A Convenient Synthesis of New Purinyl-<i>homo</i>-carbonucleosides on a Cyclopentane Ring Fused with Pyridazine
作者:Olga Caamaño、Generosa Gómez、Franco Fernández、Marcos García、Xerardo García-Mera、Eric De Clercq
DOI:10.1055/s-2004-834870
日期:——
The new purinyl homo-carbonucleosides 10 and 17a were prepared from 1,4-diphenyl-5,8-dihydro-5,8-methanophthalazine by one-pot ozonolysis and reductive cleavage, followed by monoprotection with an Ac or TBDMS group, mesylation of the resulting diol and replacement of the mesyl group with 6-chloropurine in the presence of NaH and 18-crown-6 ether. Homo-carbonucleosides 12 and 13 were then obtained from 10 by substitution of the chlorine in purine position 6. Compounds 17b and 19 were obtained from 17a in the same way.
新的嘌呤同碳核苷 10 和 17a 由 1,4-二苯基-5,8-二氢-5,8-甲酞嗪通过一锅臭氧分解和还原裂解制备而成,然后用 Ac 或 TBDMS 基团进行单保护,在 NaH 和 18-冠醚存在下,对所得二醇进行甲磺酰化,并用 6-氯嘌呤取代甲磺酰基。然后通过取代嘌呤位 6 上的氯,从 10 中得到同碳核苷 12 和 13。用同样的方法从 17a 中得到化合物 17b 和 19。