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The absolute and relative stereochemistry of compounds 2 was determined by X-ray crystallography of a related derivative (see Supporting Information) and additional assignments made by analogy.
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The absolute and relative stereochemistry of compounds 2 was determined by X-ray crystallography of a related derivative (see Supporting Information) and additional assignments made by analogy.
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58
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Increasing the loading of the base at the beginning of the reaction (e.g., 120 mol %) resulted in <100% conversion with an effective stalling of the process.
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Increasing the loading of the base at the beginning of the reaction (e.g., 120 mol %) resulted in <100% conversion with an effective stalling of the process.
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59
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The two side products observed in these reactions are; mainly (E)-isopropyl 3-aryl-acrylate (see ref (14)), and the γ-lactone (1,2-addition).
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The absolute and relative stereochemistry of compound 14 was determined by X-ray crystallography of a related derivative (see Supporting Information).
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