名称:
Preparation of N3-thymidine–butylene–N3-thymidine interstrand cross-linked DNA via an orthogonal deprotection strategy
摘要:
A DNA duplex containing an N3-thymidine-butylene-N3-thymidine interstrand cross-link (ICL) was prepared using an on-column orthogonal deprotection strategy to permit different nucleotide sequence composition around the cross-linked site. The conditions used to remove 5'-O-allyloxycarbonyl and 3'-O-tert-butyldimethylsilyl protective groups for various on-column oligonucleotide intermediates did not affect the cross-linked lesion. Efficient removal of these groups enabled successful coupling of 2'-de-oxyphosphoramidites to produce the desired duplex with a 31% yield after deprotection and purification. (C) 2012 Elsevier Ltd. All rights reserved.
DOI:
10.1016/j.tet.2012.07.043