Abstract:
Intermediate compounds, including 2-(t-butyldimethylsilyloxymethyl)-3,4-null(dimethylmethylene)dioxynull-5-hydroxy-tricyclonull5.2.1.02,6nulldec-8-ene, which are useful for the synthesis of neplanocin A having strong antitumor activity. Improved processes for the preparation of neplanocin A, starting from optically active 2-hydroxymethyl-5-hydroxy-tricyclonull5.2.1.02,6nulldeca-3,8-diene and via a key step comprising a retro-Diels-Alder reaction of the above intermediate.
Abstract:
This invention is directed to purine derivatives of the following formulae: ##STR1## wherein Z.sup.1 is --O--, --N(R.sup.10)-- or --CH.sub.2 O--; Z.sup.2 is --O--, --N(R.sup.10)-- or --OCH.sub.2 --; R.sup.1 and R.sup.4 are each independently hydrogen, halo, alkyl, --OR.sup.10, --C(O)OR.sup.10, --C(O)N(R.sup.10)R.sup.11, --N(R.sup.10)R.sup.11, --N(R.sup.10)C(O)R.sup.10, or --N(H)S(O).sub.2 R.sup.13 ; R.sup.2 is --C(NH)NH.sub.2, --C(NH)N(H)OR.sup.10, --C(NH)N(H)C(O)OR.sup.13, --C(NH)N(H)C(O)R.sup.10, --C(NH)N(H)S(O).sub.2 R.sup.13, or --C(NH)N(H)C(O)N(H)R.sup.10 ; R.sup.3 is halo, alkyl, haloalkyl, haloalkoxy, ureido, cyano, guanidino, --OR.sup.10, --C(NH)NH.sub.2, --C(NH)N(H)OR.sup.10, --C(O)N(R.sup.10)R.sup.11, --R.sup.12 --C(O)N(R.sup.10)R.sup.11, --CH(OH)C(O)N(R.sup.10)R.sup.11, --N(R.sup.10)R.sup.11, --R.sup.12 --N(R.sup.10)R.sup.11, --C(O)OR.sup.10, --R.sup.12 --C(O)OR.sup.10, --N(R.sup.10)C(O)R.sup.10, (1,2)-tetrahydropyrimidinyl (optionally substituted by alkyl), (1,2)-imidazolyl (optionally substituted by alkyl), or (1,2)-imidazolinyl (optionally substituted by alkyl); R.sup.5 is hydrogen, halo, alkyl, cycloalkyl, haloakyl, aryl, aralkyl, alkylthio, hydroxy, mercapto, alkoxy, or --N(R.sup.10)R.sup.11 ; and R.sup.6 is defined herein. These compounds are useful as anti-coagulants. This invention is also directed to pharmaceutical compositions containing the compounds of the invention, and methods of using the compounds to treat disease-states characterized by thrombotic activity.
Abstract:
A method and composition for the treatment of humans infected with HBV that includes the administration of an HBV treatment amount of a .beta.-dioxolanyl purine nucleoside of the formula: ##STR1## wherein R is OH, Cl, NH.sub.2, or H, or a pharmaceutically acceptable salt or derivative of the compound, optionally in a pharmaceutically acceptable carrier or diluent.
Abstract:
Novel xanthine compounds represented by the following formula: ##STR1## wherein each of X.sup.1 and X.sup.2 independently represents oxygen or sulfur; and Q represents; ##STR2## where ----- represents a single bond or a double bond; Y represents a single bond or alkylene, n represents 0 or 1, each of W.sup.1 and W.sup.2 independently represents hydrogen, lower alkyl or amino, Z represents --CH.sub.2 -, --O--, --S-- or --NH--; represents ##STR3## each of R.sup.1 and R.sup.2 independently represents hydrogen, lower alkyl, allyl or propargyl; and R.sup.3 represents hydrogen or lower alkyl, and when Q represents the groups other than ##STR4## each of R.sup.1, R.sup.2 and R.sup.3 independently represents hydrogen or lower alkyl;provided that when Q is ##STR5## then R.sup.1 R.sup.2 and R.sup.3 are notsimultaneously methyl; and pharmaceutically acceptable salts thereof have a diuretic effect, a renal-protecting effect and a bronchodilatory effect.
Abstract:
A polymer composition is disclosed composed of morpholino subunit structures which are linked together by uncharged, achiral linkages. These linkages are one to three atoms in length, joining the morpholino nitrogen of one subunit to the 5' exocyclic carbon of an adjacent subunit. Each subunit contains a purine or pyrimidine base-pairing moiety effective to bind by hydrogen bonding to a specific base or base-pair in a target polynucleotide.
Abstract:
Compounds useful as antiviral agents are defined by the following formula: ##STR1## and the pharmaceutically acceptable acid addition salts thereof whereinR.sup.1 is hydrogen or --C(O)R.sup.7 wherein R.sup.7 is hydrogen, alkyl of one to nineteen carbon atoms, hydroxyalkyl of one to eight carbon atoms, alkoxyalkyl of two to nine carbon atoms, alkenyl of two to nineteen carbon atoms, phenyl, 1-adamantyl or 2-carboxyethyl and the pharmaceutically acceptable alkali metal salts thereof;R.sup.2 is --C(O)R.sup.7 is as defined above;R.sup.3 is hydrogen, halo, thio, lower alkylthio of one to six carbon atoms, azido, NR.sup.9 R.sup.10 wherein R.sup.9 and R.sup.10 are independently hydrogen or lower alkyl of one to six carbon atoms or --NHC(O)R.sup.8 wherein R.sup.8 is hydrogen, alkyl of one to nineteen carbon atoms or 1-adamantyl; and(a) R.sup.6 is hydrogen, halo, lower alkoxy of one to six carbon atoms, azido, thio, lower alkylthio of one to six carbon atoms, --NR.sup.9 R.sup.10 and R.sup.9 and R.sup.10 are as defined above or --NHC(O)R.sup.8 is as defined above and R.sup.4 together with R.sup.5 is a bond; or(b) R.sup.5 together with R.sup.6 is a keto group and R.sup.4 is hydrogen.
Abstract:
Novel purine derivatives, particularly novel guanines and hypoxanthines, are described as agents for treating autoimmune diseases. Also novel methods of manufacture for the derivatives, pharmaceutical compositions thereof, and methods of use therefor are the invention.
Abstract:
Compounds of the formula ##STR1## wherein A, B, C and D are --N.dbd., HN.dbd., R.sub.3 N.dbd., O.dbd.C.dbd., HC.tbd., HO--C.tbd. or R.sub.3 SO.sub.2 --O--C.tbd.; andR.sub.1 and R.sub.2 are substituents of various types.The compounds are useful as hypotensives and cardiotonics.