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ChemInform Abstract: Enantioselective Preparation of 2,4-Disubstituted Azetidines.

✍ Scribed by Angela Marinetti; Philippe Hubert; Jean-Pierre Genet

Publisher
John Wiley and Sons
Year
2001
Weight
33 KB
Volume
32
Category
Article
ISSN
0931-7597

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Enantioselective Preparation of 2,4-Disu
Enantioselective Preparation of 2,4-Disubstituted Azetidines
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Chiral C 2 -symmetric N-benzylazetidines have been conveniently prepared from optically pure anti-1,3-diols without loss of enantiomeric purity. N-Debenzylation led to the corresponding N-unsubstituted azetidines, which were then subjected to palladium-catalysed coupling reactions with aryl [a]

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## Preparation of New 2,4-Disubstituted Oxazoles from N-Acylaziridines. -The title reaction proceeds efficiently with aziridines, e.g. (VII), which bear electron-donating groups at the aziridine ring. Several products are obtained from aziridines of type (I), having an electron-withdrawing ester

ChemInform Abstract: Preparation of 2,5-
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Preparation of 2,5-Disubstituted 2-Thiazolines. -A new synthetic access to the title thiazolines is presented. The isothiocyanates (I) and (VI), prepared by chloroarylation of allylisothiocyanate with aryldiazonium chlorides, undergo cyclization in the presence of bases to afford the target thiazol