Borane-catalyzed cascade Friedel–Crafts alkylation/[1,5]-hydride transfer/Mannich cyclization to afford tetrahydroquinolines
作者:Bei-Bei Zhang、Shuo Peng、Feiyi Wang、Cuifen Lu、Junqi Nie、Zuxing Chen、Guichun Yang、Chao Ma
DOI:10.1039/d1sc05629h
日期:——
An unprecedented redox-neutral annulation reaction of tertiary anilines with electron-deficient alkynes was developed that proceeds through a cascade Friedel–Crafts alkylation/[1,5]-hydride transfer/Mannich cyclization sequence. Under B(C6F5)3 catalysis, a range of functionalized 1,2,3,4-tetrahydroquinolines were facilely constructed in moderate to good yields with exclusive 3,4-anti-stereochemistry
A novel palladium-catalyzed, one-pot, four-step cascademethod has been developed to afford functionalized gamma-lactones in moderate to good yields. This novel and general methodology represents a rare instance of carbonylation of the C(sp(3))-palladium bond.
A novel iodine-catalyzed method for the synthesis of benzothiophene derivatives through cascadereactions of substituted thiophenols with alkynes has been demonstrated under metal- and solvent-freeconditions. The present protocol uses inexpensive and environmentally friendly molecular iodine as the catalyst, and the corresponding products are obtained in moderate to excellent yields. Such an efficient
A novel Pd-catalyzed/Cu-mediated oxidativecyclization has been developed for the synthesis of trisubstituted oxazoles, which is thought to proceed through cascade formation of C-N and C-O bonds. In this protocol, four hydrogen atoms were removed and water was used as the oxygen atom source.
[EN] DIARYL ETHER DERIVATIVES AS NOTCH SPARING GAMMA SECRETASE INHIBITORS<br/>[FR] DÉRIVÉS D'ÉTHER DIARYLIQUE COMME INHIBITEURS DE LA GAMMA-SÉCRÉTASE N'AGISSANT PAS SUR LA VOIE NOTCH
申请人:MERCK SHARP & DOHME
公开号:WO2011046774A1
公开(公告)日:2011-04-21
The invention encompasses a novel class of diaryl ether derivatives which inhibit the processing of APP by the putative ϒ-secretase while sparing Notch signaling pathway, and thus are useful in the treatment or prevention of Alzheimer's disease without the development of Notch inhibition mediated gastrointestinal issues. Pharmaceutical compositions and methods of use are also included.