Titanocene(III) Chloride Mediated Radical Induced Allylation of Aldimines: Formal Synthesis of C-Linked 4′-Deoxy Aza-disaccharide
作者:Sumit Saha、Subhas Chandra Roy
DOI:10.1021/jo200908b
日期:2011.9.2
Titanocene(III) chloride (Cp2TiCl) mediated radical induced allylation of aldimines for the preparation of homoallyl amines is described. The radical was generated from the allyl bromide using Cp2TiCl as the radical source. Formal synthesis of C(4)–C(5′)-linked 4′-deoxy aza-disaccharide is demonstrated and a study toward the bicyclic skeleton of alkaloids was also accomplished. The radical initiator
描述了氯化钛新茂(III)(Cp 2 TiCl)介导的自由基诱导的亚胺的烯丙基化,用于制备高烯丙基胺。使用Cp 2 TiCl作为自由基源,从烯丙基溴生成自由基。C(4)–C(5')-连接的4'-脱氧氮杂-二糖的形式合成得到证明,并完成了对生物碱双环骨架的研究。自由基引发剂Cp 2 TiCl是在氩气中由市售的二茂钛二氯化物(Cp 2 TiCl 2)和Zn粉在THF中原位制备的。