Abstract: A compound useful for treating leukemia or myelodysplastic syndrome, having the structure of formula (I): or a pharmaceutically acceptable salt thereof, wherein R1 is H or —C(?O)—O—R3, and R2 is H or —C(?O)—O—R4, provided R1 and R2 are not both H; and R3 and R4 are each independently selected from the group consisting of alkyl, alkenyl, alkynyl, aryl, arylalkyl, cycloalkyl, cycloheteroalkyl, and heteroalkyl. In an exemplary compound of formula (I), R1 is —C(?O)—O—CH2—CH3, and R2 is H.

Abstract: A compound useful for treating leukemia or myelodysplastic syndrome, having the structure of formula (I): or a pharmaceutically acceptable salt thereof, wherein R is H or —C(?O)—O—R3, and R2 is H or —C(?O)—O—R4, provided R1 and R2 are not both H; and R3 and R4 are each independently selected from the group consisting of alkyl, alkenyl, alkynyl, aryl, arylalkyl, cycloalkyl, cycloheteroalkyl, and heteroalkyl. In an exemplary compound of formula (I), R1 is —C(?O)—O—CH2—CH3, and R2 is H.

Abstract: A compound useful for treating lymphoma, having the structure of formula (I): or a pharmaceutically acceptable salt thereof, wherein R1 is H or —C(?O)—O—R3, and R2 is H or —C(?O)—O—R4, provided R1 and R2 are not both H; and R3 and R4 are each independently selected from the group consisting of alkyl, alkenyl, alkynyl, aryl, arylalkyl, cycloalkyl, cycloheteroalkyl, and heteroalkyl. In an exemplary compound of formula (I), R1 is —C(?O)—O—CH2—CH3, and R2 is H.

Abstract: The present invention provides prodrugs of clofarabine. The compounds of the invention have formula (I), or a pharmaceutically acceptable salt thereof, wherein R1 is H or —C(=0)-X—R3 and R2 is H or —C(=0)-Y—R4, wherein X and Y are each independently O, CH2 or CH(NH2), provided R1 and R2 are not both H; and R3 and R4 are each independently selected from the group of alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, cycloalkyl, substituted cycloalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl and substituted heteroalkyl. Compositions of formula (I) and methods for the treatment of cancer are also provided.

Abstract: The present invention provides compounds according to formula I: and pharmaceutically acceptable salts thereof. For compounds of formula I, R1 and R2 are independently selected from the group consisting of H, —C(?O)—(CH2)2-aryl, and —C(?O)—(CH2)n—C(?O)—NH-aryl. The subscript n is from 2 to 6. R3 is selected from the group consisting of H and —C(?O)—O—R4; and R4 is selected from the group consisting of alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, arylalkyl, substituted arylalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl and substituted heteroalkyl. Compounds are provided wherein at least one of R1 and R2 is other than H. Pharmaceutical compositions, methods for inhibiting the growth of cancer cells, and methods for the treatment of cancer are also provided.

Abstract: The present invention provides compounds according to formula I: and pharmaceutically acceptable salts thereof. For compounds of formula I, R1 and R2 are independently selected from the group consisting of H, —C(?O)—(CH2)2-aryl, and —C(?O)—(CH2)n—C(?O)—NH-aryl. The subscript n is from 2 to 6. R3 is selected from the group consisting of H and —C(?O)—O—R4; and R4 is selected from the group consisting of alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, arylalkyl, substituted arylalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl and substituted heteroalkyl. Compounds are provided wherein at least one of R1 and R2 is other than H. Pharmaceutical compositions, methods for inhibiting the growth of cancer cells, and methods for the treatment of cancer are also provided.

Abstract: The present invention provides compounds according to formula I: and pharmaceutically acceptable salts thereof. For compounds of formula I, R1 and R2 are independently selected from the group consisting of H, —C(?O)—(CH2)2-aryl, and —C(?O)—(CH2)n—C(?O)—NH-aryl. The subscript n is from 2 to 6. R3 is selected from the group consisting of H and —C(?O)—O—R4; and R4 is selected from the group consisting of alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, arylalkyl, substituted arylalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl and substituted heteroalkyl. Compounds are provided wherein at least one of R1 and R2 is other than H. Pharmaceutical compositions, methods for inhibiting the growth of cancer cells, and methods for the treatment of cancer are also provided.

Abstract: The present invention provides compounds according to formula I: and pharmaceutically acceptable salts thereof. For compounds of formula I, R1 and R2 are independently selected from the group consisting of H, —C(?O)—(CH2)2-aryl, and —C(?O)—(CH2)n—C(?O)—NH-aryl. The subscript n is from 2 to 6. R3 is selected from the group consisting of H and —C(?O)—O—R4; and R4 is selected from the group consisting of alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, arylalkyl, substituted arylalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl and substituted heteroalkyl. Compounds are provided wherein at least one of R1 and R2 is other than H. Pharmaceutical compositions, methods for inhibiting the growth of cancer cells, and methods for the treatment of cancer are also provided.

Abstract: The present invention provides compounds according to formula I: and pharmaceutically acceptable salts thereof. For compounds of formula I, R1 and R2 are independently selected from the group consisting of H, —C(?O)—(CH2)2-aryl, and —C(?O)—(CH2)n—C(?O)—NH-aryl. The subscript n is from 2 to 6. R3 is selected from the group consisting of H and —C(?O)—O—R4; and R4 is selected from the group consisting of alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, arylalkyl, substituted arylalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl and substituted heteroalkyl. Compounds are provided wherein at least one of R1 and R2 is other than H. Pharmaceutical compositions, methods for inhibiting the growth of cancer cells, and methods for the treatment of cancer are also provided.

Abstract: The present invention provides compounds according to formula I: and pharmaceutically acceptable salts thereof. For compounds of formula I, R1 and R2 are independently selected from the group consisting of H, —C(?O)—(CH2)2-aryl, and —C(?O)—(CH2)n—C(?O)—NH-aryl. The subscript n is from 2 to 6. R3 is selected from the group consisting of H and —C(?O)—O—R4; and R4 is selected from the group consisting of alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl, substituted alkynyl, arylalkyl, substituted arylalkyl, cycloheteroalkyl, substituted cycloheteroalkyl, heteroalkyl and substituted heteroalkyl. Compounds are provided wherein at least one of R1 and R2 is other than H. Pharmaceutical compositions, methods for inhibiting the growth of cancer cells, and methods for the treatment of cancer are also provided.

Abstract: The present invention provides compounds of formula I and pharmaceutically acceptable salts thereof. The formula I compounds induce mitotic arrest thereby making them useful as anti-cancer agents. The formula I compounds are also useful for the treatment of other diseases which can be treated by inducing mitotic arrest.

Abstract: The present invention provides compounds of formula I 1

Abstract: A compound having the structure: ##STR1## pharmaceutical compositions comprising such compounds, and methods of treating inflammation or pain using such compounds.