Abstract: Compounds of formula I ##STR1## wherein Ar is an optionally substituted phenyl ring; B is a single bond, a group --(CH.sub.2 OCH.sub.2).sub.n being n=or 2, a a 2,4-disubstituted-1,3-dioxolane ring or a 2,4-disubstituted-1,3-thioxolane ring, R is a single bond, an optionally substituted methylene or ethylene group and T is 2, 3- or 4-pyridyl, an optionally salified or esterified carboxy group or a carboxyamide group. Said compounds are useful in treatment of respiratory diseases.

Abstract: This application relates to compounds of formula I; ##STR1## wherein R is hydrogen, a linear or branched C.sub.1 -C.sub.4 -alkyl, allyl or propargyl; X is O, CH.sub.2 or S; R.sub.1 is --(CH.sub.2).sub.n Ra, hydroxy, --O--(CH.sub.2).sub.n Ra, --NRbRc or --NH c(CH.sub.2).sub.m --NRbRc; Ra is hydrogen, a linear or branched C.sub.1 -CH.sub.4 -alkyl, phenyl, p-methoxy-phenyl, 3,4,5-trimethoxyphenyl, B-pyryidyl, cyclopentyl or cyclohexyl; Rb and Rc, can be the same or different and are selected independently in the group of hydrogen, linear or branched C.sub.1 -C.sub.4 -alkyl, cyclohexyl, cyclopentyl, benzyl, hexahydrobenzyl, .alpha.,.beta. or .gamma.-pyridylmethyl; or Rb and Rc taken together with the N atom to which they are bound can form a morpholino, piperidino or piperazino residue of formula Rd--N(CH.sub.2 --CH.sub.2).sub.2 --N-- wherein Rd is hydrogen, linear or branched C.sub.1 -C.sub.4 -alkyl, benzyl, hexahydrobenzyl, (C.sub.6 H.sub.5).sub.2 CH--, (p--F--C.sub.6 H.sub.4).sub.

Abstract: Cyclic amino-thioacetal amides of formula I ##STR1## wherein X is O, S, p is 1 or 2, R and R.sub.1 are optionally esterified hydrogen or carboxy, A is a single bond, methylene or ethylene, m is zero or 1, n is an integer 1 to 7 and y is a imidazole or .beta.-pyridylmethyl residue.Compounds I have valuable therapeutic properties.

Abstract: Compounds of formula I ##STR1## wherein Ar is an optionally substituted phenyl ring; B is a single bond, a group --(CH.sub.2 OCH.sub.2).sub.n being n=1 or 2, a 2,4-disubstituted-1,3-dioxolane ring or a 2,4-disubstituted-1,3-thioxolane ring, R is a single bond, an optionally substituted methylene or ethylene group and T is 2-, 3- or 4-pyridyl, an optionally salified or esterified carboxy group or a carboxyamide group. Said compounds are useful in treatment of respiratory diseases.