Synthesis of Functionalized Oxazolones by a Sequence of Cu(II)- and Au(I)-Catalyzed Transformations
摘要:
A study concerning a two-step sequence leading to the formation of diversely 1,5-disubstituted oxazolones is described. The mild conditions employed allow the efficient and rapid synthesis of a variety of such compounds via an initial Cu(II)-catalyzed coupling of a bromoalkyne with a secondary tert-butyloxycarbamate followed by a Au(I)-catalyzed cycloisomerization of the N-alkynyl tert-butyloxycarbamates thus obtained.
Synthesis of Functionalized Oxazolones by a Sequence of Cu(II)- and Au(I)-Catalyzed Transformations
摘要:
A study concerning a two-step sequence leading to the formation of diversely 1,5-disubstituted oxazolones is described. The mild conditions employed allow the efficient and rapid synthesis of a variety of such compounds via an initial Cu(II)-catalyzed coupling of a bromoalkyne with a secondary tert-butyloxycarbamate followed by a Au(I)-catalyzed cycloisomerization of the N-alkynyl tert-butyloxycarbamates thus obtained.
Cu(I)‐Catalyzed Oxytrifluoromethylation of
<i>N</i>
‐Boc‐Ynamides for the Construction of Trifluoromethylated Oxazolones
作者:Yue Zuo、Xingyuan Ye、Dongjie Jiang、Shuai Zhou、Mengyuan Yu、Guangke He
DOI:10.1002/adsc.202200971
日期:2022.12.8
A chemo-selective copper(I)-catalyzed oxytrifluoromethylation of N-Boc-ynamides with TMSCF3 has been achieved, affording the trifluoromethylatedoxazolones in 51–99% yields. The reaction proceeds at room temperature and tolerates a variety of functional groups such as −X, −OMe, alkenyl, and other substituents. The resulting oxazolones provide access to α-CF3-substituted amines through decarboxylative