Intramolecular photochemical arylation of N-substituted enaminones: application to synthesis of heterocyclic compounds
作者:Hideo Iida、Yoshifumi Yuasa、Chihiro Kibayashi
DOI:10.1039/c39780000766
日期:——
3-aminocyclohex-2-enones and 1,2,3,3a,4,5-hexahydro-1-(2-halogeno-4,5-methylenedioxybenzyl)indol-6-ones (10) and (11) underwent photochemical cyclisation to yield the five- to seven-membered heterocyclic compounds (5) and the 3,3a,4,5-tetrahydropyrrolo[3,2,1-de]phenanthridine-1,7-(2H)-dione (13), respectively.
3-氨基环己-2-烯酮和1,2,3,3a,4的N-(2-溴苯基)-,N-(2-溴苄基)-和N-(2-溴苯乙基)-衍生物(3) ,(5-)六氢-1-(2-卤代-4,5-亚甲基二氧基苄基)吲哚-6-(10)和(11)经过光化学环化反应生成五至七元杂环化合物(5)和3 ,3a,4,5-四氢吡咯并[3,2,1- de ]菲啶-1,7-(2H)-二酮(13)。
A Practical Approach to 6H-Indol-6-ones Enables the Formal Synthesis of γ-Lycorane
作者:Rui Zhan、Li-Dong Shao、Yang Chen、Xin-Ting Hu、Xiao-Yan Xie、Dashan Li、Chun-Xia Zheng、You-Xi Zhang、Wen-Jing Wang
DOI:10.1055/a-1878-8597
日期:2023.1
We represented herein a two-step synthesis of 1-methyl-6H-indol-6-one which is an N-containing 6/5 fused bicyclic buildingblocks in Amaryllidaceae alkaloids. The key step featured is a ‘one-pot’ ozonolysis/reductive amination/cyclization of allylated cyclohexa-1,3-dione to give bicyclic compounds. Moreover, the formal total synthesis of naturalproduct γ-lycorane could be achieved through a photo-promoted
我们在此展示了 1-methyl-6 H -indol-6-one的两步合成,它是石蒜科生物碱中含N的 6/5 稠合双环结构单元。关键步骤是烯丙基化 cyclohexa-1,3-dione 的“一锅”臭氧分解/还原胺化/环化,得到双环化合物。此外,天然产物 γ-lycorane 的正式全合成可以通过所得双环中间体的光促进环化/氧化级联反应来实现。
Exploitation of intramolecular photochemical arylation of N-substituted enaminones. Efficient, general synthesis of heterocyclic compounds
作者:Hideo Iida、Yoshifumi Yuasa、Chihiro Kibayashi
DOI:10.1021/jo01322a009
日期:1979.4
Ring closure of enaminones via intramolecular electrophilic arylation involving benzyne intermediates and its use in the synthesis of .gamma.-lycoran and related compounds