Über die stereospezifische Hydroxylierung von (+)-Spartein (Pachycarpin) bei der Ratte
作者:Thomas Ebner、Michel Eichelbaum、Peter Fischer、Claus O. Meese
DOI:10.1002/ardp.19893220704
日期:——
Pachycarpin (4), der optische Antipode des Lupinenalkaloids (−)‐Spartein (1), wurde aus (−)‐Lupanin synthetisiert und sein Metabolismus in der Ratte untersucht. Als Urinhauptmetabolit konnte nach chromatographischer Reinigung stereochemisch einheitliches (+)‐(4S)‐Hydroxyspartein (7) durch Massenspektrometrieund Hochfeld‐NMR‐Spektroskopie identifiziert werden.
Method for synthesising an unsaturated macrocyclic ketone
申请人:Symrise AG
公开号:US11021426B2
公开(公告)日:2021-06-01
A method for producing unsaturated macrocyclic monoketones comprising the following steps: (a) preparing macrocyclic dienes with a ring size of at least 9 carbon atoms; (b) contacting the starting materials from step (a) with (b1) a palladium(II) salt and/or a palladium(II) complex; and (b2) an oxidant; and (b3) a solvent; and optionally (b4) a ligand; and optionally (b5) a co-catalyst; and optionally (b6) an acid.
Robins, David J.; Sheldrake, Gary N., Journal of Chemical Research, Miniprint, 1987, # 8, p. 2101 - 2120
作者:Robins, David J.、Sheldrake, Gary N.
DOI:——
日期:——
New quinolizidine alkaloids from Lupinus argenteus and its hosted root parasite Castilleja sulphurea. Stereochemistry and conformation of some naturally occurring cyclic carbinolamides
作者:Robert L. Arslanian、Guy H. Harris、Frank R. Stermitz
DOI:10.1021/jo00291a019
日期:1990.2
Solid-State Structural Investigation of an Organolithium (−)-Sparteine Complex:η3-N-Boc-N-(p-methoxyphenyl)-3-phenylallyllithium⋅(−)-Sparteine
作者:Daniel J. Pippel、Gerald A. Weisenburger、Scott R. Wilson、Peter Beak
A η3 monomeric alkyllithium⋅(-)-sparteine complex has been isolated and characterized in the solid state (see picture). Determination of the absolute configuration of this key intermediate in asymmetric metalation/substitution sequences of N-tert-butoxycarbonyl-N-(p-methoxyphenyl)cinnamylamine allows definitive assignment of the stereochemical course of its electrophile-dependent substitution reactions.