Diethyl Ether → HCID 19823627, compound

Participants

Reaction Steps

1-(3,4-Dichlorophenyl)cyclobutanecarbonitrile (13 g) was added to a solution of 3-butenylmagnesium bromide [prepared from 4-bromobut-1-ene (10.6 g), magnesium (2 g) and ether (65 ml)]. The ether was replaced by toluene (60 ml) and the mixture heated for 21/2 hours. The mixture was then added to a solution of sodium borohydride (4.4 g) in ethanol (200 ml). The mixture was heated under reflux for one hour, cooled, added to water and the resulting mixture extracted with ether. The extract yielded 1-[1-(3,4-dichlorophenyl)cyclobutyl]pent-4-enylamine as an oil. This oil was added to a 1N solution of sodium dihydrogen phosphite [287 ml--prepared by mixing a solution of phosphorous acid (41 g) in water (100 ml) with sodium bicarbonate (42 g) and making the resulting solution up to 500 ml with water]. Methanol (350 ml) and 37-40% aqueous formaldehyde (25 ml) were added and the mixture heated under reflux for 11/2 hours and was then allowed to stand for 21/2 days. The methanol was removed by evaporation and the aqueous residue extracted with ether. The ether extract yielded an oil which was dissolved in ether. The solution was filtered and treated with an ethereal solution of maleic acid. An oil formed which was triturated with ether to give a semi-solid which was basified to give a N,N-dimethyl-1-[1-(3,4-dichlorophenyl)cyclobutyl]pent-4-enylamine.

Provenance & Evidence