A novel enantioselective synthesis of carbamoyl isoquinoline and tetrahydropyridine derivatives is accomplished using matched combinations of Lewis or Bronsted acids and secondary amine organocatalysts.
Dual metal and Lewis base catalysis approach for asymmetric synthesis of dihydroquinolines and the α-arylation of aldehydes <i>via N</i>-acyliminium ions
作者:Chandra M. R. Volla、Eleonora Fava、Iuliana Atodiresei、Magnus Rueping
DOI:10.1039/c5cc05209b
日期:——
A dual catalytic system consisting of indium triflate and a chiral imidazolidinone catalyzes the asymmetric addition of aldehydes to N-acyl quinoliniums furnishing optically active dihydroquinolines in good yields and excellent selectivities.
Enantioselective, Nickel-Catalyzed Suzuki Cross-Coupling of Quinolinium Ions
作者:Jason D. Shields、Derek T. Ahneman、Thomas J. A. Graham、Abigail G. Doyle
DOI:10.1021/ol4031364
日期:2014.1.3
Quinolinium ions are engaged in an asymmetric, Ni-catalyzed Suzuki cross-coupling to yield 2-aryl- and 2-heteroaryl-1,2-dihydroquinolines. Key to the development of this method is the use of a Ni(II) precatalyst that activates without the need for strong reductants or high temperatures. The Ni-iminium activation mode is demonstrated as an exceptionally mild pathway to generate enantioenriched products from racemic starting materials.
Enantioselective Boronate Additions to <i>N</i>-Acyl Quinoliniums Catalyzed by Tartaric Acid
作者:Tomohiro Kodama、Philip N. Moquist、Scott E. Schaus
DOI:10.1021/ol2028702
日期:2011.12.2
Tartaric acid catalyzes the asymmetric addition of vinylboronates to N-acyl quinoliniums, affording highly enantioenriched dihydroquinolines. The catalyst serves to activate the boronate through a ligand-exchange reaction and generates the N-acyl quinolinium in situ from the stable quinoline-derived N,O-acetal.
CAMPTOTHECIN PEPTIDE CONJUGATES
申请人:SEATTLE GENETICS, INC.
公开号:US20190343828A1
公开(公告)日:2019-11-14
Provided herein are Camptothecin Conjugates, Camptothecin-Linker Compounds, Camptothecin Compounds, intermediates thereof, and method of preparing the same. Also provided herein are methods of treating cancer and autoimmune diseases with the Conjugates described herein.