Alkyl radicals, from primary to tertiary, formed by photocatalyzed oxidation of organosilicates, are involved efficiently in radical carbonylation with carbon monoxide (CO), in the presence of various amines and CCl4, leading to a variety of amides in moderate to good yields.
Tandem Photoredox Catalysis: Enabling Carbonylative Amidation of Aryl and Alkylhalides
作者:José A. Forni、Nenad Micic、Timothy U. Connell、Geethika Weragoda、Anastasios Polyzos
DOI:10.1002/anie.202006720
日期:2020.10.12
visible‐light‐mediated carbonylative amidation of aryl, heteroaryl, and alkyl halides. A tandem catalytic cycle of [Ir(ppy)2(dtb‐bpy)]+ generates a potent iridium photoreductant through a second catalytic cycle in the presence of DIPEA, which productively engages aryl bromides, iodides, and even chlorides as well as primary, secondary, and tertiary alkyl iodides. The versatile in situ generated catalyst is compatible
Snipping tool: Zn(OTf)2 is an efficient catalyst for selective cleavage of amides bearing a β‐hydroxyethyl group on the nitrogen atom. The mechanism involves an N,O‐acyl rearrangement and transesterification. This new catalytic system can be applied to sequence‐specific peptide bond scission at the amine side of a serine residue. Tf=trifluoromethanesulfonyl.
DERIVATIVES OF FLUORENE, ANTHRACENE, XANTHENE, DIBENZOSUBERONE AND ACRIDINE AND USES THEREOF
申请人:Cholody Wieslaw M.
公开号:US20100137354A1
公开(公告)日:2010-06-03
Chemical agents, such as disulfonamide derivatives of fluorene, anthracene, xanthene, dibenzosuberone and acridine, and similar heterocyclic ring structures, including salts thereof, that act as anti-cancer and anti-tumor agents, especially where such agents modulate the activity of the Wnt/β-catenin signaling pathway, and serve to reduce β-catenin levels present in cells, such as cancer cells, or where the agents modulate levels of gene expression in cellular systems, including cancer cells, are disclosed, along with methods for preparing such agents, as well as pharmaceutical compositions containing such agents as active ingredients and methods of using these as therapeutic agents.
Substituted chroman-6-yloxy-cycloalkanes and their use as pharmaceuticals
申请人:SANOFI
公开号:US20160016928A1
公开(公告)日:2016-01-21
The present invention relates to substituted chroman-6-yloxy-cycloalkanes of the formula (I) in which Ar, R1 to R4, p and q are as defined in the claims. The compounds of the formula (I) are inhibitors of the sodium-calcium exchanger (NCX), especially of the sodium-calcium exchanger of subtype 1 (NCX1), and are suitable for the treatment of diverse disorders in which intracellular calcium homeostasis is disturbed, such as arrhythmias, heart failure and stroke. The invention furthermore relates to processes for the preparation of the compounds of the formula (I), their use as pharmaceuticals, and pharmaceutical compositions comprising them.