504-72-3Relevant articles and documents
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King
, p. 432 (1942)
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Novel process
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, (2008/06/13)
A process for the preparation of a 4-aryl-3-oxymethyl-piperidine of structure (1) in which R is hydrogen or an alkyl, arylalkyl, allyl, acyl, carbonyloxyalkyl, carbonyloxyaryl, or carbonyloxyalkylaryl group, and Y is a hydrogen atom or an optionally substituted alkyl, arylalkyl, or aryl group, from a carboxy derivative of structure (2) where A is oxygen or sulphar, X is one or more of hydrogen, or a readily reducible group, Z represents either a hydrogen atom or an OY′ group in which Y′ is independently selected from the same groups as Y, and the broken line circle indicates bonding, appropriate to a tetrahydropyridine, dihydropyridine, pyridine, or piperidine ring said process comprising (a) when Y is a hydrogen atom, reducing the compound of structure (2), or (b) when Y is other than a hydrogen atom (i) forming an ether from the alcohol product of step (a), (ii) etherifying the aldehyde compound of structure (2) in which Z is hydrogen, or (iii) reducing the ester compound of structure (2) in which Z is OY′.
3-substitutes isoxazolidines as chiral auxiliary agents
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, (2008/06/13)
Disclosed are compounds of the formula: where R is selected from the group consisting of C1-C4 linear or branched alkyl, trifluoromethyl, halo, phenyl, biphenyl and naphthyl, wherein the aromatic group can be substituted with C1-C4 linear or branched alkyl, trifluoromethyl, or halo; and wherein the asterisked 3-position ring carbon is either in (R) or (S) configuration, or racemate form, and salts thereof formula I. The compounds are useful in chiral synthesis, for example, producing naturally occurring L-amino acids, e.g., alanine, from aliphatic acid precursors.
