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2005
Oxazine derivatives
R 0595
Synthesis of 2,6-Disubstituted Morpholines Through Regioselective Oxiranes
Opening by Tosylamide under PTC Conditions. — Under optimized condi14- 166 Ring
tions for each reaction step, symmetric and unsymmetric morpholines are prepared via
diol intermediates. The latter are obtained either in one step or two steps depending on
the type of target compounds. The process is followed by cyclization to give N-tosyl
morpholines, and final deprotection (to be continued). — (LUPI*, V.; ALBANESE,
D.; LANDINI, D.; SCALETTI, D.; PENSO, M.; Tetrahedron 60 (2004) 51, 11709-pp;
Dip. Chim. Org. Ind., Univ. Stud. Milano, CNR, I-20133 Milano, Italy; Eng.) —
Klein
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