... Tetrahedron: Asymmetry. Volume 15, Issue 7, 5 April 2004, Pages 1145–1149. ... of 8. This process was sluggish with Pd on carbon (200 psi H 2 ) in EtOH, but could be accomplished with EtOH/AcOH (10:1) to give the tetrahydroquinoline alkaloid (−)-galipeine 1 {[α] 15 D =−26.1, (c ...