Ph. Boyle et al., IPHENYLMETHYL)-1,5,7-TRIAZABICYCLO[4,4,0]DEC-5-ENE - A HINDERED, CHIRAL, BICYCLIC GUANIDINE BASE WITH EFFECTIVE C-2-SYMMETRY, Journal of the Chemical Society, Chemical Communications, (16), 1994, pp. 1875-1876
The title compound 5 is prepared from L-methionine and investigated by
computational, NMR spectroscopic and other techniques; the results in
dicate that the N/NH groups of 5 and its conjugate acid occupy hindere
d, chiral environments due to the disposition of the bulky diphenylmet
hyl substituents.