Reagent and process for protecting nucleoside hydroxyl groups

   
   

Silylating reagents having a group other than a divalent oxygen separating two silyl groups provide regioselective protection of reactive groups under robust conditions, such as basic conditions used in alkylation, acylation and deoxygenation. In particular, silylating reagents having a group other than oxygen separating two silyl groups are useful for protecting two hydroxy groups of a ribonucleic or deoxyribonucleic acid. Alkylation of a 2'-hydroxy group of a ribonucleoside protected with the inventive silylating agents in the presence of an excess of a mild hindered base such as sodium HMDS may be carried out without protecting the exocyclic amine and oxo functionalities of nucleobases.

Os reagents de Silylating que têm um grupo à excepção de um oxigênio divalent que separa dois grupos do silyl fornecem a proteção regioselective de grupos reactive sob condições robust, tais como as condições básicas usadas no alkylation, no acylation e no deoxygenation. Nos reagents particulares, silylating que têm um grupo à excepção do oxigênio que separa dois grupos do silyl seja útil para proteger dois grupos hydroxy de um ácido ribonucléico ou deoxyribonucleic. O alkylation de um grupo 2'-hydroxy de um ribonucleoside protegido com os agentes silylating inventive na presença de um excesso de uma base hindered suave tal como o sodium HMDS pode ser realizado sem proteger o amine exocyclic e as funcionalidades oxo dos nucleobases.

 
Web www.patentalert.com

< Antibody against human parathormone related peptides

< Chimeric cauliflower mosaic virus 35S-arabidopsis actin 8 promoters and methods of using them

> Multiphoton photosensitization system

> Anti-tachycardia pacing methods and devices

~ 00136