作者:Panawan Moosophon、Morwenna C. Baird、Somdej Kanokmedhakul、Stephen G. Pyne
DOI:10.1002/ejoc.201000157
日期:2010.6
The totalsynthesis of calystegine B 4 was achieved in 10 steps from (―)-D-lyxose by using a new synthetic strategy to obtain the requisite protected hydroxylacted 4-aminocyclohept-2-en-1-one without the problem of regioisomer formation that was a problem in the earlier synthesis of this natural product. The key steps included a Petasis―borono-Mannich reaction and a ring-closing metathesis reaction
Calystegine B 4 的全合成是从 (-)-D-lyxose 中分 10 步完成的,通过使用一种新的合成策略来获得必要的受保护的羟基化 4-aminocyclohept-2-en-1-one,而不会形成区域异构体在这种天然产物的早期合成中是一个问题。关键步骤包括Petasis-borono-Mannich反应和闭环复分解反应。