Synthesis of novel carbo- and hetero-polycycles. Part 8. An efficient and convenient synthesis of adamantylidenevinylidenecyclopropane derivatives
Abstract
Crown ether catalysed dehydrochlorination of 2-chloro-2-ethynyladamantane (3) with ButOK provided a convenient and efficient method for the synthesis of adamantylidenevinylidene (4). In the presence of olefins (5a–o), compound (4) afforded the corresponding adamantylidenevinylidenecyclopropane derivatives (6a–o) in 30–81% yields.