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Burgess Reagent的合成应用

伯吉斯试剂的合成应用

1.前言 

Burgess试剂又名伯吉斯试剂,它是以美国化学家爱德华·梅雷迪思命名得来的,伯吉斯即N-(三⼄基铵磺酰)氨基甲酸甲酯,是⼀个氨基甲酸酯类的内盐,常⽤作脱⽔剂,例如:羟基脱水制备双键;酰胺脱水制备氰基;伯醇经氨基甲酸酯制备伯胺;甲酰胺制备异氰。
Burgess试剂的制备:


将无水甲醇(19.2g0.6 mol)和无水苯40 mL的混合物、在30-40分钟内,滴入ClSO2NCO85g 52.3 mL, 0.6 mol)和无水苯200 mL的混合物中,控温10-15℃加毕,室温搅拌2小时。然后加入1000 mL无水苯稀释后,小心滴入190 mL无水三乙胺和250 mL无水苯的混合物中,控温10-15℃,约40分钟左右加完。加毕,室温搅拌2小时,析出大量固体。反应毕,过滤,固体用无水苯200 mL、无水THF200 mL洗后,滤液浓缩后,(控温<30℃),加入无水THF溶解后,重结晶得123g, 收率86%。注:整个操作温度要低于30℃

2 Burgess试剂应用综述
2.1 Burgess试剂用以杂环化合物的合成

WO2012054510 A1


WO2013017657 A1


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Organic Letters (2016), 18(3), 460-463

2.2 Burgess试剂用酰胺脱水合成腈

WO2016075239 A1

Burgess reagent (1.7 g, 7.19 mmol) is added to a solution of 6a (840 mg, 4.79 mmol) in DCM (15 mL), and the mixture is heated for 3h at 35°C. The reaction is diluted with DCM, washed with 0.2N hydrochloric acid and brine. The organic layer is separated and dried with a Phase separator cartridge and evaporated under vacuum to obtain a crude that is purified by flash chromatography (eluent 0-20% EtOAc/cyclohexane) to furnish the title compound (680 mg, 90%).

WO2011071570 A1

Journal of Medicinal Chemistry (2014), 57(6), 2357-2367

WO2013041497 A1


2.3 Burgess试剂用于羟基脱水合成烯烃

European Journal of Organic Chemistry (2018), 2018(45), 6256-6273

At room temp. (methoxycarbonylsulfamoyl)triethylammonium hydroxide inner salt (Burgess reagent, 194 mg,813 µmol, 3.0 equiv.) was added to a solution of the hydroxycyclopentanone cis-39 (121 mg, 271 µmol) in toluene (3 mL). The mixture was stirred at 100°C for 12 h and then cooled to room temp. Silica gel was added and the solvent was evaporated under reduced pressure. Purification by flash chromatography afforded compound cis-40 (113 mg, 263 µmol, 97%) as a white solid

Journal of Organic Chemistry (2016), 81(22), 11017-11034


WO2016015014 A1

To a stirring mixture of 8-(4-propylphenyl)-l,4-dioxaspiro[4.5]decan-8- ol (1.38 g, 4.99 mmol) in THF (24 mL) was added Burgess reagent (2.38 g, 9.99 mmol). The mixture was heated at 50°C for 3 h. The solvent was evaporated and the 15 reaction mixture partitioned between water (30 mL) and DCM (50 mL). Solvents were evaporated and the residue purified by column chromatographyto afford 1.21 g (93%) of 8-(4-propylphenyl)-1,4-dioxaspiro[4.5]dec-7-ene (1.21 g, 4.64 mmol, 93 % yield) as a colourless oil.

Organic & Biomolecular Chemistry (2017), 15(20), 4282-4285

The respective alcohol (200 µmol) was dissolved in 1,4-dioxane (1.0 mL). Burgess' reagent (96.0 mg, 400 µmol) was added, the reaction vial was sealed with a septum and submitted to the microwave reactor. The reaction mixture was irradiated for 1 minute with a capacity of 150 W to reach a temperature of 150 °C. The reaction was stirred for 3 minutes at this temperature and then cooled down to ambient temperature. The reaction mixture was directly subjected to silica gel flash chromatography using petroleum ether/EtOAc (using the solvent composition or gradient indicated) for purification of the crude product.

2.4 Burgess试剂用于醇的氧化

J. Org. Chem. 2017, 82, 2, 1046–1052

在本文中,我们发现,在二甲亚砜溶剂下,Burgess试剂有效且快速地促进广泛的伯醇和仲醇以优异的产率和温和的条件下氧化为其相应的醛和酮。而在其他溶剂中反应是羟基脱水。

反应机理如图

2.3 Burgess试剂用于磺酰胺的合成
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WO2003066549 A2

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