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Ritter reaction on terpenoids. III. Stereospecific preparation of bicyclic [3.3.1] substituted piperidines

✍ Scribed by W.N. Samaniego; A. Baldessari; M.A. Ponce; J.B. Rodriguez; E.G. Gros; J.A. Caram; C.M. Marschoff

Book ID: 103408007
Publisher: Elsevier Science
Year: 1994
Tongue: French
Weight: 243 KB
Volume: 35
Category: Article
ISSN: 0040-4039
DOI: 10.1016/0040-4039(94)88200-2

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## Abstract 1,2,3,4‐Tetrahydrodibenzofuran‐1‐ones were obtained by __Michael__ addition of 1,3‐cyclohexadione (**2**) to __o__‐benzoquinone (**3**) and to __p__‐benzoquinones **8** and **11** (__Scheme 2__). In addition to the expected 7,8‐disubstituted adduct **14**, the ZnCl~2~‐catalyzed reaction