(3+3)‐Annulation of Carbonyl Ylides with Donor–Acceptor Cyclopropanes: Synergistic Dirhodium(II) and Lewis Acid Catalysis
作者:Martin Petzold、Peter G. Jones、Daniel B. Werz
DOI:10.1002/anie.201814409
日期:2019.5.6
The first (3+3)‐annulation process of donor–acceptorcyclopropanes using synergistic catalysis is reported. The Rh2(OAc)4‐catalyzed decomposition of diazo carbonyl compounds generated carbonyl ylides in situ. These 1,3‐dipoles were converted with donor–acceptorcyclopropanes, activated by Lewisacid catalysis, to afford multiply substituted pyran scaffolds in high yield and diastereoselectivity. Extensive
Regio‐ and Diastereoselective Dimerization of Diazo Carbonyls: A Cooperative Catalytic Approach to Complex Scaffolds with Four Contiguous Stereocenters
作者:Martin Petzold、Andre Günther、Peter G. Jones、Daniel B. Werz
DOI:10.1002/chem.202001548
日期:2020.9
Starting from readily available o‐diazoacyl‐substituted arene carboxylates, scaffolds with the 5,9‐epoxycyclohepta[b]pyran‐2(3H)‐one core were obtained by cooperative RhII, Lewis and Brønsted acid catalysis. Four new bonds, three functional groups (lactone, ketal, and alcohol) and four contiguous stereocenters are formed during this regio‐ and diastereoselective process in a single synthetic step.
从容易获得的邻重氮酰基取代的芳烃羧酸盐开始,通过 Rh II 、Lewis 和 Brønsted 酸协同催化获得了具有 5,9-环氧环庚[b]吡喃-2(3 H )-one 核的支架。在这个区域和非对映选择性过程中,在单一合成步骤中形成了四个新键、三个官能团(内酯、缩酮和醇)和四个连续的立体中心。深入的优化和机理研究,包括反应中间体的捕获、分离和阐明,得出了合理的机理设想。该反应被认为涉及羰基叶立德,但也涉及酮卡宾平衡的瞬态物质,这些物质经历了环加成和骨架重排的级联。
[EN] DEUTERATED DHODH INHIBITORS<br/>[FR] INHIBITEURS DEUTÉRÉS DE DHODH
申请人:IMMUNIC AG
公开号:WO2022214691A1
公开(公告)日:2022-10-13
The invention relates to novel deuterated compounds of Formula (I) and their use as medicaments.
本发明涉及式(I)的新型氚代化合物及其作为药物的用途。
KALUZ, STEFAN;TOMA, STEFAN, GAZZ. CHIM. ITAL., 117,(1987) N 9, 529-531