Oxidative Inter-/Intermolecular Alkene Diamination of Hydroxy Styrenes with Electron-Rich Amines
作者:Michael W. Danneman、Ki Bum Hong、Jeffrey N. Johnston
DOI:10.1021/acs.orglett.5b01177
日期:2015.5.15
Doubly intermolecularalkenediamination is achieved with electron-rich, terminal alkenes through the use of a hypervalent iodine (PhI(OAc)2) reagent, iodide, and electron-rich amines. Mono- and disubstituted amines combine with electron-rich alkenes, particularly o-hydroxystyrenes, to achieve the greatest level of generality. This operationally straightforward protocol, unreliant on conventional metal-based
[EN] The present invention provides a compound represented by the formula (I): wherein each symbol is as defined in the description, or a salt thereof. The compound or a salt thereof or a prodrug thereof has a GPR40 receptor function modulating action and is useful as an insulin secretagogue or an agent for the prophylaxis or treatment of diabetes and the like. [FR] L'invention concerne un composé représenté par la formule (I), la signification de chaque symbole étant définie dans la description, ou un sel de ce composé. Ce composé, ou un sel ou un précurseur de celui-ci, possède une activité de modulation de la fonction du récepteur GPR40 et peut être utilisé comme insulino-sécrétagogue ou comme agent de prévention ou de traitement du diabète et de troubles analogues.
Practical access to <i>(S)-</i>heterocyclic aromatic acetates <i>via CAL-B</i>/Na<sub>2</sub>CO<sub>3</sub>-deacylation and Mitsunobu reaction protocol
media. The (R)-furnished alcohols and the (S)-remained acetates are recovered enantiopures (ee >99%, E ≫ 200, Conv = 50%). Those ideal enzymatic kinetic resolution (EKRs) are well incorporated to the Mitsunobu inversion protocol in a onepot procedure to give (S)-heterocyclic acetates (1a–3a) in good to high enantiomeric excess (88%–92% ee). Whilst, the (S)-heteroaromatic acetates (5a and 6a) are given