The P-Stereocontrolled Synthesis of PO/PS-Chimeric Oligonucleotides by Incorporation of Dinucleoside Phosphorothioates Bearing anO-4-Nitrophenyl Phosphorothioate Protecting Group
作者:Lucyna A. Wozniak、Marcin Góra、Małgorzata Bukowiecka-Matusiak、Sophie Mourgues、Geneviève Pratviel、Bernard Meunier、Wojciech J. Stec
DOI:10.1002/ejoc.200400910
日期:2005.7
The synthesis of protected model dinucleoside (3',5')-O-aryl phosphorothioates, their separation into pure diastereomers, and their successful incorporation into oligonucleotides followed by stereospecific deprotection of the O-aryl phosphorothioate function with oximate ion (inversion) enables the preparation of chimeric PO/PS-oligonucleotides with a predetermined sense of P-chirality at each internucleotide
受保护的模型二核苷 (3',5')-O-芳基硫代磷酸酯的合成,将它们分离成纯的非对映异构体,并成功掺入寡核苷酸,然后用肟酸离子(反转)立体特异性脱保护 O-芳基硫代磷酸酯功能,使制备在每个核苷酸间硫代磷酸酯位置具有预定的 P-手性意义的嵌合 PO/PS-寡核苷酸。已经指定了“二聚体结构单元”中核苷酸间 O-芳基硫代磷酸酯的磷的绝对构型。3'-末端 SP-硫代磷酸酯键有效地保护此类嵌合构建体免于被人血浆外切核酸酶降解(© Wiley-VCH Verlag GmbH & Co. KGaA,69451 Weinheim,德国,2005)