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Determination of the absolute stereochemistry of 15 generated by the 1-catalyzed reaction has been reported in our communication (ref 4a).
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Determination of the absolute stereochemistry of 15 generated by the 1-catalyzed reaction has been reported in our communication (ref 4a).
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To obtain the Mannich products generated from the reactions of aldehyde nucleophiles in an excellent dr, quick and careful workup and purification procedures were required. For example, the dr values of the products slightly (up to 4% variation) changed during silica gel flash column chromatography. Diastereomers of 15 were inseparable by typical silica gel flash column chromatography see Supporting Information
-
To obtain the Mannich products generated from the reactions of aldehyde nucleophiles in an excellent dr, quick and careful workup and purification procedures were required. For example, the dr values of the products slightly (up to 4% variation) changed during silica gel flash column chromatography. Diastereomers of 15 were inseparable by typical silica gel flash column chromatography (see Supporting Information).
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Determination of the absolute stereochemistry of 16 generated by the 4-catalyzed reaction has been reported in our communication (ref 4b).
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Determination of the absolute stereochemistry of 16 generated by the 4-catalyzed reaction has been reported in our communication (ref 4b).
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