Construction of Cyclohepta[b]indoles via Platinum-Catalyzed Intermolecular Formal [4+3]-Cycloaddition Reaction of α,β-Unsaturated Carbene Complex Intermediates with Siloxydienes
作者:Nobuharu Iwasawa、Hiroyuki Kusama、Hideyuki Sogo、Kodai Saito、Takuya Suga
DOI:10.1055/s-0033-1338938
日期:——
Platinum(II)-catalyzed intermolecular formal [4+3]-cycloaddition reaction of α,β-unsaturated carbene complex intermediates with siloxydienes proceeded under mild conditions to give cyclohepta[b]indole derivatives in good yield. The reaction was found to proceed via 1,2-alkyl shift of the carbene complex intermediates obtained by [4+2]-cycloaddition reaction of the unsaturated carbenes with dienes.
铂 (II) 催化的 α,β-不饱和卡宾配合物中间体与甲硅烷氧基二烯的分子间形式 [4+3]-环加成反应在温和条件下进行,以良好的收率得到环庚 [b] 吲哚衍生物。发现该反应通过不饱和卡宾与二烯的 [4+2]-环加成反应获得的卡宾配合物中间体的 1,2-烷基转移进行。