It is not a synthesis but an extraction...
https://www.thevespiary.org/rhodium/Rhodium/chemistry/extraction.faq (https://www.thevespiary.org/rhodium/Rhodium/chemistry/extraction.faq)
How much HCl should be used to disolve the residual tar alkaloids? If one should add just enough to encompas the substance, than the ammount of total liquid would be no where near a litre. And sadly, I do not have a vacuum pump with which to suction filter. But assuming another method could be devised, what is a guide line for the amount of NaOH to use in basification? Would Diethyl Ether be a suitable non-polar solvent?