Cascade Wittig reaction-double Claisen and Cope rearrangements: one-pot synthesis of diprenylated coumarins gravelliferone, balsamiferone, and 6,8-diprenylumbelliferone
作者:Rupesh E. Patre、Jyoti B. Shet、Perunninakulath S. Parameswaran、Santosh G. Tilve
DOI:10.1016/j.tetlet.2009.09.017
日期:2009.11
A cascade Wittig reaction-double Claisen and Cope rearrangements has been employed for a one-pot synthesis of diprenylated coumarins gravelliferone, balsamiferone, and 6,8-diprenylumbelliferone from a common precursor 2,4-diprenyloxybenzaldehyde.
An iterative procedure for the synthesis of the diprenylated coumarins balsamiferone and gravelliferone from umbelliferone via multiple [3.3] sigmatropic rearrangements
作者:Nicholas Cairns、Laurence M. Harwood、David P. Astles
DOI:10.1039/c39870000400
日期:——
Repeated sequences of [3.3] sigmatropicrearrangements initiated by a Claisen rearrangement permit the synthesis of the 3,6-disubstituted umbelliferone derivatives balsamiferone (4) and gravelliferone (6) fromumbelliferone.