当前位置： SCI文献检索 > BIOORGANIC & MEDICINAL CHEMISTRY期刊下所有文献 > Structure-activity relationships of cyclic enediynes related to dynemicin A. I. Synthesis and antitumor activity of 9-acetoxy enediynes equipped with aryl carbamate moieties.

Structure-activity relationships of cyclic enediynes related to dynemicin A. I. Synthesis and antitumor activity of 9-acetoxy enediynes equipped with aryl carbamate moieties.

Abstract：

:A series of the 9-acetoxy enediyne compounds, 6a-k which were simplified from natural dynemicin A, and designed to be equipped with various aryl carbamate moieties, was synthesized and evaluated for DNA-cleaving ability, in vitro cytotoxicity, and in vivo antitumor activity. As a result of this study of the structure-activity relationships (SAR) with regard to the Rt substituent, both compounds 6a and 6f with the phenyl carbamate and 4-chlorophenyl carbamate moiety, respectively, were found to exhibit significant activity (T/C > 200%) against murine P388 leukemia in mice, in spite of having IC50 values in the micromolar range. In particular, compound 6f showed the most potent activity with a maximum T/C of 256% at a daily dosage of 4.0 mg/kg for four days. Furthermore, both compounds 6a and 6f were effective against Meth A sarcoma in mice and inhibited 71 and 77% of the tumor growth at 2.0 and 3.0 mg/kg dosages, respectively. In contrast to 6f, compound 6i possessing the 2-nitrophenyl carbamate moiety showed only a slight in vivo activity, while it had about one order of magnitude higher in vitro cytotoxicity than 6f. For the stereochemistry-activity relationships at the C9 position, the (9R*)-isomers of 6c, 6g, and 6j were found to show higher in vitro and in vivo potencies than the corresponding (9S*)-isomers.

journal_name

Bioorg Med Chem

journal_title

Bioorganic & medicinal chemistry

authors

Unno R,Michishita H,Inagaki H,Suzuki Y,Baba Y,Jomori T,Nishikawa T,Isobe M

doi

10.1016/s0968-0896(97)00026-6

subject

Has Abstract

pub_date

1997-05-01 00:00:00

pages

883-901

issue

5

eissn

0968-0896

issn

1464-3391

pii

S0968089697000266

journal_volume

5

pub_type

杂志文章

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