[EN] DIHYDROPYRIDINONE DERIVATIVES<br/>[FR] DERIVES DE DIHYDROPYRIDINONE
申请人:BAYER HEALTHCARE AG
公开号:WO2005080372A1
公开(公告)日:2005-09-01
The invention relates to novel dihydropyridinone derivatives, processes for their preparation, and their use in medicaments, especially for the treatment of chronic obstructive pulmonary diseases, acute coronary syndrome, acute myocardial infarction and heart failure development.
An efficient Pd-catalyzed asymmetric allylic substitution cascade of 4-hydroxy-2H-pyrones with meso-allyl dicarbonates has been developed for the synthesis of kinetic chiral tetrahydro-1H-pyrano[4,3-b]benzofuran-1-one products in ≤87% yield and ≤99% ee. The protocol was achieved via a temperature-controlled kinetic control process, which has been illustrated by means of the experimental results and
开发了一种高效的 Pd 催化不对称烯丙基取代级联 4-羟基-2 H-吡喃酮与内消旋-烯丙基二碳酸酯合成动力学手性四氢-1 H-吡喃并[4,3 - b ]苯并呋喃-1-酮产品产率≤87%,ee≤99%。该协议是通过温度控制的动力学控制过程实现的,这已通过实验结果和控制实验进行了说明。该反应可以以克级进行,所得产物允许进行多种转化。
Synthesis of 2,3-Dialkyl-5-hydroxybenzofurans via a One-pot, Three-step Reaction Sequence of 2-Monosubstituted 1,3-Diketones and 1,4-Benzoquinones
作者:Qing Dong、Yu-Huan Yang、Xue-Jiao Lv、Jia-Hui Liu、Yan-Kai Liu
DOI:10.1021/acs.joc.4c00511
日期:2024.5.17
An economical one-pot, three-step reaction sequence of readily available 2-monosubstituted 1,3-diketones and 1,4-benzoquinones has been explored for the facile access of 2,3-dialkyl-5-hydroxybenzofurans. By using cheap K2CO3 and conc. HCl as the reaction promoters, the reaction occurs smoothly via sequential Michael addition, aromatization, retro-Claisen, deacylation, hemiketalization, and dehydration
为了方便地获得 2,3-二烷基-5-羟基苯并呋喃,我们探索了一种经济的一锅三步反应序列,由容易获得的 2-单取代 1,3-二酮和 1,4-苯醌组成。通过使用廉价的 K 2 CO 3和浓缩物。以HCl为反应促进剂,通过连续的迈克尔加成、芳构化、逆克莱森、脱酰化、半缩酮化和脱水等过程,反应在温和条件下顺利进行,实用性强。此外,在衍生化研究过程中观察到一个有趣的现象,其中二氢喹啉通过歧化过程分别转化为四氢喹啉和喹啉产物。
DIHYDROPYRIDINONE DERIVATIVES
申请人:Bayer HealthCare AG
公开号:EP1720857A1
公开(公告)日:2006-11-15
SUBSTITUIERTE 4-ARYL-1,4-DIHYDRO-1,6-NAPHTHYRIDINE UND IHRE VERWENDUNG