A new synthetic route to oligoribonucleotides based on CpRu-catalyzed deallylation
摘要:
A triribonucleotide 3-5 U, which is fully protected by an allyl group at the T-hydroxy and phosphoric acid positions was synthesized, the deprotection being quantitatively achieved by use of a catalytic amount of CpRu(eta(3)-C3H5)(2-quinolinecarboxylato) in methanol. The reaction is completed within 30 min at ambient temperature. The utility of the simple allyl protecting group has the potential to open a new pathway in the synthesis of RNA-related compounds. (c) 2007 Elsevier Ltd. All rights reserved.
Simplified synthesis of 2′-O-alkyl ribopyrimidines
摘要:
Direct 2'-hydroxyl alkylation (R= methyl, ethyl, propyl, pentyl or allyl) of 5'-dimethoxytrityl-N-(t-butylphenoxyacetyl or benzoyl)-cytidine 1 was achieved by reaction in the presence of silver I oxide and a catalytic amount of pyridine with excess alkyl halide. AT 0 degrees C alkylation of the 2'-hydroxyl was found to be highly selective; less than 10% dl (2'3')-O-alkylated or 3'-O-alkylated side products were detected in most cases. Quantitative deamination of 2'-O-alkylated cytidines to 2'-O-alkylated uridines were performed by refluxing in 4M aq. LiOH solution. This method simplifies access to various 2'-O-alkylated ribopyrimidines using readily available starting materials in one or two steps.
[EN] TRANSTHYRETIN (TTR) IRNA COMPOSITIONS AND METHODS OF USE THEREOF FOR TREATING OR PREVENTING TTR-ASSOCIATED OCULAR DISEASES<br/>[FR] COMPOSITION D'ARNI DE LA TRANSTHYRÉTINE (TTR) ET SES PROCÉDÉS D'UTILISATION POUR LE TRAITEMENT OU LA PRÉVENTION DE MALADIES OCULAIRES ASSOCIÉES À TTR
申请人:ALNYLAM PHARMACEUTICALS INC
公开号:WO2021092145A8
公开(公告)日:2021-07-08
US6090932A
申请人:——
公开号:US6090932A
公开(公告)日:2000-07-18
A new synthetic route to oligoribonucleotides based on CpRu-catalyzed deallylation
A triribonucleotide 3-5 U, which is fully protected by an allyl group at the T-hydroxy and phosphoric acid positions was synthesized, the deprotection being quantitatively achieved by use of a catalytic amount of CpRu(eta(3)-C3H5)(2-quinolinecarboxylato) in methanol. The reaction is completed within 30 min at ambient temperature. The utility of the simple allyl protecting group has the potential to open a new pathway in the synthesis of RNA-related compounds. (c) 2007 Elsevier Ltd. All rights reserved.
Simplified synthesis of 2′-O-alkyl ribopyrimidines
作者:Richard P. Hodge、Nanda D. Sinha
DOI:10.1016/0040-4039(95)00435-f
日期:1995.4
Direct 2'-hydroxyl alkylation (R= methyl, ethyl, propyl, pentyl or allyl) of 5'-dimethoxytrityl-N-(t-butylphenoxyacetyl or benzoyl)-cytidine 1 was achieved by reaction in the presence of silver I oxide and a catalytic amount of pyridine with excess alkyl halide. AT 0 degrees C alkylation of the 2'-hydroxyl was found to be highly selective; less than 10% dl (2'3')-O-alkylated or 3'-O-alkylated side products were detected in most cases. Quantitative deamination of 2'-O-alkylated cytidines to 2'-O-alkylated uridines were performed by refluxing in 4M aq. LiOH solution. This method simplifies access to various 2'-O-alkylated ribopyrimidines using readily available starting materials in one or two steps.