Pheromones of insects and their analogs. XX. Methyl-branched pheromones based on 4-methyltetrahydropyran.
作者:V. N. Odinokov、G. Yu. Izhmuratov、R. Ya. Kharisov、A. G. Ibragimov、R. M. Sultanov、U. M. Dzhemilev、G. A. Tolstikov
DOI:10.1007/bf00598420
日期:——
corresponding Grignard reagent with allyl bromide (THF, CuI-bi-2-pyridyl, 2°C, 4 h, Ar). The interaction of 1.42 g of (V) with Et3Al (hexane, 20°C, Cp2ZrCl2, Ar) gave 3,7-dimethylnonan-1-ol (VI), boiling which with 48% HBr in the presence of concentrated H2SO4 gave 1-bromo-3,7-dimethylnonane (VII) which was then converted into the desired (VIII) by the reaction of the corresponding Grignard reagent with DMFA
建议合成 4,8-二甲基癸醛 (VIII) — 一种面粉甲虫 Tribolium confusum 和 T 的信息素。栗。通过加热 71.2 g 4-甲基四氢吡喃 (I)、83.2 g AcBr 和 1.57 g ZnCl2 (45°C),然后在 120°C,2 小时),1-乙酰氧基-5-溴-3-甲基戊烷 (II)获得了。19.8 g (II) (MeOH-H2O, TsOH, 20°C, 15 h) 水解得到 5-bromo-3-methylpentan-1-ol (III)。从 18.1 g (III) 和 38.9 ml 2,3-二氢吡喃 (Et2O, TsOH, 20°C, 20 h) 得到 (III), (IV) 的 2-THPL 酯,将其转化为 3-通过用烯丙基溴(THF,CuI-bi-2-吡啶基,2°C,4小时,Ar)处理相应的格氏试剂来制备methyloct-7-en-1-ol