Synthesis of Acetylenic Amides with Propyllactam Moieties by In Situ DBU or DBN Ring-Opening Rearrangement in the Presence of Acetylenic Esters
作者:Boris Trofimov、Olesya Shemyakina、Olga Volostnykh、Anton Stepanov、Anastasiya Mal’kina、Igor Ushakov
DOI:10.1055/s-0036-1591852
日期:2018.2
8-diazabicyclo[5.4.0]undec-7-ene) react with methyl esters of acetylenic acids and excess water (the reactant molar ratio 1:1, in aqueous MeCN, at 20–25 °C, for 48 h) to afford acetylenic amides with pyrrolidone and caprolactam moieties in 89–100% yields. The synthesis involves amines formed in situ from the cyclic amidines, which further react with acetylenic esters. DBN (1,5-diazabicyclo[4.3.0]non-5-ene) and
摘要 DBN(1,5-二氮杂双环[4.3.0] non-5-ene)和DBU(1,8-二氮杂双环[5.4.0]十一烷基-7-ene)与炔酸的甲酯和过量的水(反应物)反应摩尔比1:1,在MeCN水溶液中,在20–25°C下放置48小时),以89-100%的收率得到带有吡咯烷酮和己内酰胺部分的炔属酰胺。该合成涉及由环状am原位形成的胺,其进一步与炔属酯反应。 DBN(1,5-二氮杂双环[4.3.0] non-5-ene)和DBU(1,8-二氮杂双环[5.4.0]十一烷基-7-ene)与炔酸的甲酯和过量的水(反应物)反应摩尔比1:1,在MeCN水溶液中,在20–25°C下放置48小时),以89-100%的收率得到带有吡咯烷酮和己内酰胺部分的炔属酰胺。该合成涉及由环状am原位形成的胺,其进一步与炔属酯反应。