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2005
Enantioselective syntheses
O 0031
Catalytic Dissymmetrization of meso-2-Imidazolidinones: Alternative Route to
Synthons for 1,2-Diamines. — Different types of diacetylated meso-sub15- 031 Chiral
strates are prepared and subjected to the optimized conditions A) which cause a highly
enantioselective monodeacetylation. The products can serve as suitable precursors of
optically active 1,2-diamines as is demonstrated for the preparation of both enantiomers
(XIII) from the common intermediate (IIb). — (ISHIZUKA*, T.; KATAHIRA, T.;
SEO, R.; MATSUNAGA, H.; KUNIEDA, T.; Tetrahedron Lett. 45 (2004) 51,
9327-9330; Grad. Sch. Pharm. Sci., Kumamoto Univ., Oehon, Kumamoto 862, Japan;
Eng.) — Lindner
2005
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