Fluoride-Promoted Cross-Coupling of Chloro(mono-, di-, or triphenyl)germanes with Aryl Halides in “Moist” Toluene. Multiple Transfer of the Phenyl Group from Organogermane Substrates and Comparison of the Coupling Efficiencies of Chloro(phenyl)germanes with their Corresponding Stannane and Silane Counterparts
作者:Jean-Philippe Pitteloud、Zun-Ting Zhang、Yong Liang、Laura Cabrera、Stanislaw F. Wnuk
DOI:10.1021/jo101848f
日期:2010.12.3
efficient activation by fluoride to promote transfer of one, two, or three phenyl groups from the organogermanes. The corresponding chlorophenylstannanes were found to be more reactive than chlorophenylsilanes, which in turn were more effective than chlorophenylgermanes. One chloride ligand on the Ge or Si center allows efficient activation by fluoride to promote transfer of up to three aryl groups
三氯苯基-、二氯二苯基-和氯三苯基锗烷在四丁基氟化铵的甲苯中加入测量的水量。Ge 中心的一个氯化物配体允许氟化物有效活化,以促进一个、两个或三个苯基基团从有机锗烷转移。发现相应的氯苯基锡烷比氯苯基硅烷更具反应性,而氯苯基硅烷又比氯苯基锗烷更有效。Ge 或 Si 中心的一个氯化物配体允许氟化物有效活化,以促进多达三个芳基从锗烷或硅的转移。然而,Sn 中心不需要卤配体,因为在氟化物促进的与芳基卤化物的偶联过程中,四苯基锡有效地转移了多达四个苯基。19 F NMR 研究表明,氟苯基锗烷和高价锗酸盐物质的形成可能是中间体。
[EN] MODULATORS OF CYSTIC FIBROSIS TRANSMEMBRANE CONDUCTANCE REGULATOR<br/>[FR] MODULATEURS DU RÉGULATEUR DE LA CONDUCTANCE TRANSMEMBRANAIRE DE LA FIBROSE KYSTIQUE
申请人:ABELA ALEXANDER RUSSELL
公开号:WO2019195739A1
公开(公告)日:2019-10-10
This disclosure provides modulators of Cystic Fibrosis Transmembrane Conductance Regulator (CFTR), pharmaceutical compositions containing at least one such modulator, methods of treatment of cystic fibrosis using such modulators and pharmaceutical compositions, and processes for making such modulators.
Amino acid-promoted C–H alkylation with alkylboronic acids using a removable directing group
作者:Yu Zhang、Hang Jiang、Dushen Chen、Yanghui Zhang
DOI:10.1039/c6ob00674d
日期:——
Palladium-catalyzed C–H alkylation reaction with alkylboronic acids has successfully been developed using a removable pyridyldiisopropylsilyl directing group. The amino acid played a crucial role as a ligand in the reaction. The alkylation protocol is also applicable to the coupling of C(sp3)–H bonds with alkylboronic acids.
Ru-Catalyzed Geminal Hydroboration of Silyl Alkynes via a New <i>gem</i>-Addition Mechanism
作者:Qiang Feng、Haonan Wu、Xin Li、Lijuan Song、Lung Wa Chung、Yun-Dong Wu、Jianwei Sun
DOI:10.1021/jacs.0c05334
日期:2020.8.12
mode of alkynehydroboration, herein we describe a new 1,1-hydroboration mode. It is the first demonstration of gem-(H,B) addition to an alkyne triple bond. With the superior [CpRu(MeCN)3]PF6 catalyst, a range of silyl alkynes reacted efficiently with HBpin under mild conditions to form various synthetically useful silyl vinyl boronates with complete stereoselectivity and broad functional group compatibility
An UV study of polymetallic chains of Group IVB elements (Ge, Si) was developed. The studied polygermanes and polygermasilanes were mainly synthetized either by reaction of organolithium with organochlorogermanes or by a Würtz type reaction.