Synthesis of Hexahydrocyclopenta[c]furans by an Intramolecular Iron-Catalyzed Ring Expansion Reaction
作者:Gerhard Hilt、Patrick Bolze、Maja Heitbaum、Katrin Hasse、Klaus Harms、Werner Massa
DOI:10.1002/adsc.200700035
日期:2007.8.6
The intramolecular iron-catalyzed ring expansionreaction of epoxyalkenes was investigated with a preformed iron(salen) [Fe(Salen)] complex. The formal insertion of the alkene into the epoxide generated hexahydrocyclopenta[c]furan derivatives in moderate to good yields and diastereoselectivities depending on other functional groups present in the starting materials. In addition, oxygen-tethered epoxyalkenes
用预先形成的铁(salen)[Fe(Salen)]配合物研究了环氧烯烃的分子内铁催化的环膨胀反应。取决于起始原料中存在的其他官能团,烯烃以中等至良好的产率和非对映选择性正式插入环氧化物生成的六氢环戊[ c ]呋喃衍生物中。另外,将氧束缚的环氧烯烃用于木脂素异构体的合成。讨论了Fe(Salen)催化反应过程的范围和局限性。
Stereoselective Synthesis of δ-Lactones from 5-Oxoalkanals via One-Pot Sequential Acetalization, Tishchenko Reaction, and Lactonization by Cooperative Catalysis of Samarium Ion and Mercaptan
作者:Jue-Liang Hsu、Jim-Min Fang
DOI:10.1021/jo016058t
日期:2001.12.1
sequence of acetalization, Tishchenko reaction and lactonization. The deliberative use of mercaptan, by comparison with alcohol, is advantageous to facilitate the catalytic cycle. The reaction mechanism and stereochemistry are proposed and supported by some experimental evidence. Such samarium ion/mercaptan cocatalyzed reactions show the feature of remote control, which is applicable to the asymmetric synthesis
[EN] COMPOUNDS, COMPOSITIONS, AND METHODS FOR USE IN TREATING AUTOPHAGY-ASSOCIATED DISORDERS<br/>[FR] COMPOSÉS, COMPOSITIONS ET PROCÉDÉS DESTINÉS À ÊTRE UTILISÉS DANS LE TRAITEMENT DE TROUBLES ASSOCIÉS À L'AUTOPHAGIE
申请人:BIOPHAGY INC
公开号:WO2020131924A1
公开(公告)日:2020-06-25
The invention provides compounds and methods of treating autophagy mediated diseases and disorders and related pharmaceutical compositions, diagnostics, screening techniques and kits.