Highly diastereoselective [3+3] cycloaddition of indolin-3-ones and nitroallylic acetates: Efficient access to polysubstituted dihydropyrano[3,2-b]indoles
作者:Qian Zhao、Ben-Hong Chen、He-Ping Li、Ting-Ting Yu、Cheng Peng、Xiang-Hong He、Wei Huang
DOI:10.1016/j.tet.2023.133275
日期:2023.3
dihydropyrano[3,2-b]indole, had been much less explored. Herein, the highly diastereoselective [3 + 3] cycloaddition of indolin-3-ones with nitroallylic acetates were developed for the efficient synthesis of a series of polysubstituted dihydropyrano[3,2-b]indoles in good to high yields with exclusive diastereoselectivities. Different from previous reports, this approach employed a base-promoted cycloaddition
二氢吡喃并 [2,3- b ] 吲哚是一种特殊的二氢吲哚基序,而其类似物二氢吡喃并 [3,2- b ] 吲哚则鲜为人知。在此,开发了 indolin-3-one 与硝基烯丙基乙酸酯的高度非对映选择性 [3 + 3] 环加成,用于高效合成一系列多取代的二氢吡喃并 [3,2- b] 吲哚,产率高,具有独特的非对映选择性。与之前的报道不同,该方法采用碱基促进的环加成策略来组装具有药理学意义的二氢吡喃并 [3,2- b ] 吲哚支架。