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The quettamines: a new class of isoquinoline alkaloids

✍ Scribed by Musa H. Abu Zarga; Ghulam A. Miana; Maurice Shamma

Publisher
Elsevier Science
Year
1981
Tongue
French
Weight
281 KB
Volume
22
Category
Article
ISSN
0040-4039

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✦ Synopsis

Three quettamine type alkaloids, which incorporate either a benaoftumz or a dihydrobenzofuran moiety within the molecular frommrk, have been obtained frwrl Berberis baluchistanica. These are dihydrosecoquettamine (L), secoquettomine (21, and quettamine chloride (g). Alkaloid8 1. and 2 are racemates. Hoplann degradation of quettamine 131 provides eecoquettwnine 121 and the styrene 2 which has a trans relationship bekJeen the hydrogens at C-l and C-a, thus indicating the identical stereochemistry in quettwnine. h?mie reduction of quettamine leads to dihydroaecoquettomine Cl) and the stilbene 2. Two other polar alkaloid8 in the plant are I+)-amnepavine

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