(8R,9S)-8-((Z)-5-Hydroxy-3-methyl-pent-3-en-1-ynyl)-7,9-dimethyl-9-(tetrahydro-pyran-2-yloxymethyl)-1,4-dioxa-spiro[4.5]dec-6-en-8-ol 在
红铝 作用下,
以
四氢呋喃 为溶剂,
生成 (8S,9S)-8-((1E,3Z)-5-Hydroxy-3-methyl-penta-1,3-dienyl)-7,9-dimethyl-9-(tetrahydro-pyran-2-yloxymethyl)-1,4-dioxa-spiro[4.5]dec-6-en-8-ol