1. A remarkable influence of the electrolyte in anodic cyclization of 1-benzyltetrahydroisoquinolins to neospirodienones or morphinandienones
Helmut Klünenberg, Cornelia Schäffer and Hans-J. Schäfer
Tetrahedron Letters
Volume 23, Issue 44, 1982, Pages 4581-4584
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http://dx.doi.org/10.1016/S0040-4039(00)85659-2Helvetica Chimica Acta
Volume 63, Issue 4, Date: 6 June 1980, Pages: 938-961
Marc-André Siegfried, Hans Hilpert, Max Rey, Adré S. Dreiding
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http://dx.doi.org/10.1002/hlca.19800630423