Photoredox-Catalyzed Deaminative Alkylation via C–N Bond Activation of Primary Amines
作者:Melissa A. Ashley、Tomislav Rovis
DOI:10.1021/jacs.0c08595
日期:2020.10.28
starting materials. For these reasons, deaminative functionalization of amines has emerged as an important area of research. Recent advances in C-N activation transform simple α-1° and α-2° amines into alkylating reagents via Katritzky pyridinium salts. We report a complementary method that activates sterically encumbered α-3° primary amines through visiblelight photoredox catalysis. By condensing α-3°
[EN] PROCESS FOR THE PREPARATION OF BETA-SANTALOL AND DERIVATIVES THEREOF<br/>[FR] PROCÉDÉ D'ÉLABORATION DE BÊTA-SANTALOL ET DÉRIVÉS CORRESPONDANTS
申请人:FIRMENICH & CIE
公开号:WO2009141781A1
公开(公告)日:2009-11-26
The present invention concerns a process for the preparation of a compound of formula (I) wherein R represents a Me or Et group, as well as said compound in the form of any one of its stereoisomers or mixture thereof. The invention concerns also the use of compound (I) for the synthesis of β-santalol or of derivatives thereof.
A Practical Synthesis of 3-Acyl Cyclobutanones by [2 + 2] Annulation. Mechanism and Utility of the Zn(II)-Catalyzed Condensation of α-Chloroenamines with Electron-Deficient Alkenes
作者:Jeannette M. O’Brien、Jason S. Kingsbury
DOI:10.1021/jo102257k
日期:2011.3.18
New conditions for the conversion of simple tertiary amides to α-chloroenamines and their use in Zn(II)-catalyzed cycloadditionreactions with commercial α,β-unsaturatedcarbonylcompounds allows rapid, regiocontrolled access to 3-acyl cyclobutanones. Reactions take place at ambient temperature without solvent, giving strained [2 + 2] adducts with all-carbon-substituted quaternary carbon atoms. Ab
TheClemmensen Reduction of ?, ?-Unsaturated Ketones
作者:Charles W. Jefford、Andr� F. Boschung
DOI:10.1002/hlca.19760590328
日期:1976.4.21
Eleven structurally different α, β-unsaturated ketones were subjected to the Clemmensenreduction under anhydrous conditions using amalgamated zinc, hydrogen chloride in a solution of ethyl ether, and acetic anhydride. In all cases but one the formation of cyclopropyl acetates was observed. 4-Methyl-3-penten-2-one, methyl vinyl ketone, 2-isopropylidene-1-cyclopentanone, and 2-cyclohepten-1-one led
Stereocontrol in a Combined Allylic Azide Rearrangement and Intramolecular Schmidt Reaction
作者:Ruzhang Liu、Osvaldo Gutierrez、Dean J. Tantillo、Jeffrey Aubé
DOI:10.1021/ja300369c
日期:2012.4.18
Pre-equilibration of an interconverting set of isomeric allylicazides is coupled with an intramolecular Schmidt reaction to afford substituted lactams stereoselectively. The effect of substitution and a preliminary mechanistic study are reported. The synthetic potential of this method is demonstrated in the context of an enantioselective synthesis of an advanced intermediate leading toward pinnaic