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Topic: Hydroxy Benzaldehyde  (Read 3530 times)

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Offline technologist

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Hydroxy Benzaldehyde
« on: December 05, 2007, 07:18:43 AM »
Anybody can suggest me any practical method to produce following Hydroxy Benzaldehydes starting from Benzaldehyde.

1. Mono Hydroxy Benzaldehyde.
2. Dihydroxy Benzaldehyde. ( What will the composition of Ortho & Para).

Thanx in advance.
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Offline AWK

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Re: Hydroxy Benzaldehyde
« Reply #1 on: December 05, 2007, 08:42:35 AM »
Quote
1. Mono Hydroxy Benzaldehyde.
see Reimer-Tiemann reaction - synthesis from phenol
Synthesis from benzaldehyde will be quite difficult.

The same method may be used for dihydroxybenzenes
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Offline sjb

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Re: Hydroxy Benzaldehyde
« Reply #2 on: December 05, 2007, 01:37:00 PM »
Casiraghi, G.; Casnati, G.; Puglia, G.; Sartori, G.; Terenghi, G. J. Chem. Soc. Perkin I, 1980, 1862-1865 - selective for o-hydroxybenzaldehyde, at http://dx.doi.org/10.1039/P19800001862 (from Clayden, have not seen the original paper)

[CH2O]n, SnCl4, R3N, PhMe

S
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