Die Synthese der Titelverbindung (XIII) wird ausgehend von den Komponenten (III) [seinerseits zugänglich ausgehend vom Acetylenalkohol (Ia)] und (IV) sukzessiv über die angegebenen Stufen mit einer Ausb. von 6.5% über alle Stufen durchgeführt.
In the presence of a catalytic amount of 2-cyclohexen-1-one, decarboxylation of α-amino acids proceeds smoothly and affords the corresponding amino compounds in good yields. Optically active amino compounds, (3R)-(−)-3-hydroxypyrrolidine and (2R)-(−)-2-hydroxypropylamine are obtained in 93% and 80% yields, respectively.
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