The identity of the major product of Ru-catalysed alkene metathesis of two polyene substrates has been determined using density functional theory (DFT) NMR prediction, a1H–1H Total Correlated Spectroscopy (TOCSY) NMR experiment and ultimately by single-crystal X-ray crystallography. The substrates were designed as those that would potentially allow expedient access to thetrans-decalin skeleton of the natural product (−)-euonyminol, but the product was found to be a bis-cyclopentenyl-β-cyanohydrin [1-(1-hydroxycyclopent-3-en-1-yl)cyclopent-3-ene-1-carbonitrile, C11H13NO] rather than thetrans-2,3,6,7-dehydrodecalin-β-cyanohydrin.
利用密度泛函理论(DFT)核磁共振预测、1H-1H 全相关光谱(TOCSY)核磁共振实验以及最终的单晶 X 射线晶体学,确定了 Ru 催化两种多烯底物的烯烃复分解反应的主要产物的身份。设计底物的目的是为了能够方便地获得天然产物 (-)-euonyminol 的反式萘烷骨架,但发现产物是双环戊烯基-β-氰醇[1-(1-羟基环戊烯-3-烯-1-基)环戊烯-3-烯-1-甲腈,C11H13NO],而不是反式-2,3,6,7-脱氢萘烷-β-氰醇。