1-TOSLOXY-2,2-ETHYLENEDIOXY-6,10-DIMETHYL UNDECANES AND UNDECENES, PROCESS FOR THE PREPARATION OF 2S*,3R*-3-BENZYLOXY-6,6-ETHYLENE DIOXY-2-METHYL-2-(5'-HYDROXY-4'-METHYLPENTYL)-OXEPANE, AND USE OF THE LATTER FOR THE PREPARATION OF OXEPAN-3-OL DERIVATIVES

摘要

Acetals and thioacetals are intermediates in a process for the preparation of a trioxaspiroundecane derivative of the formula III outlined in the following diagram …… wherein R is -(CH2)3CH(CH3)CH2OSi(C6H5)2t-C4H9, -(CH2)3CH(CH3)CH2OCH2OCH2CH2OCH3 and -(CH2)3CH(CH3)=CH2. …This compound is an intermediate in the synthesis of a compound of the formula …… one of the most active components of the zoapatle plant. The natural product is useful as an utero-evacuant agent.