作者:Rogier C. Buijsman、Jeroen W.J. Schipperijn、Esther Kuyl-Yeheskiely、Gijs A. van der Marel、Constant A.A. van Boeckel、Jacques H. van Boom
DOI:10.1016/s0960-894x(97)00351-x
日期:1997.8
A synthesis is presented of the cyclic trimeric d-oligonucleotide 3'-isopropylphosphate I, comprising one formacetal and two (3' --> 5')-internucleosidic phosphodiester bonds, The ester linkages connect d-guanosine with the 3' and 5' ends of thymidine and 5-hydroxymethyl-2'-deoxyuridine-3'-isopropylphosphate (HMDUpiPr), respectively. The 5'-end of the thymidine unit is anchored via the formacetal bond to the allylic hydroxyl group of HMDUpiPr. The cyclic arrangement of the three d-nucleosides in I mimics, as based on molecular modeling, the key structural features of the conformationally constrained T(7)pG(8)pT(9) p-domain of the thrombin-binding DNA aptamer d(G(1)G(2)T(3)T(4)G(5)G(6)T(7)G(8)T(9)G(10)G(11)T(12)T(13)G(14)G(15)). Biological evaluation showed that compound I did not exhibit anti-thrombin activity. (C) 1997 Elsevier Science Ltd.