Enantioselective Synthesis of Cyclopropanone Equivalents and Application to the Formation of Chiral β‐Lactams
作者:Christopher M. Poteat、Yujin Jang、Myunggi Jung、J. Drake Johnson、Rachel G. Williams、Vincent N. G. Lindsay
DOI:10.1002/anie.202006786
日期:2020.10.12
derivatives have long been considered unsustainable synthetic intermediates because of their extreme strain and kinetic instability. Reported here is the enantioselective synthesis of 1‐sulfonylcyclopropanols, as stable yet powerful equivalents of the corresponding cyclopropanone derivatives, by α‐hydroxylation of sulfonylcyclopropanes using a bis(silyl) peroxide as the electrophilic oxygen source. This
[EN] NOVEL SUBSTITUTED TETRAHYDROQUINOLIN COMPOUNDS AS INDOLEAMINE 2,3-DIOXYGENASE (IDO) INHIBITORS<br/>[FR] NOUVEAUX COMPOSÉS DE TÉTRAHYDROQUINOLINE SUBSTITUÉS UTILISÉS EN TANT QU'INHIBITEURS DE L'INDOLÉAMINE 2,3-DIOXYGÉNASE (IDO)
申请人:MERCK SHARP & DOHME
公开号:WO2019089412A1
公开(公告)日:2019-05-09
Disclosed herein is a compound of formula (I), or a pharmaceutically acceptable salt thereof (I). Also disclosed herein are uses of the compounds disclosed herein in the potential treatment or prevention of an IDO-associated disease or disorder. Also disclosed herein are compositions comprising a compound disclosed herein. Further disclosed herein are uses of the compositions in the potential treatment or prevention of an IDO-associated disease or disorder.
Formation of 2,3-dihydro-4(1H)-quinolones and related compounds via Fries-type acid-catalysed rearrangement of 1-arylazetidin-2-ones
作者:Shinto Kano、Tsutomu Ebata、Shiroshi Shibuya
DOI:10.1039/p19800002105
日期:——
corresponding 2,3-dihydro-4(1H)-quinolones via acyl migration and N–CO fission. In the case of 1-(3-substituted phenyl)azetidin-2-ones, two positional isomeric products, 5- and 7-substituted 2,3-dihydro-4(1H)-quinolones were obtained. 4-Methyl-, 4-ethoxycarbonyl-, and 4-piperidin-2yl-1-arylazetidin-2-ones and their analogues were also converted into the corresponding 2-substituted 2,3dihydro-4(1H)-quinolones
Synthesis of 2,3-Dihydro-4(1H)-quinolones and the Corresponding 4(1H)-Quinolones via Low-Temperature Fries Rearrangement of N-Arylazetidin-2-ones
作者:Jens Lange、Alex C. Bissember、Martin G. Banwell、Ian A. Cade
DOI:10.1071/ch10465
日期:——
cyclization processes, undergo smooth Fries-rearrangement in triflic acid at 0–18°C to give the isomeric 2,3-dihydro-4(1H)-quinolones (2). Dehydrogenation of the latter compounds using 10% Pd on C in 1.0 M aqueous sodium hydroxide/propan-2-ol mixtures at ca. 82°C provides the corresponding 4(1H)-quinolones (3).