Synthesis of Cyclic Amidines by Iridium-Catalyzed Deoxygenative Reduction of Lactams and Tandem Reaction with Sulfonyl Azides
作者:Youliang He、Xiaoming Wang
DOI:10.1021/acs.orglett.0c03953
日期:2021.1.1
An efficient and convenient synthesis of various cyclic amidines has been achieved via iridium-catalyzed deoxygenative reduction of lactams with a silane followed by a one-pot cycloaddition reaction with sulfonyl azides. Using the novel tandem procedure, a large array of cyclic amidines bearing various sized rings were synthesized in good yields from readily available lactams. This methodology has
BENZIMIDAZOLE DERIVATIVES AS BROMODOMAIN INHIBITORS
申请人:Gilead Sciences, Inc.
公开号:US20140336190A1
公开(公告)日:2014-11-13
This application relates to chemical compounds which may act as inhibitors of; or which may otherwise modulate the activity of, a bromodomain-containing protein, including bromodomain-containing protein 4 (BRD4), and to compositions and formulations containing such compounds, and methods of using and making such compounds. Compounds include compounds of Formula (I)
wherein R
1a
, R
1b
, R
2
, R
2b
, R
3
, R
4a
, R
4b
, and R
5
are described herein.
Benzofused lactams, especially indolin‐2‐one and dihydroquinolin‐2‐one are popular structural motives in durgs and natural products. Herein, we developed a room temperature and robust synthesis of benzofused lactams through cobalt(III)‐catalyzed C(sp2)−H amidation. In this protocol, in‐situ formation of Cp*Co(III)(ligand) catalyst from Cp*Co(CO)I2 and ligand simplify the synthetic effort of cobalt
Herein, a photocatalyzed, intramolecular C(sp2)−H amidation of N-benzoyloxyamides has been developed to afford δ-benzolactams with an aryl-alkyl σ-bond relocation. Upon the formation of amidyl radical via reductive N−O bond cleavage, selective radical ipso-addition followed by a redox-neutral radical–polar crossover was suggested to be responsible for the preferential C−C bond migration.