| abstract |
1292472 Esters of diphenols SPA-SOC PRODOTTI ANTIBIOTICI SpA 10 June 1971 [16 June 1970] 29047/70 Headings C2C and C2P Novel compounds (I) (including salts thereof) where R 1 is H or C 1 to C 6 alkyl, R 2 is C 1 to C 6 alkyl or a heterocycle or CR 1 R 2 signifies a saturated or unsaturated carbocyclic or heterocyclic radical, R 3 is a polybasic inorganic acid residue (e.g. derived from sulphuric, phosphoric or sulphurous acid) and R 4 is H, acyl or R 3 with the proviso that R 4 is not sulpho when R 3 is sulpho and CR 1 R 2 signifies isopropylidene, 2-picolylidene or 3-phthalidylidene, are made by esterifying either the corresponding di - hydroxy compounds or the related dihydroxy compounds carrying halo substituent(s) on the benzene rings and which are adjacent to the hydroxy groups, in which case the halogen atom(s) are subsequently removed. Pharmaceutical preparations having laxative action contain (I) as active ingredient; administration may be orally, rectally or parenterally. |