AbstractBulbocapnine methyl ether (2), on treatment with boron halides, affords the aporphine‐1,2‐diol (3), the novel aporphines 5 and 6 or the phenanthrene derivative 11 depending on the reaction conditions. 3 can be further transformed into corydine methyl ether (4); 6 has been converted to corytuberine (8). Similarly, dehydrobulbocapnine methyl ether 9 was converted to 10.
Selective Ether Cleavage in the Aporphine Series. Conversion of (S)-Bulbocapnine into (S)-Corytuberine and (S)-Corydine Methyl Ether
作者:Max Gerecke、Ren� Borer、Arnold Brossi
DOI:10.1002/hlca.19760590731
日期:1976.11.3
AbstractBulbocapnine methyl ether (2), on treatment with boron halides, affords the aporphine‐1,2‐diol (3), the novel aporphines 5 and 6 or the phenanthrene derivative 11 depending on the reaction conditions. 3 can be further transformed into corydine methyl ether (4); 6 has been converted to corytuberine (8). Similarly, dehydrobulbocapnine methyl ether 9 was converted to 10.
Über die Oxydation des O-Methylbulbocapnins mit Jod
作者:Max Gerecke、René Borer、Arnold Brossi
DOI:10.1002/hlca.19750580124
日期:——
The oxidation product obtained by treatment of bulbocapnine methyl ether (2a) with iodine in ethanol/water is not the tetradehydroaporphinium salt 4 as assigned by Gadamer & Kuntze, but a dimer of structure 3. Reduction of 3 with zinc in dilute sulfuric acid gives rac-bulbocapnine methyl ether, whereas reduction with complex hydrides affords the diastereomeric dimers 7a and 7b.