Synthesis of Functionalized Oxazolones by a Sequence of Cu(II)- and Au(I)-Catalyzed Transformations
作者:Florin M. Istrate、Andrea K. Buzas、Igor Dias Jurberg、Yann Odabachian、Fabien Gagosz
DOI:10.1021/ol703077g
日期:2008.3.1
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.
An Efficient Silver Tetrafluoroborate-Catalyzed Cycloisomerization of Ynamides
作者:Winai Ieawsuwan、Somsak Ruchirawat
DOI:10.3987/com-18-s(f)21
日期:——
Zinc Chloride Mediated Synthesis of
<i>3H</i>
‐Oxazol‐2‐one and Pyrrolo‐oxazin‐1‐one from Ynamide
A simple zincchloridemediated cyclization of ynamidyl N‐carbamates or 2‐ynamidyl‐(hetero)arylcarboxylates is achieved under mild reaction conditions, leading to the synthesis of useful heterocyclic scaffolds, 3H‐oxazol‐2‐ones and pyrrolo‐oxazin‐1‐ones, with good yields.