Dimethyl 2-{3,3-Bis(methoxycarbonyl)bicyclo[2.2.1]hept-5-en-2-yl}malonate. Synthesis and Base-Catalyzed C–C Bond Cleavage Reaction
作者:Kenji Kitano、Nobuya Katagiri、Chikara Kaneko
DOI:10.1246/cl.1994.1285
日期:1994.7
The reaction of cyclopentadiene with 1,1,3,3-tetrakis(methoxycarbonyl)propene gives an endo and exo mixture of dimethyl 2-3,3-bis(methoxycarbonyl)bicyclo-[2.2.1]hept-5-en-2-yl}malonate, which by base-mediated retro-Michael reaction gives stereoselectively the cis-isomer of dimethyl 2-4-[2,2-bis(methoxycarbonyl)vinyl]cyclopent-2-en-1-yl}malonate.
环戊二烯与 1,1,3,3-四(甲氧基羰基)丙烯反应生成二甲基 2-3,3-双(甲氧基羰基)双环-[2.2.1]hept-5-en-的内型和外型混合物2-基}丙二酸,通过碱介导的逆迈克尔反应,立体选择性地生成 2-4-[2,2-双(甲氧羰基)乙烯基]环戊-2-烯-1-基}丙二酸二甲酯的顺式异构体.