18 O]oxathiaphospholane)s suitable for stereocontrolled synthesis of P-chiral oligonucleotide [ 18 O]phosphorothioates and [ 18 O]phosphates were synthesized. Obtained in that way "chimeric" oligonucleotide d[A PO A PS-Rp,Sp A PS-Rp , Sp A PS-Rp C PS(18O)-Rp G PS-Rp T PS-Rp T PS-Rp,Sp T PO T] was used for determination of the stereochemistry of hydrolysis by endonuclease from Serratia marcescens .
非对映异构纯的,同位素标记的 5'-O -
DMT-nucleoside-3'-O -(2-thio-4,4-"spiro"-pentamethylene-1,3,2-[ 18 O]oxathiaphospholane)s 和 -(合成了适用于立体控制合成 P-手性寡核苷酸 [ 18 O]
硫代磷酸酯和 [ 18 O]
磷酸酯的 2-氧代-4,4-“螺”-五亚甲基-1,3,2-[ 18 O] 氧
硫杂
磷杂环戊烷。以这种方式获得“嵌合”寡核苷酸 d[A PO A PS-Rp,Sp A PS-Rp , Sp A PS-Rp C PS(18O)-Rp G PS-Rp T PS-Rp T PS-Rp,Sp T PO T] 用于测定粘质沙雷氏菌的核酸内切酶
水解的立体
化学。