2-(4-Hydroxy-4-methyl-pent-2-ynyl)-2-(3-triethylsilanyl-prop-2-ynyl)-malonic acid dimethyl ester 在
cyclopentadienylruthenium(II) trisacetonitrile hexafluorophosphate 、
水 作用下,
以
丙酮 为溶剂,
反应 2.0h,
以85%的产率得到3,3-Dimethyl-1-triethylsilanyl-3,4-dihydro-7H-cyclopenta[c]pyran-6,6-dicarboxylic acid dimethyl ester