3,12-di-tert-butyl-4,4,11,11-tetramethyl-tetradeca-1,13-diyne-3,12-diol 在
吡啶 、 copper diacetate 作用下,
生成
(1S,6R)-1,6-Di-tert-butyl-7,7,14,14-tetramethyl-cyclotetradeca-2,4-diyne-1,6-diol 、 (1S,6S)-1,6-Di-tert-butyl-7,7,14,14-tetramethyl-cyclotetradeca-2,4-diyne-1,6-diol