19-Hydroxy-4-oxo-PGI.sub.1 compounds

Sih, John C.;

The present invention provides novel 19-hydroxy-4-oxo-PGI.sub.1 compounds which are useful for pharmacological purposes. e.g., anti-asthmatic indications.

BACKGROUND OF THE INVENTION

The present invention provides novel prostacyclin analogs. Particularly, the present invention relates to prostacyclin analogs substituted at the C-19 position by hydroxy.

Particularly, the present invention relates to 19-hydroxy-4-oxo-PGI.sub.1 compounds. The novel prostacyclin analogs are useful for pharmacological purposes, e.g., as anti-asthmatic agents. The preparation and use of these compounds is incorporated here by reference from U.S. Pat. No. 4,225,508.

PRIOR ART

For background on prostacyclin, see for example R. A. Johnson, et al., Prostaglandins 12, 915-928 (1976) and R. A. Johnson, et al., J. Am. Chem. Soc. 100, 7690-7704 (1978), and, as to pharmacological activity, the references cited therein. For analogs of prostacyclin, see, for example, J. Fried, et al., Proc. Natl. Acad. Sci. U.S.A. 74, 2199-2203, K. C. Nicolaou, et al., J. C. S. Chem. Comm. 1977, 331-332, N. A. Nelson, J. Am. Chem. Soc. 99, 7362-7363 (1977), and K. Kojima, et al., Tetra. Letters, 1978, (1977), and K. Kojima, et al., Tetra. Letters, 1978, 3743-3746. Regarding the nomenclature for analogs of PGI.sub.2, see R. A. Johnson, et al., Prostaglandins 15, 737-740 (1978).

SUMMARY OF THE INVENTION

The present invention particularly provides a prostacyclin-type compound of the formula ##STR1## wherein L.sub.5 is

(1) --(CH.sub.2).sub.p --, wherein p is 2, 3, or 4,

or (2) --CH.sub.2 --CF.sub.2 --, wherein p is 2, 3, or 4,

wherein Q is oxo, .alpha.-H:.beta.-H, .alpha.-OH:.beta.-R.sub.4, or .alpha.-R.sub.4 :.beta.-OH,

wherein R.sub.4 is hydrogen or alkyl of one to 4 carbon atoms, inclusive,

wherein R.sub.1 is

(1) --COOR.sub.3,

(2) --CH.sub.2 OH,

(3) --CH.sub.2 N(R.sub.7)(R.sub.8),

(4) --CO--N(R.sub.7)(R.sub.8),

(5) --CO--NH--SO.sub.2 --R.sub.15, or

(6) tetrazolyl,

wherein R.sub.3 is

(a) hydrogen,

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(b) alkyl of one to 12 carbon atoms, inclusive,

(c) cycloalkyl of 3 to 10 carbon atoms, inclusive,

(d) aralkyl of 7 to 12 carbon atoms, inclusive,

(e) phenyl,

(f) phenyl substituted with one, 2, or 3 chloro or alkyl groups of one to 3 carbon atoms, inclusive;

(g) --(p-Ph)--CO--CH.sub.3,

(h) --(p-Ph)--NH--CO--(p-Ph)--NH--CO--CH.sub.3,

(i) --(p-Ph)--NH--CO--(Ph),

(j) --(p-Ph)--NH--CO--CH.sub.3,

(k) --(p-Ph)--NH--CO--NH.sub.2,

(l) --(p-Ph)--CH.dbd.N--NH--CO--NH.sub.2,

(m) .beta.-naphthyl,

(n) --CH.sub.2 --CO--R.sub.16,

wherein --(Ph)-- is phenylene and --(Ph) is phenyl;

wherein R.sub.16 is phenyl, p-bromophenyl, p-biphenylyl, p-nitrophenyl, p-benzamidophenyl, or 2-naphthyl, or

(o) a pharmacologically acceptable cation; wherein R.sub.7 and R.sub.8 are hydrogen, alkyl of one to 12 carbon atoms, inclusive, benzyl, or phenyl, being the same or different, and wherein R.sub.15 is hydrogen, alkyl of one to 12 carbon atoms, inclusive, phenyl, phenyl-substituted with one, 2, or 3 chloro or alkyl groups of one to 3 carbon atoms, inclusive, or phenyl substituted with hydroxycarbonyl or alkoxycarbonyl of one to 4 carbon atoms, inclusive, wherein R.sub.2 is hydrogen, hydroxyl, or hydroxymethyl, wherein R.sub.5 and R.sub.6 are hydrogen, alkyl of one to 4 carbon atoms, inclusive, or fluoro, being the same or different, with the proviso that one of R.sub.5 and R.sub.6 is fluoro only when the other is hydrogen or fluoro, and wherein X is

(1) trans--CH.dbd.CH--,

(2) cis--CH.dbd.CH--,

(3) --C.tbd.C--, or

(4) --CH.sub.2 CH.sub.2 --.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention particularly relates to the following compounds:

2-Decarboxy-2-hydroxymethyl-9-deoxy-6.xi.,9.alpha.-epoxy-4-oxo-19-hydroxy-P GF.sub.1, and

2-Decarboxy-2-hydroxymethyl-9-deoxy-6.xi.,9.alpha.-epoxy-4-oxo-16,16-difluo ro-19-hydroxy-PGF.sub.1.