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光学活性アミノ酸を利用した革新的分子変換


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Title: 光学活性アミノ酸を利用した革新的分子変換
Other Titles: Innovative Molecular Transformations Using Optically Active a-Amino Acids
Authors: 尾野村, 治
Authors (alternative): Onomura, Osamu
Issue Date: Nov-2002
Publisher: 日本薬学会
Citation: YAKUGAKU ZASSHI v.122(11) p.983-987, 2002
Abstract: Some methods for innovative molecular transformations using optically active α-amino acids have been exploited. 1) The non-Kolbe reaction of the N-benzoyloxazoline derivative 1 derived from L-serine gave the optically active N,O-acetal 2 when graphite was used an anode material. This reaction represents the first example of “memory of chirality” in the carbenium ion chemistry. 2) The optically active pipecolic acid derivative 13, prepared from L-lysine by using electrochemical oxidation, was cyclopropanated with high diastereoselectivity (96.6%de), and the product 14 was transformed into (2S,3R)-metanopipecolic acid (7). 3) An enantiomerically pure 1,2-dihydropyridine 23 was prepared from L-lysine using electrochemical oxidation as a key step and was utilized as a chiral diene synthon in the Diels-Alder reaction. That is, in the presence of AlCl3, the Diels-Alder reaction between 23 and N-acryloyloxazolidinone 24 gave a cycloadduct with high stereoselectivity, which was converted to an optically active isoquinuclidine derivative 26 (96.8%ee). 4) The Hofmann rearrangement of the L-glutamine derivative 27 to the enantiomerically pure 2-aminobutyric acid derivative 28 was successfully achieved with an electrochemical method using a trifluoroethanol-MeCN solvent system. 5) Some types of N-formyl cyclic amine derivatives were found to be effective activators of trichlorosilane to reduce ketones and imines. Namely, the reduction of ketones and imines by trichlorosilane with a catalytic amount of L-proline derivatives 30 and 32 gave enantiomerically enriched sec-alcohols and amines, respectively, to some extent of optical yields.
Keywords: α-amino acid / asymmetric synthesis / optically active / memory of chirality / trichlorosilane / catalytic activation
URI: http://hdl.handle.net/10069/8412
ISSN: 00316903
DOI: 10.1248/yakushi.122.983
PubMed ID: 12440155
Relational Links: http://dx.doi.org/10.1248/yakushi.122.983
Type: Journal Article
Text Version: publisher
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/8412

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