✦ LIBER ✦

Acetylation of Benzylisoquinolines

✍ Scribed by W. Wiegrebe

Publisher: John Wiley and Sons
Year: 1966
Tongue: English
Weight: 114 KB
Volume: 5
Category: Article
ISSN: 0044-8249
DOI: 10.1002/anie.196606131

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✦ Synopsis

not always quantitative, and steric hindrance can also occur. In the best cases the number of polystyrene chains linked t o each other is equal to the functionality of the deactivator.

A different method of preparing star-shaped molecules has been developed in the authors' laboratory: Divinylbenzene is treated with monofunctional "living" polystyrene and block-copolymerized. It is known that polymerization of divinylbenzene leads to a cross-linked insoluble polymer. However, in the present case the polymer remains completely soluble, provided that the amount of bifunctional monomer

Acetylation of Benzylisoquinolines

W . Wiegrehe, Brunsw ick (Germany )

According to ArceIll, the reaction of the I-benzylisoquinoline alkaloid papaverine ( I ) with acetic anhydyide and sulfuric acid that affords the berbine derivative "coralyn" (2) can l x

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