Jn. Tawara et al., 4-hydroxylated piperidines and N-methyleuphococcinine (1-methyl-3-granatanone) from Picea (spruce) species. Identification and synthesis, J NAT PROD, 62(2), 1999, pp. 321-323
Three trace alkaloids from Colorado blue spruce, Picea pungens, were identi
fied by synthesis and GCMS comparisons as 4 alpha-hydroxy-cis-2-methyl-6-(2
-oxopropyl)piperidine (1),4 alpha-hydroxy-cis-2-methyl-6-propylpiperidine (
11), and 1-methylgranatanone (15) (N-methyl-9-aza-1-methylbicyclo[3.3.1]non
ane or N-methyleuphococcinine). Alkaloids 1 and 11 are the first among nume
rous known pine and spruce piperidines to contain a ring-oxygenated substit
uent.