A Novel Cyclization Reaction of Alkylthiodiphenylcyclopropenium Ions with Acyclic 1,3-Diketones to Give Cyclopentadienols
作者:Hiroshi Yoshida、Mikito Nakajima、Tsuyoshi Ogata、Kiyoshi Matsumoto、R. Morrin Acheson、John D. Wallis
DOI:10.1246/bcsj.56.3015
日期:1983.10
2,4-pentanedione (3a) and ethyl acetoacetate (3b) yielded the cyclopentadienol derivatives (4) by ring expansion. One of the products 4a was shown to be 4-acetyl-5-hydroxy-5-methyl-1-methylthio-2,3-diphenyl-1,3-cyclopentadiene by X-ray crystallography. Chemical transformation of the products yielded some cyclopentenones. Triphenylcyclopropenium perchlorate reacted with 3a and 3b affording the ketocyclopropene
甲硫基、乙硫基和苄硫基二苯基环丙烯盐与 2,4-戊二酮 (3a) 和乙酰乙酸乙酯 (3b) 的反应通过扩环得到环戊二烯醇衍生物 (4)。通过 X 射线晶体学显示,产物 4a 之一是 4-乙酰基-5-羟基-5-甲基-1-甲硫基-2,3-二苯基-1,3-环戊二烯。产物的化学转化产生了一些环戊烯酮。高氯酸三苯基环丙烯鎓与 3a 和 3b 反应,以良好的收率得到酮环丙烯。