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Synthesis 2011(14): 2310-2320
DOI: 10.1055/s-0030-1260064
DOI: 10.1055/s-0030-1260064
PAPER
© Georg Thieme Verlag
Stuttgart ˙ New York
Chemodivergent Synthesis of 7-Aryl/alkyl-6-hydroxy-1,4-oxazepan-5-ones and 2-[Aryl/alkyl(hydroxy)methyl]morpholin-3-ones from a Common Epoxyamide Precursor
Further Information
Received
14 January 2011
Publication Date:
09 June 2011 (online)
Publication History
Publication Date:
09 June 2011 (online)
Abstract
We present here a regiospecific synthesis of 7-alkyl- or 7-aryl-6-hydroxy-1,4-oxazepan-5-ones and 2-[aryl(hydroxy)methyl]- or 2-(1-hydroxyalkyl)morpholin-3-ones from a diastereomeric mixture of trans-3-alkyl- or -3-aryl-N-(2-hydroxyethyl)-N-(1-phenylethyl)oxirane-2-carboxamides. This chemodivergent synthesis is easily controlled by an appropriate choice of cyclization reaction conditions.
Key words
chemoselectivity - cyclization - alkoxide - oxazepan-5-ones - morpholin-3-ones
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References
When sodium was changed to lithium, the corresponding morpholin-3-one was obtained; however, prolonged reaction times were required.