzed C–H olefination reaction between N-phenoxyacetamides and alkenes was developed. This reaction provided a straightforward way for the synthesis of ortho-alkenyl phenols, and the directinggroup is traceless in the product.
facilitated not only C–O bondcleavage but also the insertion of the C═Cbond into the Rh–Ph bond. These strategies and mechanistic insights were successfully applied to develop a strategy for the Rh-catalyzed cross-coupling reaction of fused vinylic ethers, benzofurans, and aryl Grignard reagents, wherein the bondcleavage occurred selectively at the vinylic C(sp2)–O bond, even in the presence of
Herein, we have designed and demonstrated a copper-catalyzed intramolecular SEAr reaction−oxidation process to access styryl-/alkenyl-substituted xanthone derivatives. This protocol affords a variety of substituted xanthone derivatives in moderate to high yields. The protocol has been demonstrated by gram-scale syntheses.
在此,我们设计并展示了一种铜催化的分子内 S E Ar 反应-氧化过程,以获得苯乙烯基/烯基取代的氧杂蒽酮衍生物。该协议提供了多种中等至高产率的取代氧杂蒽酮衍生物。该协议已通过克级合成得到证明。
One-Step Synthesis of Substituted Benzofurans from <i>ortho</i>
- Alkenylphenols <i>via</i>
Palladium-Catalyzed CH Functionalization
作者:Dejun Yang、Yifei Zhu、Na Yang、Qiangqiang Jiang、Renhua Liu
DOI:10.1002/adsc.201600082
日期:2016.6.2
A dehydrogenative oxygenation of C(sp2)H bonds with intramolecular phenolic hydroxy groups has been developed, which provides a straightforward and concise access to structurally diversely benzofuransfrom ortho‐alkenylphenols. The reaction is catalyzed by palladium on carbon (Pd/C) without any oxidants and sacrificing hydrogen acceptors.