VII. Physico-chemical study of models of indole alkaloids confirmation of the assignment of the geometry of the two isomeric 3-ethylidene-1-azabicyclo [2,2,2] octane by the study of the nuclear overhauser effect (NOE).

Isolation and identification of contaminants found in commercial dihydroquinine

“…The formation of these isoquinines during the hydrogenation of quinine with Pd-C resulted from a catalytic isomerization of the -n (quinine) to [3][4][5][6][7][8][9][10] (a,(3-isoquinine). Once formed, these isoquinines cannot be reduced to dihydroquinine under the conditions normally employed for the commercial preparation of the latter compound..…”

Steric deshielding in nonrigid systems. II. Preparation and NMR spectra of the hexachlorocyclopentadiene adducts of 1,3-alkadienes

“…Group Dipole Effect.-The observation that in 1alkenes Htrans is shielded with respect to Hcis (see 21) has been attributed to the presence of a permanent dipole as drawn. 22 The effect is small, however, causing a chemical shift difference of <0.1 ppm for R = Me, Et, or nBu in 21.…”