Synthesis of Ellipticine by Hetaryne Cycloadditions − Control of Regioselectivity
作者:Maite Díaz、Agustín Cobas、Enrique Guitián、Luis Castedo
DOI:10.1002/1099-0690(200112)2001:23<4543::aid-ejoc4543>3.0.co;2-#
日期:2001.12
We have modified Gribble’s and Moody’s approaches to ellipticines by introducing substituents into the 3,4-didehydropyridine dienophile to control the key cycloaddition step. A chloro substituent at position 2 improved the yields and the regioselectivities of the cycloadditions and the overall efficiency of the synthesis of ellipticine.
我们通过向3,4-didehydropyridined dienophile中引入取代基来控制关键的环加成步骤,从而改进了Gribble和Moody对玫瑰树碱的制备方法。2位的氯取代基提高了环加成的产率和区域选择性以及玫瑰树碱的合成总效率。