A concise synthesis of (-)-dihydrospirotryprostatin B via tandem Michael addition
作者:Hengqian Song、Jiacheng Song、Lihong Yan、Weigang He、Pengyan Wang、Yuanzhen Xu、Hongbo Wei、Weiqing Xie
DOI:10.1016/j.tetlet.2021.153486
日期:2021.11
The asymmetric synthesis of (-)-dihydrospirotryprostatin B (3), a cytostatic spiro[pyrrolidine-3,3′-oxindole] alkaloid, has been accomplished in 8 longest linear steps (LLS) from commercially available amino acids. The key step of the synthetic approach consists of the tandem Michael addition of oxindole derived from dipeptide diketopiperazine to alkynone, leading to the rapid construction of the spiro[pyrrolidine-3
(-)-dihydrospirotryprostatin B ( 3 ) 是一种细胞抑制性螺[pyrrolidine-3,3'-oxindole]生物碱的不对称合成,已通过 8 个最长的线性步骤 (LLS) 从市售氨基酸中完成。合成方法的关键步骤包括二肽二酮哌嗪衍生的羟吲哚与炔酮的串联迈克尔加成,从而快速构建具有连续四元螺碳中心和手性的螺[吡咯烷-3,3'-羟吲哚]支架非对映选择性地建立叔胺。