Disclosed are a coupling unit of a (6-4) photoproduct represented by the formula (I):
wherein R1 represents a protective group, R2 represents a methyl group or a 2-cyanoethyl group, and R3 represents
wherein R5 represents a methyl group or a 2-cyanoethyl group, and R6 represents a -N(R')(R'') group, a N-morpholino group, a N-pyrrolidinyl group or a 2,2,6,6-tetramethyl-N-piperidyl group where R' and R'' each represent a lower alkyl group,
a process for preparing the same, a process for preparing an oligonucleotide containing a (6-4) photoproduct by using the same, and a process for preparing DNA containing a (6-4) photoproduct by using the same.
本发明公开了一种由式(I)代表的(6-4)光产物的偶联单元:
其中 R1 代表保护基团,R2 代表甲基或 2-
氰乙基,R3 代表
其中 R5 代表甲基或 2-
氰乙基,R6 代表-N(R')(R'')基团、N-吗啉基团、N-
吡咯烷基团或 2,2,6,6-四甲基-N-
哌啶基团,其中 R' 和 R''各自代表低级烷基、
制备上述物质的工艺、利用上述物质制备含有 (6-4) 光加成物的寡核苷酸的工艺,以及利用上述物质制备含有 (6-4) 光加成物的 DNA 的工艺。