Reactions of N-methoxycarbonyl-2-alkylpyridinium salts with alkynyl Grignard reagents give exclusively 2,6-disubstituted 1,2-dihydropyridines, from which cis- and trans-2,6-dialkylated piperidines can be derived selectively. Consequently, (±)-solenopsine A is efficiently synthesized by this sequence.
通过 N-甲氧基羰基-2-烷基
吡啶鎓盐与炔基
格氏试剂的反应,可以得到 2,6-二取代的 1,2-
二氢吡啶,并从中选择性地衍生出顺式和反式 2,6-二烷基
哌啶。因此,(±)-solenopsine A 可以通过这种方法高效合成。