A stereoselective synthesis of dinucleotide phosphorothioates, using chiral phosphoramidites as intermediates
作者:Yi Jin、Giancarlo Biancotto、George Just
DOI:10.1016/0040-4039(95)02355-0
日期:1996.2
1,2-Di-O-cyclopentylidene-5-isopropylamino-D-xylofuranose 4 and its enantiomer ent-4 were used as chiral auxiliaries to form, respectively, Rp and Sp dinucleotide phosphorothioates 11 and 12 in 98% diastereomeric excess, using phosphoramidite methodology and 2-bromo-4,5-dicyanoimidazole as catalyst.
1,2-二-O-环戊叉基-5-异丙基氨基-D-木呋喃糖4和其对映体ent-4被用作手性助剂,使用亚磷酰胺分别形成Rp和Sp二核苷酸硫代磷酸酯11和12,其非对映体过量为98%。方法和2-溴-4,5-二氰基咪唑作为催化剂。