osphorane and, depending on the nature of the aglycone, hydrogenation of the dienes can lead to 2-C-methyl derivatives with (R)- or (S)-stereochemistry, which can be easily converted into isomeric chiral 2,5-dimethylvalerolactones.
烷基2-酰氧基-3-脱氧d -赤-己-2-烯
吡喃糖苷二酯转化为相应的烷基2- Ç亚甲基- 3,4- enopyranosides在与基亚甲基治疗,并根据糖苷配基的性质,二烯的氢化可以产生具有(R)-或(S)-立体
化学的2- C-甲基衍
生物,其可以容易地转化为异构的手性2,5-二甲基
戊内酯。