Reactions of Trimethylsilyl Cyanide with Tropone, 2-Phenyltropone, and 2-Methoxytropone. Formations of 2-Cyano-1-hydroxytropylidene Derivatives
作者:Katsuhiro Saito、Hisashi Kojima
DOI:10.1246/bcsj.58.1918
日期:1985.7
Reaction of trimethylsilyl cyanide (TMSCN) with tropone and 2-phenyltropone in the presence of a catalytic amount of zinc iodide in dichloromethane afforded silyl ethers of 7-cyano-1,3,5-cycloheptatriene-1-ol (2a) and 2-phenyl-7-cyano-1,3,5-cycloheptatriene-1-ol (2b), respectively. On the other hand, reaction of TMSCN with 2-methoxytropone gave 2-cyanotropone. Upon hydrolysis, 2a, and 2b yielded 2-cyano-1
在二氯甲烷中催化量的碘化锌存在下,三甲基氰化甲硅烷 (TMSCN) 与托酮和 2-苯基托酮反应,得到 7-氰基-1,3,5-环庚三烯-1-醇 (2a) 和 2- 的甲硅烷基醚苯基-7-氰基-1,3,5-环庚三烯-1-醇 (2b),分别。另一方面,TMSCN 与 2-甲氧基托酮反应得到 2-氰托酮。水解后,2a 和 2b 生成 2-氰基-1,3,5-环庚三烯-1-醇 (3a) 和 2-氰基-7-苯基-1,3,5-环庚三烯-1-醇的互变异构混合物(3b) 和 2-cyano-7-phenyl-3,5-cycloheptadien-1-one (4b)。在二恶烷中用二氧化硒氧化 3a 和 3b 和 4b 的互变异构混合物,分别得到 2-氰基-7-苯基托酮和 2-氰基-7-苯基托酮。