Synthesis of Novel Labdanoid-Based Macroheterocycles Using Click-Cycloaddition Reaction Protocol

A convenient synthetic method to diterpenoid dialkyne 18-propargyloxy-16-[(prop-2-yn-1-yloxi)methyl]labda-8(17),13,15-triene in the common yield of 34 % from the natural plant diterpenoid lambertianic acid was developed. 1,2,3-Triazolyl containing macroheterocyclic compounds with an integrated diterpenoid fragment have been prepared by CuAAC reaction of the labdanoid dialkyne with organic diazides.