已经使用差向异构(-)-kaur-16-en-15-ols作为模型研究了garryfoline–cuauchichicine重排的机制。研究表明,在室温下,无机酸中的15β-ol可通过15,16-氢化物移位迅速重排为16 R -(-)-kaur-15-。像veatchine一样,16α-ol在这些条件下也是稳定的。讨论了这些差向异构醇经历15,16-氢化物转变的能力的对比。
Terpenoids. Part V. Rearrangement of ent-kaurane 15β,16β-epoxide to ent-(16R)-atisan-15-one
作者:J. MacMillan、E. R. H. Walker
DOI:10.1039/p19720001274
日期:——
Treatment of ent-kaurane15β,16β-epoxide (5) with boron trifluoride–ether complex in benzene yields ent-(16R)-atisan-15-one (11) and small amounts of the 16S-epimer (4) of ent-kauran-15-one. In the conversion of ent-(16R)-atisan-15-one (11) into ent-atis-15-ene (16), the 15-tosylates (13) and (15) of the epimeric ent-atisan-15-ols (12) and (14) were found to rearrange to the olefin (18) in high yield