Mb. Berry et al., 5-ENDO-TRIG CYCLIZATIONS IN HETEROCYCLE SYNTHESIS - ENANTIOSPECIFIC SYNTHESIS OF (-MONOMORINE-I()), Chemical communications, (22), 1997, pp. 2141-2142
The indolizidine alkaloid monomorine I is synthesised from D-norleucin
ol using 5-endo-trig cyclisation and intramolecular reductive aminatio
n as the key ring-forming steps.