Abstract：
:The calcium-sensing receptor antagonist (CaSR) has been recognized as a promising target of anabolic agents for treating osteoporosis. In the course of developing a new drug candidate for osteoporosis, we found tetrahydropyrazolopyrimidine derivative 1 to be an orally active CaSR antagonist that stimulated transient PTH secretion in rats. However, compound 1 showed poor physical and chemical stability. In order to work out this compound's chemical stability and further understand its in vivo efficacy, we focused on modifying the 2-position of the tetrahydropyrazolopyrimidine. As a result of chemical modification, we discovered (5R)-N-[1-ethyl-1-(4-ethylphenyl)propyl]-2,7,7-trimethyl-5-phenyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidine-3-carboxamide monotosylate 10m (TAK-075), which showed improved solubility, chemical stability, and in vivo efficacy. Furthermore, we describe that evaluating the active metabolite is important during repeated treatment with short-acting CaSR antagonists.
journal_name
Bioorg Med Chemjournal_title
Bioorganic & medicinal chemistryauthors
Yoshida M,Mori A,Morimoto S,Kotani E,Oka M,Notoya K,Makino H,Ono M,Shirasaki M,Tada N,Fujita H,Ban J,Ikeda Y,Kawamoto T,Goto M,Kimura H,Baba A,Yasuma Tdoi
10.1016/j.bmc.2011.02.001subject
Has Abstractpub_date
2011-03-15 00:00:00pages
1881-94issue
6eissn
0968-0896issn
1464-3391pii
S0968-0896(11)00097-6journal_volume
19pub_type
杂志文章abstract：:The aim of this work was to synthesize a set of heterocyclic derivatives of lupane, lup-20(29)-ene, and 18α-oleanane, and to investigate their cytotoxic activities. Some of those heterocycles were previously known in the oleanane (allobetulin) group; however, to our knowledge the syntheses and biological activities of...
journal_title：Bioorganic & medicinal chemistry
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journal_title：Bioorganic & medicinal chemistry
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journal_title：Bioorganic & medicinal chemistry
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journal_title：Bioorganic & medicinal chemistry
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pub_type： 杂志文章
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更新日期：2008-01-01 00:00:00
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更新日期：2008-06-01 00:00:00
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journal_title：Bioorganic & medicinal chemistry
pub_type： 杂志文章
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journal_title：Bioorganic & medicinal chemistry
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journal_title：Bioorganic & medicinal chemistry
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journal_title：Bioorganic & medicinal chemistry
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更新日期：2017-04-01 00:00:00
