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.