申请人:NIPPON ZEON CO., LTD.
公开号:EP0216357A2
公开(公告)日:1987-04-01
Phosphoramidite compounds of the general formula
wherein each of R, and R2 represents a hydroxyl group having a protective group, or the group -OR4, R3 represents a hydrogen atom, a hydroxyl group having a protective group, or the group -OR4, R4 represents the group
X represents a secondary amino group, R5 represents an allylic residue or a protective group capable of being split off by beta-cleavage, and BAOC represents a nucleoside base residue in which the amino or imino group is protected with an allyloxycarbonyl-type residue, with the proviso that only one of R,, R2 and R3 represents the group-OR4. The compounds can be produced by reacting a nucleoside represented by the general formula
wherein each of R'1 and R'2 cepresents a hydroxyl group which may have a protective group, R'3 represents a hydrogen atom, or a hydroxyl group which may have a protective group, and BAOC is as defined, with the proviso that only one of R'1, R'2 and R'3 is a hydroxyl group, with a phosphoramide compound represented by the general formula
wherein X and R5 are as defined, and Y represents a secondary amino group or a halogen atom.
通式如下的磷酰胺化合物
其中 R 和 R2 分别代表具有保护基团的羟基或基团-OR4,R3 代表氢原子、具有保护基团的羟基或基团-OR4,R4 代表基团
X 代表仲氨基,R5 代表烯丙基残基或能通过β-裂解作用分离的保护基团,BAOC 代表核苷碱基残基,其中的氨基或亚氨基用烯丙氧羰基型残基保护,但 R、R2 和 R3 中只有一个代表基团-OR4。这些化合物可通过与通式如下的核苷反应制得
其中 R'1 和 R'2 各代表一个可带有保护基团的羟基,R'3 代表氢原子或可带有保护基团的羟基,BAOC 如所定义,但 R'1、R'2 和 R'3 中只有一个是羟基。
其中 X 和 R5 如所定义,Y 代表仲氨基或卤原子。