CH3OCH3

1
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CH3OCH3
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EtOEt
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CH3OCH2CH3
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MTBE
2
tetrahydrofurane
oxane
1,3-dioxane
1,4-dioxane
THF
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RO CH3Br ? R-O-CH3 Br
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H2SO4
-H2O
3
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R-O-R 2 HBr ? 2 RBr H2O
H
RBr R-OH
Br
4
Crown ethers
12-crown-4
1.2-1.5 Å
2.6-3.2 Å
18-crown-6
1.7-2.2 Å
15-crown-5
2.66Å
1.80Å
1.35Å
5
(No Transcript)
6
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KOH

18-C-6
Template
7
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Phase transfer catalyst
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