Biomimetic rearrangements of simplified labdane diterpenoids
作者:Jonathan H. George、Mark McArdle、Jack E. Baldwin、Robert M. Adlington
DOI:10.1016/j.tet.2010.05.052
日期:2010.8
Simplified ethyl-substituted labdanediterpenoids 14 and 19 have been synthesised from (+)-sclareolide (18). Biomimetic rearrangements of these compounds, involving stereospecific 1,2-alkyl and hydride shifts, have been carried out by treatment with a variety of Lewis and protic acids. Halimane compounds, such as 34 and simple dehydration products such as 3, 32 and 33 have been formed either selectively