NOVEL ANTITHROMBOTIC DIADENOSINE TETRAPHOSPHATES AND RELATED ANALOGS
申请人:Yanachkov Ivan Borisso
公开号:US20110257252A1
公开(公告)日:2011-10-20
The invention features compounds of formula I and methods of their use as antiplatelet and antithrombotic compounds: H/N=Qχ2OOOOΛQ2-N, HR6/NIf)(̂XMO-MγτOM°τX1MQ′)r(̂rfHOOHHOOQHiNχiR2 Formula (I).
US8575127B2
申请人:——
公开号:US8575127B2
公开(公告)日:2013-11-05
Synthesis of 2-substituted 6-methyl-9-.BETA.-D-ribofuranosylpurines.
作者:SHINJI SAKATA、SEISHIRO YONEI、HIROSHI YOSHINO
DOI:10.1248/cpb.30.2583
日期:——
A new method for the synthesis of 2-substituted 6-methylpurine ribosides from guanosine is described. Reaction of N (2), O (2'), O (3'), O (5')-tetraacetyl-O (6)-p-toluenesulfonylguanosine with carbanion from ethylacetoacetate gave the 6-ethoxycarbonylmethyl derivative, which was further converted to 2-amino-6-methylpurine riboside by deacetylation and decarboxylation. Replacement of the amino group of the compound by the fluoro group was achieved by the Schiemann reaction. The fluoro group could easily be replaced by several nucleophiles. As a result, 2-methylthio-, and 2-dimethylamino-6-methyl-9-β-D-ribofuranosylpurines could be effectively prepared.