Tetrahedron p. 11643 - 11656 (1996)
Update date:2022-08-04
Topics:
Franz, Andreas
Eschler, Pierre-Yves
Tharin, Manuel
Neier, Reinhard
The preparation of N-butadienyl-N-alkylketene N,O-tert-butyldimethylsilyl acetals (11a-d) from readily available starting materials is described. The cascade Diels-Alder reaction followed by acylation of these ketene acetals yields bicyclic and tricyclic products 7, 13a,b and 14c,d with high diastereoselectivity.
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