Synthetic Transformations of Higher Terpenoids. XXXIV.* Preparation of Carboxyl Derivatives of Isopimaric Acid
作者:M. A. Timoshenko、A. B. Ayusheev、Yu. V. Kharitonov、M. M. Shakirov、E. E. Shul’ts
DOI:10.1007/s10600-014-1050-5
日期:2014.10
New isopimaric acid derivatives containing amines and methyl esters of α-, β-, and ω-amino acids were prepared. Conditions were found for cyclic isomerisation of isopimaric acid propargylamide into 2-(dodecahydrophenanthren-1-yl)-5-methyloxazole or 2-(dodecahydrophenanthren-1-yl)-5-methylene-4,5-dihydrooxazole. The latter was selectively modified by adding the methyl ester of (2-methylamino)butanoic
制备了含有胺和α-、β-和ω-氨基酸甲酯的新异海松酸衍生物。发现异海松酸炔丙酰胺循环异构化成2-(十二氢菲-1-基)-5-甲基恶唑或2-(十二氢菲-1-基)-5-亚甲基-4,5-二氢恶唑的条件。后者通过在恶唑 C-5 位添加(2-甲基氨基)丁酸甲酯进行选择性修饰。