Catalytic hydrogenation of 1,8-bis(dimethylamino)-2-nitronaphthalene afforded previously unknown 2-amino-1,8-bis(dimethylamino)naphthalene. Its N-acetyl derivative and 1,2,8-tris(dimethylamino)naphthalene were prepared. The pK(a)(I) values of the 2-NH2-, 2-NHAc-, and 2-NMe2-substituted "proton sponges" determined by a competition method in DMSO are equal to 10.3, 7.5, and 9.0, respectively.
Catalytic hydrogenation of 1,8-bis(dimethylamino)-2-nitronaphthalene afforded previously unknown 2-amino-1,8-bis(dimethylamino)naphthalene. Its N-acetyl derivative and 1,2,8-tris(dimethylamino)naphthalene were prepared. The pK(a)(I) values of the 2-NH2-, 2-NHAc-, and 2-NMe2-substituted "proton sponges" determined by a competition method in DMSO are equal to 10.3, 7.5, and 9.0, respectively.
Novel hydrogen-phosphonodithioate compositions are provided which are particularly useful for forming internucleotide and internucleoside linkages in oligonucleosides or oligonucleotides. The oligonucleotides and analogs thereof made by using the hydrogen-phosphonodithioate compositions may be therapeutically useful as antiviral and anticancer agents and may have other therapeutic or diagnostic uses. A method for making the hydrogen-phosphonodithioates is provided as well as a method for converting same to an activated intermediate for substitution on the phosphorus atom.
Catalytic hydrogenation of 1,8-bis(dimethylamino)-2-nitronaphthalene afforded previously unknown 2-amino-1,8-bis(dimethylamino)naphthalene. Its N-acetyl derivative and 1,2,8-tris(dimethylamino)naphthalene were prepared. The pK(a)(I) values of the 2-NH2-, 2-NHAc-, and 2-NMe2-substituted "proton sponges" determined by a competition method in DMSO are equal to 10.3, 7.5, and 9.0, respectively.