Patent US4933498 (http://l2.espacenet.com/dips/viewer?PN=US4933498&CY=gb&LG=en&DB=EPD)
;)Post 417550 (https://www.thevespiary.org/talk/index.php?topic=11342.msg41755000#msg41755000)
(Antoncho: "Methyl tosylate: _finally_ , OTC!!!", Novel Discourse)Post 257912 (https://www.thevespiary.org/talk/index.php?topic=11282.msg25791200#msg25791200)
(Antoncho: "Alkali metal alkoxides: finally, OTC!", Novel Discourse)Post 189401 (missing)
(hest: "Re: 3,4,5 Trimethoxybenzaldehyde Synth", Chemistry Discourse), right?Yup. And I wonder how you can add a solution of 17.9 g bromovanillin in 50 mL of DMF to a 'solution' of 5 gr Na in 70 mL MeOH. Under nitrogen. In my experience, you need way more DMF to dissolve the bromovanillin than 50 ml.
Not a problem. The aldehyde is quite sol. in DMF.
Also, I think you can't 'pure outh' the reaction mixture on HCl/ice, since you've distilled almost all solvent away. Instead, you might add 200 ml ice-cold HCl with a Schlenk addition funnel.
You still have some liquid (100mL MeOH +50mL DMF = 150mL 150mL-80mL=70mL). Those 70mL is pored out in the Hydrochloric acic/ice mixture. The synt have been done in 10 and 100g scale's