科研之友
微信
新浪微博
Facebook
分享链接
摘要
A catalyst-free, environmentally benign three-component vinylogous MukaiyamaMannich reaction of pyrrole-based silyl dienolates is presented, which works effectively in both aqueous and solvent-free environments. Both lipophilic and hydrophilic aldehyde candidates are suitable substrates, allowing access to a rich repertoire of unsaturated vicinal aminolactam structures with virtually complete ?-site selectivity and moderate to good anti-diastereoselectivity. The utility of this technology is highlighted by protecting group-free synthesis of densely hydroxylated, sugar-related lactam frameworks. The role of water as an indispensable H-bonding reaction propeller is demonstrated.
- 出版日期2011-12
