化学合成。
化学合成
合成路线 1(1. 合成:31608-22-7)
产率:93%
合成条件:With toluene-4-sulfonic acid In diethyl ether at 0 - 20℃; for 3 h;
实验步骤:为了回流THF,在3.50小时内滴加(0.5L)48%HBr(358g,3.9mol)。将反应物再回流1.5小时,然后冷却,用[NAHCO 3]中和,用水分配,用盐水洗涤,并用[MGSO 4]干燥。得到1g,为无色液体。然后,通过注射器将二氢吡喃(31mL,339mmol)加入到冷却的[(0XB0; C)4-BROMOBUTANOL](40g,261mmol)在200mL含有90mg [OFP-TOLUENESULFONIC]的无水醚中的溶液中。酸。在[0XB; C]下1小时和在室温下2小时后,将反应混合物用饱和碳酸氢钠溶液[(2×80)mL)和盐水(1×80mL)洗涤。有机层用无水[MGSO 4]干燥。过滤溶液,真空除去溶剂,得到57.4g(93%)产物,为无色油状物。标题化合物可如Grieco,P.A.,Larsen,S.D.,J。[ORG。 CHEM,] 51,3553-3555(1986)。 [NMR LH(CDCl 3)]:1.50-1。 65(m,4H),1.65-1。 90(m,4H),1.90-2。 10(m,2H),3.40-3.60(m,4H),3.75-3。 90(m,2H),4.55-4。 58(m,1H)。
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合成路线 2(2. 合成:31608-22-7)
产率:80%
合成条件:With 1H-imidazole; bromine; triphenylphosphine In toluene at 0 - 20℃; for 3 h; Inert atmosphere; Large scale
实验步骤:在10升反应器中,加入640g SLP-6,5升甲苯,1.0kg三苯基膦和320g咪唑,搅拌混合物直至溶解完全。 在氮气氛下,在温度降至0度后,分批加入570g液体。 控制溴使反应温度不超过10度; 加完后,将反应物温热至室温3小时直至反应结束。加入3升水并搅拌静置。有机相用无水硫酸钠干燥,过滤并浓缩,得到 原油产品; 粗产物用乙酸乙酯/石油醚柱色谱纯化,得到697g SLP-7b(X = Br),为浅黄色油状物。产率:80%.H NMR(400MHz,CDCl3):δ4.57(m, 1H),3.93-3.78(m,2H),3.52-3.40(m,2H),3.22(t,2H),1.93-1.50(m,10H)ESI / MS +(m / z):237
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