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We report the synthesis of seven new sanguinamide B (SanB) analogues. Substitution of amino acids along the backbone of SanB and testing in HCT-116 colon cancer cell lines identified new biologically active SanB derivatives. These compounds establish a structure–activity relationship and show that a Cbz-lysine moiety is important for biological activity. We also identified the most effective stereochemistry...
We performed X-ray structural analyses of the five- and six-layered [3.3]metacyclophanes (MCPs) 1 and 2 and the six-layered [3.3]MCP tetraone 3. In the solid state, the MCP moieties of 1, 2, and 3 adopt different conformations from those of the free MCPs in solution. In the five-layered [3.3]MCP 1, all the [3.3]MCP moieties adopt anti (chair/boat) conformations. In the six-layered [3.3]MCP 2, two...
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