Synthesis of carbamate derivatives of iejimalides. Retention of normal antiproliferative activity and localization of binding in cancer cells
摘要:
The syntheses of six iejimalide carbamate derivatives are described. Their biological activity and those of the unmodified iejimalides A and B against breast and prostate cancer cell lines were determined. These results show that the serine hydroxyl group of iejimalides A and B is a permissive site that can be functionalized to form carbamate derivatives without significant loss of normal biological activity. This method of derivatization will be valuable for cellular target identification, mechanism of action studies, and drug development efforts. A fluorescent derivative does not exhibit binding to the cytoskeletal features of cancer cells. (c) 2007 Elsevier Ltd. All rights reserved.
Synthesis of carbamate derivatives of iejimalides. Retention of normal antiproliferative activity and localization of binding in cancer cells
摘要:
The syntheses of six iejimalide carbamate derivatives are described. Their biological activity and those of the unmodified iejimalides A and B against breast and prostate cancer cell lines were determined. These results show that the serine hydroxyl group of iejimalides A and B is a permissive site that can be functionalized to form carbamate derivatives without significant loss of normal biological activity. This method of derivatization will be valuable for cellular target identification, mechanism of action studies, and drug development efforts. A fluorescent derivative does not exhibit binding to the cytoskeletal features of cancer cells. (c) 2007 Elsevier Ltd. All rights reserved.
Copper-Catalyzed/Promoted Cross-coupling of <i>gem</i>-Diborylalkanes with Nonactivated Primary Alkyl Halides: An Alternative Route to Alkylboronic Esters
作者:Zhen-Qi Zhang、Chu-Ting Yang、Lu-Jun Liang、Bin Xiao、Xi Lu、Jing-Hui Liu、Yan-Yan Sun、Todd B. Marder、Yao Fu
DOI:10.1021/ol503111h
日期:2014.12.19
The first copper-catalyzed/promoted sp(3)-C SuzukiMiyaura coupling reaction of gem-diborylalkanes with nonactivated electrophilic reagents is reported. Not only 1, 1-diborylalkanes but also some other gem-diborylalkanes can be coupled with nonactivated primary alkyl halides, offering a new method for sp(3)Csp(3)C bond formation and, simultaneously, providing a new strategy for the synthesis of alkylboronic esters.