期刊
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
卷 30, 期 22, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmcl.2020.127544
关键词
[4+2] Cycloaddition reaction; Pyrimidinone; Indole; Molecular hybridization; Pancreatic cancer
资金
- National Research Foundation (NRF) South Africa [121276, 110887]
- Organic Synthesis Shared Resource of Penn State Cancer Institute
- Department of Pharmacology, Penn State College of Medicine
New indole-tethered [1,3,4]thiadiazolo[3,2-a]pyrimidin-5-one (8a -j) and [1,3,4]oxadiazolo[3,2-a]pyrimidin-5one hybrids (9a-e) were synthesized using [4+2] cycloaddition reactions of functionalized 1,3-diazabuta-1,3dienes with indole-ketenes. All molecular hybrids were structurally characterized by spectroscopic techniques (IR, NMR, and HRMS) and screened for their anti-pancreatic cancer activity in vitro. The [1,3,4]oxadiazolo[3,2a]pyrimidin-5-one hybrids (9a-e) showed stronger anti-pancreatic cancer activity than the [1,3,4]thiadiazolo [3,2-a]pyrimidin-5-one hybrids (8a-j) against the PANC-1 cell line. Compound 9d bearing an ortho-chlorophenyl moiety emerged as the most potent anti-pancreatic cancer agent with an IC50 value of 7.7 +/- 0.4 mu M, much superior to the standard drug Gemcitabine (IC50 > 500 mu M). The discovery of these [1,3,4]thiadiazolo and [1,3,4]oxadiazolo[3,2-a]pyrimidin-5-one hybrids elicits their potentials as pursuable candidates for pancreatic cancer chemotherapy.
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