amino)-4,5-dihydro-3-furancarbonitriles 1a−i reacted with acetyl chloride to yield the corresponding ring-opening products 2a−i. The cyclization of compounds 2a−f with bases gave the corresponding N,N-disubstituted 1-cyanocyclopropanecarboxamides 3a−c and (E)-1-cyano-2-phenylcyclopropanecarboxamides 3d−f. The same compounds 3d−f were also obtained by treatment of compounds 2g−i with sodium methoxide. (©
2-(双取代
氨基)-4,5-二氢-3-
呋喃甲腈 1a-i 与
乙酰氯反应生成相应的开环产物 2a-i。化合物 2a-f 与碱的环化得到相应的 N,N-二取代 1-
氰基
环丙烷甲酰胺 3a-c 和 (E)-1-
氰基-2-苯基
环丙烷甲酰胺 3d-f。通过用
甲醇钠处理化合物2g-i也获得了相同的化合物3d-f。(© Wiley-
VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)