ethyl 6-allyl-3-methyl-4'-nitro-4-(4-nitrobenzyl)-5-prop-2-ynyloxy-biphenyl-2-carboxylate 在
Grubbs catalyst first generation 作用下,
以
二氯甲烷 为溶剂,
反应 24.0h,
以55%的产率得到ethyl 8-methyl-9-(4-nitrobenzyl)-6-(4-nitrophenyl)-3-vinyl-2,5-dihydro-benzo[b]oxepine-7-carboxylate