[EN] NOVEL LIGANDS THAT ARE ANTAGONISTS OF RAF RECEPTORS, PROCESS FOR PREPARING THEM AND USE THEREOF IN HUMAN MEDICINE AND IN COSMETICS [FR] NOUVEAUX LIGANDS QUI SONT DES ANTAGONISTES DES RECEPTEURS RAR, PROCEDE DE PREPARATION DE CES LIGANDS ET UTILISATION DE CES LIGANDS DANS LES DOMAINES DE LA MEDECINE HUMAINE ET DE LA COSMETIQUE
Total synthesis of indiacen A using a practical one-pot reaction: Promoted by a key waste product, and its utility in natural products synthesis
作者:Lihua Wang、Ting Lei、Fusheng Wang、Shizhi Jiang、Guiyang Yan
DOI:10.1016/j.tetlet.2021.152822
日期:2021.3
waste product in the Heck reaction, was found to act as a key catalyst in the practical one-pot Heck-dehydration reaction. A concisesynthesis of indiacen A was accomplished in 92% overall yield using a protecting-group-free and redox-neutral strategy. In this synthesis, a novel one-pot reaction with high regio- and stereo-selectivity was developed and further application in the total synthesis of other
Novel ligand antagonists of RAR receptors and pharmaceutical/cosmetic applications thereof
申请人:Diaz Philippe
公开号:US20050234131A1
公开(公告)日:2005-10-20
Novel ligand antagonists of the RAR receptors have the following structural formula (1):
in which A is a CH
2
, CHOH, C═O or C═N—OH radical or a sulfur or selenium atom; B is a radical selected from among those of formulae (a) to (f):
and Ar is a radical selected from among those of formulae (g) to (i):
Simple and efficient syntheses of murraol and (E)-suberenol were accomplished in just three simple steps from cheap and readily available 4-methoxysalicylaldehyde implementing a protecting-group-free and redox-neutral strategy. In the adopted approach, a practical regioselective bromination reaction and a high yield Mizoroki-Heck reaction from previously inactive bromocoumarin were conducted. This
简单而有效的 murraol 和 ( E )-suberenol 的合成只需三个简单的步骤,从廉价且容易获得的 4-甲氧基水杨醛实施无保护基和氧化还原中性策略。在所采用的方法中,进行了实用的区域选择性溴化反应和来自先前非活性溴香豆素的高产 Mizoroki-Heck 反应。这种新建立的高产、克级合成方法进一步为一系列新型二聚天然产物的正式合成提供了条件。
Nickel-Catalyzed Cross-Coupling Reaction of Aryl Methyl Sulfides with Aryl Bromides
作者:Chuntao Zhong、Mengna Liu、Xianchao Qiu、Hao Wei、Benqiang Cui、Yanhui Shi、Changsheng Cao
DOI:10.1021/acs.joc.3c00630
日期:2023.10.6
A nickel-catalyzedcross-couplingreaction of aryl methyl sulfides with aryl bromides has been developed to access biaryls in yields of up to 86%. The reactions proceeded well using Ni(COD)2 as catalyst with the ligand BINAP (2,2′-bis(diphenylphosphanyl)-1,1′-binaphthalene) in the presence of magnesium. The method has a broad scope of substrates and is scalable. The wide availability of commercially