Tetrahedron Letters p. 3025 - 3028 (1992)
Update date:2022-07-30
Topics:
Brandaenge, Svante
Leijonmarck, Hans
Intramolecular Claisen-type condensation of amide 1 or imide 7 leads to the same δ-lactone in racemic (2) or enantiomerically pure form (4) respectively.A side-reaction producing the 11-membered ring compound 6 makes imide 3 unsuitable as a starting material for the synthesis of 4.A clean two-step reduction of 4 to 9 is also described.
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Doi:10.1134/S1070363213020187
(2013)Doi:10.1021/jm00095a028
(1992)Doi:10.1021/ja401606e
(2013)Doi:10.1016/j.tet.2013.02.035
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