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ACS Applied Materials & Interfaces

ACS Applied Materials & Interfaces

IF: 8.3
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Flow and On-Water Synthesis and Cancer Cell Cytotoxicity of Caffeic Acid Phenethyl Amide (CAPA) Derivatives

Published:24 July 2024 DOI: 10.3390/ijms25158051
Anthony Saucedo, M. Subbarao, M. Jemal, Nakya Mesa-Diaz, Jadyn L. Smith, Alexandra Vernaza, Liqin Du, Sean M. Kerwin

Abstract

Caffeic acid phenethyl ester (CAPE) is a phenolic natural product with a wide range of biological activities, including anticancer activity; however, the ester group of CAPE is metabolically labile. The corresponding amide, CAPA, has improved metabolic stability but limited anticancer activity relative to CAPE. We report the synthesis using flow and on-water Wittig reaction approaches of five previously reported and five novel CAPA analogues. All of these analogues lack the reactive catechol functionality of CAPA and CAPE. Cytotoxicity studies of CAPE, CAPA, and these CAPA analogues in HeLa and BE(2)-C cells were carried out. Surprisingly, we found that CAPA is cytotoxic against the neuroblastoma BE(2)-C cell line (IC50 = 12 μM), in contrast to the weak activity of CAPA against HeLa cells (IC50 = 112 μM), and the literature reports of the absence of activity for CAPA against a variety of other cancer cell lines. One novel CAPA analogue, 3f, was identified as having cytotoxic activity similar to CAPE in HeLa cells (IC50 = 63 μM for 3f vs. 32 μM for CAPE), albeit with lower activity against BE(2)-C cells (IC50 = 91 μM) than CAPA. A different CAPA analogue, 3g, was found to have similar effects against BE(2)-C cells (IC50 = 92 μM). These results show that CAPA is uniquely active against neuroblastoma cells and that specific CAPA analogues that are predicted to be more metabolically stable than CAPE can reproduce CAPA’s activity against neuroblastoma cells and CAPE’s activity against HeLa cells.

Substances (4)

Materials
Procduct Name CAS Molecular Formula Supplier Price
2-PropenaMide, 3-(3,4-dihydroxyphenyl)-N-(2-phenylethyl)- 105955-01-9 C17H17NO3 16 suppliers Inquiry
2-PropenaMide, 3-(3,4-dihydroxyphenyl)-N-(2-phenylethyl)- 105955-01-9 C17H17NO3 16 suppliers Inquiry
2-PropenaMide, 3-(3,4-dihydroxyphenyl)-N-(2-phenylethyl)- 105955-01-9 C17H17NO3 16 suppliers Inquiry
2-PropenaMide, 3-(3,4-dihydroxyphenyl)-N-(2-phenylethyl)- 105955-01-9 C17H17NO3 16 suppliers Inquiry

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