Novel Imidazoles and Hydantoins Moderately Strained by Incorporation with 2-Azabicyclo[2.2.1]heptene Skeleton
作者:Tomoshige Kobayashi、Hiroki Fujieda、Yoriko Murakami、Takehiro Nakamura、Katsuhiko Ono、Shin-ya Yamamoto、Hiroshi Kato
DOI:10.1246/bcsj.67.3082
日期:1994.11
The reactions of 3-acyl-2-azabicyclo[2.2.1]hept-5-enes with phenyl isocyanate, phenyl isothiocyanate, and ethoxycarbonyl isothiocyanate followed by cyclization reactions under basic conditions respectively provided a hydantoin, a thiohydantoin, and a 1,3-dihydro-2H-imidazole-2-thione incorporated with the azabicyclic skeleton. Treatment of the imidazolethione with Raney nickel gave a phenyl-substituted
3-酰基-2-氮杂双环[2.2.1]庚-5-烯与异氰酸苯酯、异硫氰酸苯酯和异硫氰酸苯酯的反应,然后在碱性条件下进行环化反应,分别得到乙内酰脲、硫代乙内酰脲和1,3 -dihydro-2H-imidazole-2-thione 与氮杂双环骨架结合。用阮内镍处理咪唑硫酮得到与 2-氮杂双环[2.2.1]庚-2-烯稠合的苯基取代的咪唑。讨论了环化对咪唑环的 13C NMR 的影响。