A New Route to<i>N</i>-Aryl 2-Alkenamides,<i>N</i>-Allyl<i>N</i>-Aryl 2-Alkenamides, and<i>N</i>-Aryl α,β-Unsaturated γ-Lactams from<i>N</i>-Aryl 3-(Phenylsulfonyl)propanamides
作者:Eng-Chi Wang、Keng-Shiang Huang、Gwo-Woei Lin、Jia-Ruei Lin、Ming-Kun Hsu
DOI:10.1002/jccs.200100016
日期:2001.2
A series of N-aryl 2-alkenamides were produced efficiently by treating N-aryl 3-(phenylsulfonyl)-propanamides with potassium tert-butoxide in THF at 0°C. With out isolation, it was further treated with an additional equivalent of potassium tert-butoxide and allyl bromide to give N-allyl N-aryl 2-alkenamides in one pot in good yields. Followed by a ring-closing metathesis reaction, these N-allyl N-aryl
通过在 THF 中在 0°C 下用叔丁醇钾处理 N-芳基 3-(苯磺酰基)-丙酰胺,有效地制备了一系列 N-芳基 2-链烯酰胺。在没有分离的情况下,它进一步用额外当量的叔丁醇钾和烯丙基溴处理,在一锅中以良好的收率得到 N-烯丙基 N-芳基 2-链烯酰胺。随后进行闭环复分解反应,这些 N-烯丙基 N-芳基 2-烯酰胺分别以中等收率转化为相应的 N-芳基 α,β-不饱和 γ-内酰胺。