(±)-imino(phenyl)(thiophen-2-yl)-λ6-sulfanone 、 N,N-二甲基-3-氯丙胺 以there is obtained, in a yield of 38% of theory, N-(3-dimethylaminopropyl)-S-phenyl-S-(2-thienyl)-sulphoximide的产率得到N-(3-(Dimethylamino)propyl)-S-phenyl-S-2-thienylsulfoximine
Sulphoximide derivatives of the general formula: ##STR1## wherein R.sub.1 is a phenyl, thienyl, furyl or pyridyl ring; R.sub.2 is a thienyl, furyl, or pyridyl ring; R.sub.3 and R.sub.4 are the same or are different and are alkyl groups containing up to 6 carbon atoms or together with the nitrogen atom to which they are attached form a pyrrolidine, piperidine, or morpholine ring; and n is a whole number from 1 to 5; and the pharmaceutically acceptable organic and inorganic acid addition and quaternary ammoniuim salts thereof. The compounds of the invention exhibit anti-bronchospasmolytic activity.