Functionalized cis- and trans-fused bicyclic alpha-amino acids via stereoselective double annulation and dequaternization reactions.
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Abstract |
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Fused bicyclic alpha-amino acids can be prepared by a double Michael reaction of p-anisyl ethynyl ketone and a tethered diacid, cyclization via hydrogenation or hydration of a CN group, and oxidation of the p-anisyl group. The substitution level of the alpha-amino acids can be adjusted by decyanation or decarboethoxylation of the intermediates. Bicyclic alpha-amino acids prepared in this way include cis- and trans-perhydroisoquinoline-3-carboxylic acids and cis-perhydro-2-pyrindine-3-carboxylic acids of various substitutions and oxidation levels. The bicyclic alpha-amino acids may be regarded as functionalized and conformationally restricted analogues of proline, pipecolic acid, 2-aminoadipic acid, or glutamic acid. |
Year of Publication |
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2003
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Journal |
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The Journal of organic chemistry
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Volume |
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68
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Issue |
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4
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Number of Pages |
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1409-17
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Date Published |
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2003
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ISSN Number |
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0022-3263
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URL |
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https://dx.doi.org/10.1021/jo026643+
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DOI |
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10.1021/jo026643+
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Short Title |
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J Org Chem
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