Alkylative Lactonization of g,d-Unsaturated Esters with a-Chloro Sulfides. A Concise Synthesis of the Monoterpene Lactone from Chrysanthemum flosculosum L.
Syntheses of two naturally occurring monoterpenes with the santolinyl skeleton
作者:Derek V. Banthorpe、Paul N. Christou
DOI:10.1039/p19810000105
日期:——
isolated fromArtemisiatridentata, has been proved to be 1,4,4-trimethyl-6-vinyl-3-oxabicyclo[3.1.0]hexane by an unambiguous synthesis in six steps from 1-chloro-2-methylpropene, and is thus an irregularmonoterpene of the santolinyl class. The availability of 3,6,6-trimethyl-5,6-dihydro-2H-pyran as an unexpected minor product of one of the steps allowed an efficient eight-step synthesis from the chloro-compound