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2004
Alkaloids
U 0600
51- 176
Highly Diastereoselective Approach Toward (±)-Tetraponerine T6 and Analogues
via the Double Cycloisomerization—Reduction of Bis-alkynylpyrimidines. —
Tetraponerine T6 (IIIa) and its tri- and tetrasubstituted analogues (IIIb) and (IIIc) are
derived by generation of the tricyclic core (II) of these alkaloids, followed by highly
diastereoselective hydrogenation in acidic media and further reduction of the resulting
amidinium derivatives by LiAlH4. — (KIM, J. T.; BUTT, J.; GEVORGYAN*, V.; J.
Org. Chem. 69 (2004) 17, 5638-5645; Dep. Chem., Univ. Ill., Chicago, IL 60607,
USA; Eng.) — Klein
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