Asymmetric Hydrophosphination of Heterobicyclic Alkenes: Facile Access to Phosphine Ligands for Asymmetric Catalysis
作者:Zhiwu Lu、Haoyang Zhang、Zhiping Yang、Ning Ding、Ling Meng、Jun Wang
DOI:10.1021/acscatal.8b04787
日期:2019.2.1
Asymmetric hydrophosphination is the most atomically economical and straightforward approach to the construction of chiral organophosphorus compounds. Good stereoselectivities have been achieved in asymmetric hydrophosphination of an electron-deficient C═C double bond, but substrates involving nonpolar C═C bonds remain difficult and are rarely tackled. Herein, we report asymmetric hydrophosphination
Rh-Catalyzed Highly Enantioselective Hydroalkynylation Reaction of Norbornadiene Derivatives
作者:Baomin Fan、Jianbin Xu、Qingjing Yang、Sifeng Li、Hualei Chen、Shanshan Liu、Lu Yu、Yongyun Zhou、Lin Wang
DOI:10.1021/ol402804t
日期:2013.12.6
The complexes of various Rh precusors with ferrocenyl chiral ligand (R,S)-Cy2PF-PPh2 were found effective catalysts for the asymmetrichydroalkynylation reaction of norbornadiene derivatives. When RhCl3·3H2O was employed, good yields (up to 98%) and high enantioselectivities (up to >99.9% ee) could be obtained for the reactions of a broad scope of substrates.
AbstractA chiral palladium/copper (Pd/Cu) co‐catalytic system which could enable asymmetric ring opening reaction of azabenzonorbornadienes with terminal alkynes is reported. This system comprises palladium(II) acetate [Pd(OAc)2]/(R)‐xyl‐Binap and copper(I) triflate (CuOTf). A good substrate scope was found, with excellent enantioselective outcomes (up to >99.9 % ee). A reaction mechanism involving two metal complexes is also proposed.magnified image
The Aryne aza-Diels–Alder Reaction: Flexible Syntheses of Isoquinolines
time-efficient preparation of a variety of functionalized aromatic heterocyclic products exhibiting an isoquinoline core. The approach is based on the normal electron-demand [4 + 2] aza-Diels–Alder cycloaddition of electron-rich N-aryl imines with arynes. Using this strategy, an expeditious total synthesis of the naturally occurring benzo[c]phenanthridinealkaloid nornitidine was achieved.
已经开发了两个级联反应,以高效地制备具有异喹啉核心的各种功能化芳族杂环产物。该方法基于富电子的N-芳基亚胺与芳烃的正常电子需求[4 + 2] aza-Diels-Alder环加成反应。使用该策略,可以快速合成天然存在的苯并[ c ]菲啶生物碱去甲替尼丁。
[EN] COMPOUNDS AND COMPOSITIONS FOR TREATING CNS DISORDERS<br/>[FR] COMPOSÉS ET COMPOSITIONS POUR LE TRAITEMENT DE TROUBLES DU SNC
申请人:BLUE OAK PHARMACEUTICALS INC
公开号:WO2021138315A1
公开(公告)日:2021-07-08
The present disclosure provides compounds and pharmaceutical compositions thereof. Methods of making and using the compounds are also provided. The compounds can be used for the treatment, prevention, diagnosis and/or management of various CNS disorders.