Ge. Boswell et al., SYNTHESIS, STEREOCHEMISTRY AND ANTI-TETRABENAZINE ACTIVITY OF BICYCLOANALOGS OF 2-PHENYLMORPHOLINES, Journal of heterocyclic chemistry, 34(6), 1997, pp. 1813-1820
A series of bicycle analogues of several 2-phenylmorpholines were synt
hesized and tested for anti-tetrabenazine activity in mice. Most of th
e target compounds were prepared by reaction of 2-bromopropiophenone (
22) with the appropriate amino alcohol to form 2-phenylmorpholinols. R
eduction of the 2-phenylmorpholinols with sodium borohydride gave amin
o diols, which were cyclized to morpholines with acid. Alternatively,
oxazines 17 and 18 were synthesized by alkylation of phenyl-(2-pyrrolo
)carbinol (32a) and phenyl-(2-piperidyl)carbinol (32b) with 2-bromoeth
anol, followed by cyclization of the resulting amino diols with acid.
Only the spirocyclic compounds 8 and 9 had i.p. anti-tetrabenazine act
ivity comparable to the non-cyclic compounds 2a-3b, but 8 and 9 were l
ess active by the oral route of administration.