Tandem reactions of α-diazo ketones with macrocyclic olefins: diastereoselective synthesis of oxanorbornane fused macrocyclic lactones
作者:Sengodagounder Muthusamy、Boopathy Gnanaprakasam
DOI:10.1016/j.tet.2007.02.029
日期:2007.4
Tandem cyclization–cycloaddition reactions of α-diazo ketones with macrocyclic olefins in the presence of rhodium(II) acetate catalyst led to the oxanorbornane fused macrocyclic di- or tetralactone ring systems in moderate yield. This forms the first example of 1,3-dipolar cycloaddition reactions with a macrocyclic olefin as a dipolarophile, affording a variety of new oxanorbornane fused macrocycles
在乙酸铑(II)催化剂的存在下,α-重氮酮与大环烯烃的串联环化-环加成反应可中等收率产生氧杂硼烷烷稠合的大环二或四内酯环体系。这形成了以大环烯烃作为双极性亲和剂进行的1,3-偶极环加成反应的第一个实例,从而提供了具有非对映选择性的各种新的氧杂降冰片烷稠合大环。