作者:Bubwoong Kang、Yoko Yasuno、Hironori Okamura、Asumi Sakai、Tetsuya Satoh、Masaki Kuse、Tetsuro Shinada
DOI:10.1246/bcsj.20200116
日期:2020.8.15
N-acylation reaction offers an opportunity to develop an efficient synthesis of amide group-containing molecules. We found that N-acyl carbazoles showed remarkable selectivity in transamidation. Sterically less hindered primary amines are selectively acylated with N-acyl carbazoles without any additives. Various functional groups such as alcohol, phenol, indole, and aniline moieties are tolerated under mild conditions. The synthetic utility was displayed in one-pot synthesis of an N-acyl polyamine natural product. The terminal amines of spermidine were selectively benzoylated with N-benzoyl carbazole, followed by acetylation reaction accomplished the total synthesis in a highly efficient manner.
N-酰化反应为开发含酰胺基团分子的有效合成提供了机会。我们发现N-酰基咔唑在转酰胺反应中显示出显著的选择性。空间位阻较小的伯胺能与N-酰基咔唑选择性酰化,无需任何添加剂。在温和条件下,多种官能团如醇、酚、吲哚和苯胺基团均可耐受。合成实用性在一锅法合成N-酰基多胺天然产物中得以展现。精胺的末端氨基通过N-苯甲酰基咔唑选择性苯甲酰化,随后经乙酰化反应实现了高度高效的全程合成。