Synthesis of (R)-(-)- and (S)-(+)-4-fluorodeprenyl, (R)-(-)- and (S)-(+)-[N-11C-methyl]-4-fluorodeprenyl and PET studies in baboon brain
作者:Alain Plenevaux、Stephen L. Dewey、Joanna S. Fowler、Marcel Guillaume、Alfred P. Wolf
DOI:10.1021/jm00169a034
日期:1990.7
4-fluorobenzaldehyde with nitroethane followed by reduction with lithium aluminum hydride to produce racemic 4-fluoroamphetamine, which was resolved by recrystallization with L- or D-N-acetylleucine to yield (R)-(-)-4-fluoroamphetamine or (S)-(+)-4-fluoroamphetamine in greater than 96% enantiomeric excesses and in yields of 42 and 39%, respectively. Alkylation with propargyl bromide gave (R)-(-)- or (S)-(+)-4-fluoronordeprenyl
(R)-(-)-和(S)-(+)-α-甲基-β-4-(氟苯基)-N-甲基-N-丙炔基乙胺[R)-(-)-和(S)-( +)-4-氟去异戊烯基)是通过4-氟苯甲醛与硝基乙烷反应,然后用氢化铝锂还原生成外消旋的4-氟苯丙胺而合成的,通过用L-或DN-乙酰基亮氨酸重结晶来拆分,得到(R)- (-)-4-氟苯丙胺或(S)-(+)-4-氟苯丙胺的对映体过量大于96%,产率分别为42%和39%。用炔丙基溴烷基化得到(R)-(-)-或(S)-(+)-4-氟去甲异戊二烯基,其被还原甲基化(Borch条件)以产生(R)-(-)-或(S)-(+ )-4-氟戊烯基。(R)-(-)-或(S)-(+)-4-氟去异戊二烯基与碳-11标记的甲基碘烷基化得到(R)-(-)-或(S)-(+)-[N- 11 C-甲基] -4-氟去异戊烯基的放射化学产率为30-40%。对狒狒中两种标记的对映体的PET比较研究表明,相对于(R)