Patent number: 6815444
Abstract: This invention features, among others, a pyrazolopyrimidine compound of formula (A):
A is (CH2)q—CHRaRb; each of R1 and R2, independently, is hydrogen, halogen, cyano, nitro, or alkyl; or R1 and R2 taken together is (CH2)r; each of R3 and R4, independently, is hydrogen, halogen, cyano, nitro, or alkyl; each of R5, Ra, and Rb, independently, is aryl, aralkyl, or heteroaryl, optionally substituted with halogen, cyano, nitro, alkyl, aryl, aralkyl, heteroaryl, OR, O(O)CR, C(O)R, C(O)OR, C(O)NRR′, SR, S(O)R, S(O)OR, NRR′, NR(O)CR′, NRC(O)OR′, or NRC(O)NR′R″; each of m, n, o, p, and r, independently, is 0 or 1, and q is 0, 1, or 2; in which each of R, R′, and R″, independently, is hydrogen or alkyl, provided that the sum of m, n, o, and p is 1, 2, 3, or 4.
Type:
Grant
Filed:
May 23, 2003
Date of Patent:
November 9, 2004
Assignee:
National Health Research Institutes
Inventors:
Jyh-Haur Chern, Kak-Shan Shia, Shin-Ru Shih, Tsu-An Hsu, Chia-Liang Tai