so upon seperation of the nitriles, understandable that the vale nitrile is the wanted methadone and the butyonitrile isomethadone is unwanted.
say for instances this 60g (1.5 moles) of flake sodium hydroxide, 77.2g (0.4 moles) diphenylacetonitrile and 79g (0.5 moles) of 1-dimethylamino-2-choropropane hydrochloride were mixed in an erlenmeyer flask and heated with occasional stirring for 6-7 hours on a steam bath [or an oil bath with the temp at 100°C]. The reaction mixture was then extracted with ether and the ether in turn extracted ith dilute hydrochloric acid [~5% HCl(aq)]. The acid solution was made strongly alkaline with 25% sodium hydroxide solution, and the liberated base extracted with ether. The ether solution was dried over anhydrous potassium carbonate, filtered and the ether distilled off. The residue was vacuum distilled to give 89g of product, boiling at 173-174°C at 1 mmHg. It was then recrystallized from petroleum ether to give 49g (45.7%) of 2,2-Diphenyl-3-methyl-4-dimethylaminobutyronitrile, mp 89-90°C.
way was used, which leads to the isomethadone nitrile, then we follow up with the EMB-DE reflux , distill etc.. is the nitrile being seperated with this process with the following step , also have seen a few methods that employ the EMB in THF, that have said be successful. such as, but if it is not possible, can you briefly state as to why it would not.
A solution of 0.5 g of 2,2-diphenyl-4-dimethylaminovaleronitrile isomer has reacted in a certain amount of DESs and in another system 0.5 g of magnesium and in 8 ml of THF dry, react one hour, then 1.5 ml ethyl bromide was added by syringe glass which, during the addition the reaction starts to rise in temperature and boils, which indicates the formation of ethylene-magnesium bromide which ethyl magnesium bromide solution in dry THF