Synthesis of N3- and 2-NH<sub>2</sub>-substituted 6,7-diphenylpterins and their use as intermediates for the preparation of oligonucleotide conjugates designed to target photooxidative damage on single-stranded DNA representing the bcr–abl chimeric gene
作者:Conor W. Crean、Russell Camier、Mark Lawler、Clarke Stevenson、R. Jeremy H. Davies、Peter H. Boyle、John M. Kelly
DOI:10.1039/b413655a
日期:——
5-amino-7-methylthiofurazano[3,4-d]pyrimidine 4 via an unusual highly resonance stabilised cation 8, incorporating the rare 2H,6H-pyrimido[6,1-b][1,3]oxazine ring system. In the characterisation of 10 two pteridine phosphazenes, 15 and 29, were obtained, as well as new products containing two uncommon tricyclic ring systems, namely pyrimido[2,1-b]pteridine (20 and 24) and pyrimido[1,2-c]pteridine (27). In the
制备了两个17-mer寡脱氧核苷酸5'-连接的(6,7-二苯基蝶呤)共轭物2和3作为光敏剂,用于将光氧化损伤靶向代表嵌合bcr-abl的34-mer DNA寡脱氧核苷酸(ODN)片段1。该基因与慢性粒细胞白血病(CML)的发病机制有关。17聚体中的碱基序列是3'GGTAGTTATTCCTTCT T5'。在这些ODN共轭物的第一个(2)中,蝶呤通过-(CH2)3OPO(OH)-接头在其N3原子处连接到ODN的5'-OH基团。使用亚磷酰胺方法,由2-氨基-3-(3-羟丙基)-6,7-二苯基-4(3H)-蝶啶酮10制备缀合物2。起始材料10是由5-氨基-7-甲基硫代呋喃并[3,4-d]嘧啶4通过不寻常的高度共振稳定的阳离子8结合稀有的2H制备而成的,6H-嘧啶基[6,1-b] [1,3]恶嗪环系统。在表征10个化合物时,获得了15个和29个两个蝶啶磷腈,以及包含两个不常见的三环系统的新产品,即嘧啶并[2