Studies in the Total Synthesis of Mono- and Sesquiterpenes. Antirride

Abstract
Pursuant to our investigations into the use of bicyclo[3.3.0]-octane derivatives in synthesizing cyclopentanoid monoterpenes,1 we were prompted to develop an efficient route to a synthetic equivalent of 1, an attractive entry to such natural products as morroniside,2 loganin,3 plumericin,4 and sarracenin.5 The target chosen was compound 2, an established derivative of the natural product antirride,6 characterized in 1969, but unknown synthetically. We now wish to report the synthesis of 2, as a prelude to the synthetic studies of plumericin4 and sarracenin5.