A highlyefficient synthesis of novel spirocyclic benzoxazine‐indenes from benzoxazine and alkynes via iminedirected C–H activation/annulation using rhodium catalyst was reported. The methodology could be applied to various benzoxazines and alkynes, giving the corresponding spiro indenyl benzoxazine as spirocycle products in good yields.
A chiral Lewisbaseorganocatalyzedenantioselectivehydrosilylation of 1,4-benzoxazines is presented. The reactions afforded various enantioenriched 3-substituted dihydro-2 H -1,4-benzoxazines with high yields (up to 98%) in moderate enantioselectivities (up to 87% ee).
提出了一种手性路易斯碱有机催化的 1,4-苯并恶嗪的对映选择性氢化硅烷化。该反应以中等对映选择性(高达 87% ee)的高产率(高达 98%)提供了各种对映体富集的 3-取代二氢-2 H -1,4-苯并恶嗪。
Asymmetric Pnictogen-Bonding Catalysis: Transfer Hydrogenation by a Chiral Antimony(V) Cation/Anion Pair
作者:Jian Zhang、Jun Wei、Wei-Yi Ding、Shaoyu Li、Shao-Hua Xiang、Bin Tan
DOI:10.1021/jacs.1c02808
日期:2021.5.5
Pnictogen-bonding catalysisbased on σ-hole interactions has recently attracted the attention of synthetic chemists. As a proof-of-concept for asymmetric pnictogen-bonding catalysis, we report herein an enantioselective transfer hydrogenation of benzoxazines catalyzed by a novel chiral antimony cation/anion pair. The chiral pnictogen catalyst library could be rapidly accessed from triarylstibine with
[EN] INHIBITORS OF HIF PROLYL HYDROXYLASE<br/>[FR] INHIBITEURS DE LA HIF PROLYL-HYDROXYLASE
申请人:MERCK SHARP & DOHME
公开号:WO2016049099A1
公开(公告)日:2016-03-31
The present invention concerns compounds of formula I or pharmaceutically acceptable salts thereof, which inhibit HIF prolyl hydroxylase, their use for enhancing endogenous production of erythropoietin, and for treating conditions associated with reduced endogenous production of erythropoietin such as anemia and like conditions, as well as pharmaceutical compositions comprising such a compound and a pharmaceutical carrier.
Electrochemical Synthesis of Hindered Primary and Secondary Amines via Proton-Coupled Electron Transfer
作者:Dan Lehnherr、Yu-hong Lam、Michael C. Nicastri、Jinchu Liu、Justin A. Newman、Erik L. Regalado、Daniel A. DiRocco、Tomislav Rovis
DOI:10.1021/jacs.9b10870
日期:2020.1.8
Accessing hindered amines, particularly primary amines α to a fully substituted carbon center, is synthetically challenging. We report an electrochemical method to access such hindered amines starting from benchtop-stable iminium salts and cyanoheteroarenes. A wide variety of substituted heterocycles (pyridine, pyrimidine, pyrazine, purine, azaindole) can be utilized in the cross-coupling reaction