반응 #555195

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tert-butyl 1-(5-chloropentyl)-1-cyclopropanecarboxylate

NaI

→

tert-butyl 1-(5-iodopentyl)-1-cyclopropanecarboxylate

수율 99.0%

용매

heptane

2-butanone

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후처리

1. 1
   온도under reflux for 24 h
2. 2
   여과filtered through a layer of silica 2 cm) in a glassfilter
3. 3
   세척The residue was eluted with a mixture of heptane and EtOAc (3:1, 5×100 mL)
4. 4
   기타The combined filtrate and elutes were evaporated in vacuo

실험 절차

To a solution of tert-butyl 1-(5-chloropentyl)-1-cyclopropanecarboxylate (31.5 g, 128 mmol) in 2-butanone (150 mL) was added NaI (24.9 g, 166 mmol). The reaction mixture was stirred under reflux for 24 h, diluted with heptane (220 mL) and filtered through a layer of silica 2 cm) in a glassfilter. The residue was eluted with a mixture of heptane and EtOAc (3:1, 5×100 mL). The combined filtrate and elutes were evaporated in vacuo to give tert-butyl 1-(5-iodopentyl)-1-cyclopropanecarboxylate (42.3 g, 99%) as a slightly yellow liquid. 1H NMR (CDCl3): δ=3.18 (t, J=7.1 Hz, 2H), 1.82 (quintet, J=7.1 Hz, 2H), 1.48-1.33 (m, 6H), 1.42 (s, 9H), 1.10 (dd, J=6.8 Hz, Hz, 2H), 0.58 (dd, J=6.6, 3.9 Hz, 2H). 13C NMR (CDCl3): δ=174.0, 79.9, 34.1, 33.6, 30.8, 28.2 (3×), 26.8, 24.3, 15.4 (2×), 7.4. HRMS calcd for C13H2IO2 (M+): 338.0743. found: 338.0743.

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