Use of bis-(aminol) ethers derived from N-(S)-(−)-α-methylbenzylamine in reactions with resorcinarenes and double Mannich reactions
作者:Benjamin R. Buckley、Philip C. Bulman Page、Harry Heaney、Edward P. Sampler、Sarah Carley、Constanze Brocke、Margaret A. Brimble
DOI:10.1016/j.tet.2005.03.130
日期:2005.6
synthesis of some chiral bis-(aminol)ethers are described. Reaction of a solution of the resorcin[4]arene derived from propanal with N,N-bis(methoxymethyl)-N-(S)-(−)-α-methylbenzylamine in toluene at 85 °C initially afforded a 1:1 mixture of two diastereoisomeric tetrakis(benzoxazines). Further, heating of this mixture under reflux in ethanol for 24 h afforded the crystalline (αS),(S)-diastereoisomer in
描述了一些手性双(氨基)醚的合成。丙醛衍生的间苯二酚[4]芳烃与N,N-双(甲氧基甲基)-N-(S)-(-)-α-甲基苄基胺的甲苯溶液在85°C下反应,最初得到1:1混合物两个非对映异构体四(苯并恶嗪)。此外,将该混合物在乙醇中回流加热24小时,以77%的产率得到结晶的(αS),(S)-非对映异构体。N,N-双(乙氧基甲基)-N-(S)-(-)-α-甲基苄胺和N,N-双(乙氧基甲基)-N-(使R)-(+)-α-甲基苄基胺与β-酮酯反应,得到非对映异构双曼尼希加合物的1:1混合物。两个双重曼尼希加合物被转化为生物碱甲基lycaconitine 1的三环ABE类似物。