Process for the preparation of phosphorothioate triesters
申请人:——
公开号:US20030099981A1
公开(公告)日:2003-05-29
A process for the synthesis of a phosphorothioate triester is provided. The process comprises the coupling of an H-phosphonate with an alcohol in the presence of a solution comprising both a coupling agent and a sulfur transfer agent. Preferably, the H-phosphorate and alcohol are protected nucleosides or oligonucleotides.
A process for the synthesis in solution phase of a phosphorothioate triester is provided. The process comprises the solution phase coupling of an H-phosphonate with an alcohol in the presence of a coupling agent to form an H-phosphonate diester. The H-phosphonate diester is oxidised in situ with a sulfur transfer agent to produce the phosphorothioate triester. Preferably, the H-phosphonate and alcohol are protected nucleosides or oligonucleotides. Oligonucleotide H-phosphonates which can be used in the formation of phosphorothioate triesters are also provided.
The invention provides a novel method for producing an oligonucleotide using a nucleoside or oligonucleotide that is easy to isolate and has high storage stability. The oligonucleotide production method includes a step of subjecting a nucleoside or oligonucleotide having a pseudo solid phase-protecting group in at least one location selected from the group consisting of 2'-position, 3'-position, 5'-position and a nucleobase moiety and having a 5'-hydroxyl group or a 3'-hydroxyl group, to H-phosphonation to convert the 5'-hydroxyl group or the 3'-hydroxyl group into an H-phosphonated form.
METHOD FOR PRODUCING OLIGONUCLEOTIDE HAVING PHOSPHOROTHIOATE SITE
申请人:AJINOMOTO CO., INC.
公开号:EP3950698A1
公开(公告)日:2022-02-09
A method for producing an oligonucleotide having a phosphorothioated site, including a step of obtaining a phosphite form or a phosphorous acid diester form by coupling a nucleoside, nucleotide or oligonucleotide wherein a 5'-hydroxy group is not protected, and other group is optionally protected by a protecting group used for nucleic acid synthesis or bonded to a solid phase carrier, and a nucleoside, nucleotide or oligonucleotide wherein a 3'-hydroxy group or a 3'-amino group is modified by a method for forming a phosphite form or a phosphorous acid diester form, and other group is optionally protected by a protecting group used for nucleic acid synthesis in the presence of an antioxidant.
A process for the synthesis in solution phase of a phosphorothioate triester is provided. The process comprises the solution phase coupling of an H-phosphonate with an alcohol in the presence of a coupling agent to form an H-phosphonate diester. The H-phosphonate diester is oxidised in situ with a sulfur transfer agent to produce the phosphorothioate triester. Preferably, the H-phosphonate and alcohol are protected nucleosides or oligonucleotides. Oligonucleotide H-phosphonates which can be used in the formation of phosphorothioate triesters are also provided.