Nucleoside modifications by palladium catalyzed methods
First Claim
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1. A method for the preparation of a pyrimidine nucleoside modified at the 5- or 6-position of the pyrimidine ring comprising the steps of:
- reacting a pyrimidine starting material containing a leaving group attached to the 5- or 6-position of said pyrimidine starting material with a functionalized alkene having the formula;
##STR40## wherein Y is --CHROH;
R is independently selected from the group consisting of H, alkyl, alkenyl and aryl; and
n is an integer from 0-15in the presence of a palladium catalyst of the general formula PdL3 or PdL4, wherein L is a ligand of palladium to produce a pyrimidine nucleoside having the following formula;
##STR41## and isolating said modified nucleoside.
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Abstract
This invention discloses a method for the preparation of 2'"'"'-modified nucleosides, using a palladium catalyst and an alkene functionalized with a heteroatom. Included in the invention are the novel pyrimidines and purines that can be prepared according to the method of the invention and oligonucleotides containing said modified pyrimidines and purines.
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Citations
20 Claims
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1. A method for the preparation of a pyrimidine nucleoside modified at the 5- or 6-position of the pyrimidine ring comprising the steps of:
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reacting a pyrimidine starting material containing a leaving group attached to the 5- or 6-position of said pyrimidine starting material with a functionalized alkene having the formula;
##STR40## wherein Y is --CHROH;R is independently selected from the group consisting of H, alkyl, alkenyl and aryl; and n is an integer from 0-15 in the presence of a palladium catalyst of the general formula PdL3 or PdL4, wherein L is a ligand of palladium to produce a pyrimidine nucleoside having the following formula;
##STR41## and isolating said modified nucleoside. - View Dependent Claims (2, 3, 4, 5, 6, 7, 10, 11, 12, 13)
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8. A method for the preparation of a pyrimidine nucleoside modified at the 5- or 6-position of the pyrimidine ring comprising the steps of:
reacting a pyrimidine starting material containing a leaving group attached to the 5- or 6-position of said pyrimidine starting material with a functionalized alkene having the formula;
##STR43## wherein Y is selected from the group consisting of --C(O)R, --COOR, --C(O)NRR'"'"', --CN, phenyl, 2-, 3- or 4-hydroxyphenyl, 2-, 3- or 4-pyridyl and 1H-tetrazol-5-yl;
R and R'"'"' are independently selected from the group consisting of H, alkyl, alkenyl and aryl; and
n is an integer from 1-15 in the presence of a palladium catalyst of the general formula PdL3 or PdL4, wherein L is a ligand of palladium to produce a pyrimidine nucleoside having the following formula;
##STR44## and isolating said modified nucleoside.- View Dependent Claims (9, 19, 20)
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14. A compound selected from the group consisting of:
- wherein Y is selected from the group consisting of --CHROH, --C(O)R, --COOR, --C(O)NRR'"'"', --CN, phenyl,1-, 2-, 3- or 4-hydroxyphenyl, 2-, 3- or 4-pyridyl and 1H-tetrazol-5-yl;
Z is selected from the group consisting of H, ribose, deoxyribose and dideoxyribose and derivatives thereof; R and R'"'"' are independently selected from the group consisting of H, alkyl, alkenyl or aryl; and n is an integer from 0-15. - View Dependent Claims (15, 16, 17, 18)
- wherein Y is selected from the group consisting of --CHROH, --C(O)R, --COOR, --C(O)NRR'"'"', --CN, phenyl,1-, 2-, 3- or 4-hydroxyphenyl, 2-, 3- or 4-pyridyl and 1H-tetrazol-5-yl;
Specification