Sj. Amigoni et al., ENANTIOSELECTIVE TOTAL SYNTHESIS OF THE (-)-(6R,11R,14S)-ISOMER OF COLLETALLOL, Journal of organic chemistry, 62(18), 1997, pp. 6374-6378
The total synthesis of the (-)-(6R,11R,14S)-isomer of colletallol was
achieved in 15 steps. The key steps of the sequence were the building
of the macrocycle via two consecutive Wittig reactions, the first inte
rmolecular and the second intramolecular, instead of the classical mac
rolactonization methods.