Synthesis of (�)-trans-2,5-Dialkylpyrrolidines from theLukes-?orm Dilactam: Efficient Preparation of (�)-trans-2-Butyl-5-heptylpyrrolidine and Analogs Present in Ant Venoms
作者:Wieslaw Gessner、Kimio Takahashi、Arnold Brossi、Marek Kowalski、Michael A. Kaliner
DOI:10.1002/hlca.19870700805
日期:1987.12.16
A 7-step synthesis of (±)-trans-2-butyl-5-heptylpyrrolidine (14) from the Lukes-Šorm dilactam 1 was accomplished in 6% overall yield without counting for a reconversion of cis-isomer 13 into trans-isomer 14 which was also accomplished. Reduction of pyrroline 12, the precursor of 14, with NaBH4 afforded a 1:1 mixture of cis-isomer 13 and trans-isomer 14 separated by chromatography. Reductive N-methylation
的(±)A 7步合成-反式-2-丁基-5- heptylpyrrolidine(14从)卢克什-SORM双内酰胺1在6%的总收率完成而不计数为一个再变换的顺式-异构体13为反式-异构体14也完成了。用NaBH 4还原14的前体吡咯啉12,得到通过色谱法分离的1:1的顺式异构体13和反式异构体14混合物。14的还原性N-甲基化得到另一种蚂蚁生物碱N-甲基类似物15。合成途径14延长到类似物的类似合成23 - 25和代表用于合成反式-2,5- diakyl取代的吡咯烷。报道了筛选几种对血管通透性有影响的化合物的结果。