Absolute configuration of phomactatriene diterpenoids obtained by Wagner‐Meerwein rearrangement of epimeric verticillols
作者:Ángel A. Río‐Chávez、Hugo A. García‐Gutiérrez、Luisa U. Román‐Marín、Lidia Beiza‐Granados、Carlos M. Cerda‐García‐Rojas、Pedro Joseph‐Nathan、Juan D. Hernández‐Hernández
DOI:10.1002/chir.23061
日期:2019.11
The epimeric diterpenes (+)‐(1S,3E,7E,11S,12S)‐verticilla‐3,7‐dien‐12‐ol (1), isolated from Bursera suntui, and (+)‐(1S,3E,7E,11S,12R)‐verticilla‐3,7‐dien‐12‐ol (2), isolated from Bursera kerberi, gave the same Wagner‐Meerwein rearrangement product (−)‐(1E,4Z,8Z,11S,12R)‐phomacta‐1,(15)4,8‐triene (3). The Et2O:BF3‐induced transformations evidence that verticillenes and phomactanes, both containing
游离二萜(+)‐(1 S,3 E,7 E,11 S,12 S)‐verticilla‐3,7‐dien‐12‐ol(1),分离自Bursera suntui和(+)‐( 1 S,3 E,7 E,11 S,12 R)‐verticilla‐3,7‐dien‐12‐ol(2),从bursera kerberi中分离得到相同的Wagner-Meerwein重排产物(−)‐(1 E,4 Z,8 Z,11 S,12 R)-光气化石1,(15)4,8-三烯(3)。Et 2O:BF 3诱导的转化表明,含有双环[9.3.1]十五烷骨架的Verticillenes和phomactanes通过verticillen-12-yl阳离子(A +)在生物遗传上相关,后者也是生物合成中的关键中间体产生抗肿瘤紫杉烷的途径。使用Monte Carlo协议进行分子建模,然后使用均具有DGDZVP基础集的混合功能B3LYP和