Photoredox-Mediated Mono- and Difluorination of Remote Unactivated Methylene C(sp<sup>3</sup>)–H Bonds of <i>N</i>-Alkyl Sulfonamides
作者:Zhiqiang Deng、Zhenxiang Zhao、Gang He、Gong Chen
DOI:10.1021/acs.orglett.1c01020
日期:2021.5.7
A photoredox-mediated δ-C(sp3)–H fluorination of sulfonyl-protected primary alkylamines with Selectfluor is developed. The reaction can proceed in excellent monofluorination selectivity for amine substrates without α substituent. For α-substituted substrates, a slightly modified reaction conditions with two rounds of operation gives the δ,δ-difluorination products in good yield. Mechanistic studies
Copper-Catalyzed, N-Directed Csp<sup>3</sup>–H Trifluoromethylthiolation (−SCF<sub>3</sub>) and Trifluoromethylselenation (−SeCF<sub>3</sub>)
作者:Atanu Modak、Emily N. Pinter、Silas P. Cook
DOI:10.1021/jacs.9b10316
日期:2019.11.20
A direct and versatile copper-catalyzed trifluoromethylthiolation and trifluoromethylselenation of primary, secondary, and tertiary aliphatic C-H bonds was developed. The reaction provides direct access to molecules containing these emerging moieties in the presence of a wide range of common functional groups and in complex molecular environments.
[EN] LINCOSAMIDE ANTIBIOTICS AND USES THEREOF<br/>[FR] NOUVEAUX ANTIBIOTIQUES DE TYPE LINCOSAMIDES ET UTILISATIONS CORRESPONDANTES
申请人:HARVARD COLLEGE
公开号:WO2019032941A1
公开(公告)日:2019-02-14
Provided are lincosamide compounds for the treatment of infectious diseases. The lincosamides described herein are modified at the amino acid (southern) region. The lincosamides may have further modification at the C-1 and C-7 positions of the aminooctose (northern) region, thus distinguishing them from lincomycin and clindamycin. Also provided are methods for preparing the lincosamide compounds, pharmaceutical compositions comprising the lincosamide compounds, and methods of treating infectious diseases using the disclosed lincosamide compounds.