A general palladium-catalyzedsynthesis of linear esters directly from sec- and tert-alcohols is described. Compared to the classic Koch–Haaf reaction, which leads to branched products, this new transformation gives the corresponding linear esters in high yields and selectivity. Key for this protocol is the use of an advanced palladium catalyst system with L2 (pytbpx) as the ligand. A variety of aliphatic
直接从直链酯的一般钯催化合成的仲-和叔-醇进行说明。与导致分支产物的经典科赫-哈夫反应相比,这种新的转化以高收率和选择性提供了相应的线性酯。该协议的关键是使用具有L2(py t bpx)作为配体的高级钯催化剂体系。可以直接使用多种脂族和苄醇,基准反应的催化剂效率非常出色(周转数高达89 000)。
Substituted imidazoles as bombesin receptor subtype-3 modulators
申请人:Chen David
公开号:US20100004280A1
公开(公告)日:2010-01-07
Certain novel substituted imidazoles are ligands of the human bombesin receptor and, in particular, are selective ligands of the human bombesin receptor subtype-3 (BRS-3). They are therefore useful for the treatment, control, or prevention of diseases and disorders responsive to the modulation of BRS-3, such as obesity, and diabetes.
SUBSTITUTED IMIDAZOLES AS BOMBESIN RECEPTOR SUBTYPE-3 MODULATORS
申请人:Chen David
公开号:US20120088788A1
公开(公告)日:2012-04-12
Certain novel substituted imidazoles are ligands of the human bombesin receptor and, in particular, are selective ligands of the human bombesin receptor subtype-3 (BRS-3). They are therefore useful for the treatment, control, or prevention of diseases and disorders responsive to the modulation of BRS-3, such as obesity, and diabetes.
[EN] DIHYDROPYRIMIDINE COMPOUND, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF<br/>[FR] COMPOSÉ DE DIHYDROPYRIMIDINE, SON PROCÉDÉ DE PRÉPARATION ET SON APPLICATION<br/>[ZH] 一种二氢嘧啶类化合物、其制备方法及应用
Discovery of a Potent and Selective Free Fatty Acid Receptor 1 Agonist with Low Lipophilicity and High Oral Bioavailability
作者:Elisabeth Christiansen、Maria E. Due-Hansen、Christian Urban、Manuel Grundmann、Johannes Schmidt、Steffen V. F. Hansen、Brian D. Hudson、Mohamed Zaibi、Stine B. Markussen、Ellen Hagesaether、Graeme Milligan、Michael A. Cawthorne、Evi Kostenis、Matthias U. Kassack、Trond Ulven
DOI:10.1021/jm301470a
日期:2013.2.14
The free fatty acid receptor 1 (FFA1, also known as GPR40) mediates enhancement of glucose-stimulated insulin secretion and is emerging as a new target for the treatment of type 2 diabetes. Several FFA1 agonists are known, but the majority of these suffer from high lipophilicity. We have previously reported the FFA1 agonist 3 (TUG-424). We here describe the continued structure-activity exploration and optimization of this compound series, leading to the discovery of the more potent agonist 40, a compound with low lipophilicity, excellent in vitro metabolic stability and permeability, complete oral bioavailability, and appreciable efficacy on glucose tolerance in mice.