Structure of argentamine
ConclusionsOn the basis of chemical transformations and the UV, IR, and mass spectra of argentamine, isolated from the epigeal part ofAmmodendron argenteum O. Ktze, the structure of (—)-13-hydroxythermopsine has been proposed as the the most probable one for it. It has been shown that argentamine and baptifoline are epimeric at C11.
Schlüsselbruchstücke in den Massenspektren von Alkaloiden, 6. Mitt.: Hydroxy-derivate des Sparteins
Der massenspektrometrische Abbau von Hydroxyderivaten des Sparteins ist in vielen Fallen sehr stark von der Stellung der funktionellen Gruppe abhangig, so das auf Grund der Massenspektren dieser Verbindungen die Lokalisierung des Substituenten in einem bestimmten Molekulteil moglich ist.
Catalytic removal of tert-butyldimethylsilyl (TBS) ether by PVP-I
Abstract A mild, efficient and rapid protocol the deprotection of alcoholic TBDMS ethers using PVP-1 as catalyst in methanol, the procedure of deprotection of various TBDMS ethers were found to be very convenient, easy work-up, high yielding.