I don't find any process to synthetize piperonal from 3-4 dihydroxybenzaldehyde. Is it possible to do like the first step of this synth with benzaldehyde insteed benzene?
[url=https://www.thevespiary.org/rhodium/Rhodium/chemistry/safrole.html
... crazy synth for sweet dreams ...
3,4-dihydroxybenzaldehyde is also known as protocatechualdehyde.
Methylenation reactions can be found in
https://www.thevespiary.org/rhodium/Rhodium/chemistry/methylenation.html#methylenation (https://www.thevespiary.org/rhodium/Rhodium/chemistry/methylenation.html#methylenation)
Post 225611 (https://www.thevespiary.org/talk/index.php?topic=11418.msg22561100#msg22561100)
(foxy2: "Re: 4-Methylaminorex Synth w/o CNBr", Novel Discourse)Post 225616 (https://www.thevespiary.org/talk/index.php?topic=11418.msg22561600#msg22561600)
(foxy2: "Re: 4-Methylaminorex Synth w/o CNBr", Novel Discourse)Keep reading.
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Thanks !
But now the problem is that I don't own an autoclave. Is it possible to replace CH2Cl2 by CH2BR2(b.p. 97°)and reflux the whole instead heat under presure?
... crazy synth for sweet dreams ...
Yes, dibromomethane or diiodomethane may be used instead. In the link I posted there are a PTC reaction which does not use an autoclave too.