A Cu‐catalyzeddiastereo‐ and enantioselective borylative coupling reaction of 1,3‐dienes with imines was realized. Branched homoallylic amines are readily prepared in a syn‐selective manner with high regio‐, diastereo‐ and enantioselectivity. Moreover, these three‐component coupling reactions feature good functional‐group compatibility and easy access to the substrates and catalyst.
Tandem Processes Identified from Reaction Screening: Nucleophilic Addition to Aryl <i>N</i>-Phosphinylimines Employing La(III)-TFAA Activation
作者:Hidenori Kinoshita、Oscar J. Ingham、Winnie W. Ong、Aaron B. Beeler、John A. Porco
DOI:10.1021/ja100346w
日期:2010.5.12
Reaction screening of nucleophilic reaction partners for addition to N-diphenylphosphinylimines employing lanthanum(III) triflate as a catalyst and trifluoroaceticanhydride (TFAA) as an activator is reported. A number of tandem processes leading to novel chemotypes including aza-Prins/intramolecular Friedel-Crafts annulations have been identified, and both reaction scope and mechanism further investigated
Enantioselective Addition of Dialkylzinc to Aromatic Aldimines Mediated by Camphor-Derived Chiral β-Amino Alcohols
作者:Wei-Ming Huang、Biing-Jiun Uang
DOI:10.1002/asia.201403240
日期:2015.4
The enantioselective addition of diethylzinc or dimethylzinc to N‐(diphenylphosphinoyl)imines mediated by 1 or 2 could be achieved in high yields (70–97 %) and enantioselectivities (85–98 % ee). The catalytic loading of 1 or 2 a could be reduced to 10 mol % for methylation or ethylation of imines in high yields and enantioselectivities (79–96 %) when the reaction was conducted in the presence of 1
A Robust, Efficient, and Highly Enantioselective Method for Synthesis of Homopropargyl Amines
作者:Erika M. Vieira、Fredrik Haeffner、Marc L. Snapper、Amir H. Hoveyda
DOI:10.1002/anie.201202694
日期:2012.7.2
Fast, robust, selective: Copper‐catalyzed enantioselective additions of homopropargyl groups to a wide range of aldimines proceed readily and with high enantioselectivity. The catalytic method is scalable and practical, the allenylboron reagent is commercially available, and conversion into amines is inexpensive and high‐yielding.
Enantio‐ and Diastereoselective Synthesis of Homopropargyl Amines by Copper‐Catalyzed Coupling of Imines, 1,3‐Enynes, and Diborons
作者:Srimanta Manna、Quentin Dherbassy、Gregory J. P. Perry、David J. Procter
DOI:10.1002/anie.201915191
日期:2020.3.16
An efficient, enantio- and diastereoselective, copper-catalyzed coupling of imines, 1,3-enynes, and diborons is reported. The process shows broad substrate scope and delivers complex, chiral homopropargyl amines; useful building blocks on the way to biologically-relevant compounds. In particular, functionalized homopropargyl amines bearing up to three contiguous stereocenters can be prepared in a single