Facile Synthesis of Oxatricyclic Systems with Various Ring Sizes and Substituents
作者:Sengodagounder Muthusamy、Srinivasarao Arulananda Babu、Chidambaram Gunanathan、Eringathodi Suresh、Parthasarathi Dastidar、Raksh Vir Jasra
DOI:10.1016/s0040-4020(00)00569-x
日期:2000.8
α-diazo carbonyl compounds with rhodium(II) acetate dimer furnish cyclic five- or six-ring carbonyl ylide dipoles, which undergo facile 1,3-dipolar cycloaddition with different dipolarophiles to furnish the substituted and functionalized oxatricyclic systems having various ring sizes. Two X-ray crystallographic analyses of compounds 8b and 15a are reported to firmly establish the stereochemistry of the
使用重氮甲烷溶液或甲磺酰基叠氮化物已经合成了一系列具有不同束缚长度的具有环戊酮,环己酮和取代的环己酮单元的α-重氮羰基化合物。上述具有乙酸铑(II)二聚体的合成的α-重氮羰基化合物提供了环状的五环或六环羰基内酯偶极子,该环偶合了容易的1,3-偶极环加成而具有不同的偶极亲电子,以提供具有各种环的取代的和官能化的氧三环体系大小。据报道,对化合物8b和15a进行了两次X射线晶体学分析,以牢固地确定环加合物的立体化学。