One-Pot Preparation of 3-(2-Oxoalkyl)-1,2-naphthoquinones by Photochemical Reaction of 1,2-Naphthoquinones with Enol Ethers
作者:Akio Takuwa、Hidetoshi Iwamoto、Yutaka Nishigaichi、Kiyoshi Yamanaka
DOI:10.1055/s-1993-25856
日期:——
3-(2-Oxoalkyl)-1,2-naphthoquinones were synthesized facilely by photochemical reaction of 1,2-naphthoquinones with 2-methoxy-1-alkenes and subsequent oxidation of the photoadducts in one pot. Similarly, 3-phenacyl-, 3-formylmethyl- and 3-ethoxycarbonyl-methyl-1,2-naphthoquinones were obtained in excellent to good yields by reaction of 1,2-naphthoquinones with α-methoxystyrene, ethyl vinyl ether and 1,1-diethoxyethene, respectively.
3-(2-氧烯基)-1,2-萘醌通过1,2-萘醌与2-甲氧基-1-烯烃的光化学反应,随后对光加成产物进行氧化,一锅法合成。类似地,通过1,2-萘醌与α-甲氧基苯乙烯、乙烯醚和1,1-二乙氧基乙烯的反应,分别获得了3-苯乙酰基、3-甲醛甲基和3-乙氧羰基甲基-1,2-萘醌,产率优良至良好。