Rhodium(II) catalyzed highly diastereoselective synthesis of conformationally restricted dispiro[1,3-dioxolane]bisoxindoles
作者:Sengodagounder Muthusamy、Rajagopal Ramkumar
DOI:10.1016/j.tet.2014.06.085
日期:2014.9
Synthesis of conformationally restricted dispiro- and bis-dispiro-1,3-dioxolanes via three-component reaction of diazoamides, ketoamides/diketones, and aromatic/heteroaromatic aldehydes in the presence of rhodium(II) acetate dimer catalyst at room temperature involving carbonyl ylides is demonstrated with diastereoselectivity. Synthesis of macrocyclic dispiro-1,3-dioxolanes via intramolecular carbonyl
在乙酸铑(II)二聚体催化剂存在下,在室温下,在羰基羰基化物的存在下,通过重氮酰胺,酮酰胺/二酮和芳族/杂芳族醛的三组分反应,合成构象受限的双螺和双二螺-1,3-二氧戊环用非对映选择性证明。还描述了通过分子内羰基内酯合成大环二螺-1,3-二氧戊环的高产率。在温和条件下以高度非对映和区域选择性的方式获得了构象受限的对称和不对称的dispiro-1,3-dioxolanes。