Regiospecific Hydration of<i>N</i>-(Diphenylphosphinoyl)propargyl Amines: Synthesis of β-Amino Ketones by Au(III) Catalysis
作者:Jun Ying、Lin Pu
DOI:10.1021/acs.joc.6b01111
日期:2016.9.16
Au(III)-catalyzed regiospecific hydration of N-(diphenylphosphinoyl)propargyl amines has been developed to produce various β-amino ketones. These reactions are conducted in the presence of NaAuCl4·2H2O (10 mol %) in a mixed solvent of EtOH/H2O/CH2Cl2 (4:1:1) at room temperature to give the products in 45–71% yield. The high enantiomeric purity of a chiral N-(diphenylphosphinoyl)propargyl amine (85% ee) is maintained
已经开发出Au(III)催化的N-(二苯基膦酰基)炔丙基胺的区域特异性水合以产生各种β-氨基酮。这些反应在室温下在EtOH / H 2 O / CH 2 Cl 2(4:1:1)的混合溶剂中,在NaAuCl 4 ·2H 2 O(10 mol%)的存在下进行,得到45的产物。 –71%的产率。水合后,手性N-(二苯基膦酰基)炔丙基胺(85%ee)的高对映体纯度得以保持,这使该方法可用于手性β-氨基酮的不对称合成。Zn(BH 4)2还原β-氨基酮产物 得到具有适度非对映选择性的1,3-氨基醇。
Enantioselective addition of terminal alkynes to N-(diphenylphosphinoyl)imines catalyzed by Zn–BINOL complexes
作者:Gonzalo Blay、Eric Ceballos、Alicia Monleón、José R. Pedro
DOI:10.1016/j.tet.2012.01.037
日期:2012.3
Chiral nonracemic N-(diphenylphosphinoyl)-protected propargylic amines have been prepared by addition of terminal alkynes to N-(diphenylphosphinoyl)aldimines in the presence of dimethylzinc and 3,3'-dibromo-BINOL as catalyst. The reaction works with a variety of aromatic and heteroaromatic aldimines and with different alkynes, providing the expected products in generally good yields and enantiomeric excesses (up to 96%). (C) 2012 Elsevier Ltd. All rights reserved.