Tetrahedron Letters p. 3679 - 3682 (1995)
Update date:2022-08-29
Topics:
Mulzer, Johann
Pointner, Andreas
Strasser, Rupert
Hoyer, Karsten
On treatment with MgBr2 the β-spirolactones 7 and 10 undergo ring enlargement to the γ-lactones 8 and 11, whereas the β-spirolactones 13 show diastereoselective β-elimination to form the β,γ-unsaturated acids 14.The lewis acid influence on the migratory aptitude of Me versus H is studied for β-lactone 18.
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