Discovery of potent liver-selective stearoyl-CoA desaturase-1 (SCD1) inhibitors, thiazole-4-acetic acid derivatives, for the treatment of diabetes, hepatic steatosis, and obesity
摘要:
SCD1 is a rate-limiting enzyme in the conversion of saturated fatty acids to monounsaturated fatty acids. SCD1 inhibitors have potential effects on obesity, diabetes, acne, and cancer, but the adverse effects associated with SCD1 inhibition in the skin and eyelids are impediments to clinical development. To avoid mechanism-based adverse effects, we explored the compounds that selectively inhibit SCD1 in the liver in an ex vivo assay. Starting from a systemically active lead compound, we focused on the physicochemical properties tPSA and cLogP to minimize exposure in the off-target tissues. This effort led to the discovery of thiazole-4-acetic acid analog 48 as a potent and liver-selective SCD1 inhibitor. Compound 48 exhibited significant effects in rodent models of diabetes, hepatic steatosis, and obesity, with sufficient safety margins in a rat toxicology study with repeated dosing. (C) 2018 Elsevier Masson SAS. All rights reserved.
Novel diphenylurea derivatives represented by the following formula (I): ##STR1## wherein R.sub.1 is an alkyl group of 5 to 18 carbon atoms, each of R.sub.2 and R.sub.3 is independently an alkyl group of 1 to 5 carbon atoms, an alkoxy group of 1 to 5 carbon atoms or a halogen atom, R.sub.4 is hydrogen atom, an alkyl group of 1 to 5 carbon atoms, an alkoxy group of 1 to 5 carbon atoms or a halogen atom, and X is oxygen atom or sulfur atom, are provided. The compounds are potent in reducing the cholesterol level in serum, and useful for treating hyperlipemia and atherosclerosis.
A Synthetic Route to Chiral Benzo-Fused N-Heterocycles via Sequential Intramolecular Hydroamination and Asymmetric Hydrogenation of Anilino-Alkynes
作者:Cong Xu、Yu Feng、Faju Li、Jiahong Han、Yan-Mei He、Qing-Hua Fan
DOI:10.1021/acs.organomet.9b00183
日期:2019.10.28
derivatives, were obtained from anilino-alkynes in high yields (up to 98%) with moderate to excellent enantioselectivities (up to 98% ee) under mild conditions. This protocol features good functional group tolerance and highatomeconomy. Furthermore, this catalytic protocol is applicable to gram-scale synthesis of a naturally occurring alkaloid, (−)-Angustureine.
已经报道了在单一手性钌配合物或由非手性金配合物和手性钌配合物组成的二元体系的催化下有效的顺序分子内加氢/不对称氢化反应。从苯胺衍生物获得了多种对映体富集的苯并稠合的N-杂环,包括1,2,3,4-四氢喹啉,二氢吲哚和2,3,4,5-四氢-1 H-苯并[ b ] pine庚因衍生物-炔烃在温和条件下具有高产率(高达98%)和中等至优异的对映选择性(高达98%ee)。该协议具有良好的官能团耐受性和较高的原子经济性。此外,该催化方案适用于天然存在的生物碱(-)-Angustureine的克规模合成。
[EN] NITROSATION REAGENTS AND METHODS<br/>[FR] RÉACTIFS ET PROCÉDÉS DE NITROSATION
申请人:UNIV CALIFORNIA
公开号:WO2021257849A1
公开(公告)日:2021-12-23
Provided are compounds that can find use as nitrosation reagents. Provided are nitrosation methods that include reacting a substrate with one of the provided nitrosation reagents and thereby generating a nitrosation product. Provided are kits including a nitrosation reagent. Provided are compositions wherein the nitrosation reagent is enriched in the 15N isotope.
Copolymères à base d'aniline substituée par un groupement alkyle : synthèse d'ortho-alkylanilines
作者:A. Falcou、A. Duchêne、P. Hourquebie
DOI:10.1051/jcp:1998249
日期:1998.6
Les ortho-alkylanilines sont obtenues avec des rendements convenables par une réaction de couplage de type Stille entre des ortho-halogénoanilines et des vinylétains.