Hypophosphorus Acid Synthesis???

[FlyMcgee]

Hi wonderful people
Can anyone help me with a solution on how to make hypophosphorus acid and/or anything else that one can use in the Ephedrine-Iodine-hypophosphorus acid synthesis? Without needing to have red phosphorus on hand. Also are there any other names this acid can go by that aren’t the desired one? Or are?? Eg: hypophosphoric acid, hypo acid etc. will these work or no?
Anyways,
I will truly appreciate any advice.
Fly from the land of Oz

 

[Osmosis Vanderwaal]

Hypophosphorous acid can be made a few ways, most of them starting with phosphorus. ones that don't start from elemental phosphorous include;

Hydrolysis of phosphorus trichloride to phosphorus acid then hydrogenation ot a strong base to hypophosphorus acid

Oxidation of phosphine gas with water or oxygen

Sodium hypophosphite with sulfuric acid

There are 2 species near hypophosphorous acid that can do the trick and several that cant. I haven't looked at that method in a long time, but rust inhibitor, made of sodium hypophosphite, can also be made into hypophosphorus acid

 

[FlyMcgee]

Thank you so much, has helped a lot.

 

[GhostChemist]

General schemes for produce hypophosphorous acid

 

[GhostChemist]

Ca(OH)2 can be used instead Ba(OH)2