ACTIVATED NUCLEOSIDE PHOSPHORAMIDITES AND METHODS FOR THE PREPARATION AND USE THEREOF
申请公布号:CA2174216(A1)
申请号:CA19952174216
申请日期:1995.08.18
申请公布日期:1996.03.17
发明人:REDDY, PARAMESWARA;FAROOQUI, FIRDOUS
分类号:C07H19/073;C07H19/10;C07H19/173;C07H19/20;C07H21/00;C07H21/02;C07H21/04;(IPC1-7):C07H21/00
主分类号:C07H19/073
摘要:<p>Activated nucleoside derivatives formed in situ of general formula (I) in which one of RA and RB is R3 and the other is -P(R2)OR1, wherein R1 is a substituted arylcarbonyl group, R2 is R4O or R5, R3 is a hydroxyl-protecting group and B is a purine or pyrimidine base. Particularly preferred are those compounds wherein R1 is 2,4-dinitrophenylcarbonyl. The compounds of general formula (I) are prepared using the corresponding carboxylic acids; these acids are generally more soluble in acetonitrile (for example, to the extent of 1.5 M for 2,4-dinitrobenzoic acid) and work as activators at lower concentrations. The compounds of general formula (I) may be employed in conventional coupling reactions (for example, solid phase synthesis) to prepare oligonucleotides which are indistinguishable from those prepared using the heretofore-known tetrazole-activated nucleoside intermediates.</p>
PROCEDE DE FABRICATION DE CABLE A FIBRES OPTIQUES
INCLINOMETRE, NOTAMMENT POUR VEHICULES
BRULEUR A GAZ, PROCEDE DE FABRICATION DUDIT BRULEUR ET CHAUDIERE UTILISANT UN TEL BRULEUR
ACIER AUSTENITIQUE POUR MOULAGE, RESISTANT A LA CHALEUR
MACHINE A CINTRER A CINQ CYLINDRES
COUVERCLE EN MATERIAU EN FEUILLE POUR RECIPIENT RECTANGULAIRE AINSI QUE PROCEDE POUR SA FABRICATION
UN DISPOSITIVO CONECTADOR DE BORDE PARA PLACAS DE CIRCUITO
PROCEDIMIENTO PARA PREPARAR UN NUEVO DERIVADO DE FENILPRO- PARGILAMINA
UNA DISPOSICION MEJORADA DE ENTRADA DE COMBUSTIBLE PARA UN REACTOR DE COMBUSTIBLE
PROCEDIMIENTO DE FABRICACION DE CABEZAS MAGNETICAS DE REGIS-TRO Y DE LECTURA DE DATOS
PERFECCIONAMIENTOS EN APARATOS DE CRIBA ROTATORIOS PARA LA SEPARACION DE SOLIDOS DE UN LIQUIDO
PROCEDIMIENTO PARA LA FABRICACION DE LADRILLOS REFRACTARIOS NO COCIDOS
UNA ESTRUCTURA ESTRATIFICADA PARA USARSE EN LA CONSTRUCCION DE PAREDES