摘要:
Disclosed herein is a process for obtaining indoline-2-carboxylic acid (or derivatives thereof) comprising the following steps: (a) reducing .alpha.-oxo-2-nitrobenzenepropanoic acid to .alpha.-hydroxy-2-nitrobenzenepropanoic acid, (b) replacing the hydroxyl group of the latter with a chlorine atom utilizing a selected Vilsmeier chlorinating reagent at temperatures of at least 20.degree. C., (c) reducing the nitro group of the resulting .alpha.-chloro-2-nitrobenzenepropanoic acid to obtain .alpha.-chloro-2-aminobenzenepropanoic acid, and (d) cyclizing the latter in aqueous base to form the desired indoline-2-carboxylic acid. Alternately, steps (c) and (d) may be combined in a one pot step by using, for example, a Raney nickel-hydrazine reducing medium.
摘要:
Disclosed herein is a process for producing an asymmetric indoline-2-carboxylic acid of the structural Formula: ##STR1## wherein X is hydrogen, bromine, chlorine, C.sub.1-4 alkyl or C.sub.1-4 alkoxy, which comprises:(a) assymetrically reducing an o-nitrophenylpyruvic acid III by contacting the acid III with a reducing complex formed from (R)-proline or (S)-proline, respectively, and sodium borohydride in an inert solvent to form, respectively, an (S) or (R)-.alpha.-hydroxy-2-nitrobenzenepropanoic acid IV;(b) reacting, respectively, said (S) or (R)-.alpha.-hydroxy-2-nitrobenzenepropanoic acid III with a Vilsmeier chlorinating reagent in which the chlorinating agent thereof is selected from a group consisting of thionyl chloride, oxalyl chloride, phosphorus oxychloride, phosphorus pentachloride and sulfuryl chloride and the amide thereof is selected from a group consisting of dimethylformamide, diethylformamide, dimethylacetamide and diethylacetamide, said reaction being run at temperatures of at least 20.degree. C., in order to obtain, respectively, and (R) or (S)-.alpha.-chloro-2-nitrobenzenepropanoic acid IV;(c) reducing the nitro group of said (R) or (S)-.alpha.-chloro-2-nitrobenzenepropanoic acid (V) to an amino group; and(d) cyclizing the resulting (R) or (S)-.alpha.-chloro-2-aminobenzenepropanoic acid in aqueous base.
摘要:
Disclosed herein is a process for obtaining indoline-2-carboxylic acid (or derivaties thereof) comprising the following step: (a) reducing .alpha.-oxo-2-nitrobenzenepropanoic acid to .alpha.-hydroxy-2-nitrobenzenepropanoic acid, (b) replacing the hydroxyl group of the latter with a chlorine atom utilizing a selected Vilsmeier chlorinating reagent at temperatures of at least 20.degree. C., (c) reducing the nitro group of the resulting .alpha.-chloro-2-nitrobenzenepropanoic acid to obtain .alpha.-chloro-2-aminobenzenepropanoic acid, and (d) cyclizing the latter in aqueous base to form the desired indoline-2-carboxylic acid. Alternately, steps (c) and (d) may be combined in a one pot step by using, for example, a Raney nickel-hydrazine reducing medium.
摘要:
Disclosed herein is a process for producing an asymmetric indoline-2-carboxylic acid of the structural Formula: ##STR1## wherein X is hydrogen, bromine, chlorine, C.sub.1-4 alkyl or C.sub.1-4 alkoxy, which comprises:(a) assymetrically reducing an o-nitrophenylpyruvic acid III by contacting the acid III with a reducing complex formed from (R)-proline or (S)-proline, respectively, and sodium borohydride in an inert solvent to form, respectively, an (S) or (R)-.alpha.-hydroxy-2-nitrobenzenepropanoic acid IV;(b) reacting, respectively, said (S) or (R)-.alpha.-hydroxy-2-nitrobenzenepropanoic acid III with a Vilsmeier chlorinating reagent in which the chlorinating agent thereof is selected from a group consisting of thionyl chloride, oxalyl chloride, phosphorus oxychloride, phosphorus pentachloride and sulfuryl chloride and the amide thereof is selected from a group consisting of dimethylformamide, diethylformamide, dimethylacetamide and diethylacetamide, said reaction being run at temperatures of at least 20.degree. C., in order to obtain, respectively, and (R) or (S)-.alpha.-chloro-2-nitrobenzenepropanoic acid IV;(c) reducing the nitro group of said (R) or (S)-.alpha.-chloro-2-nitrobenzenepropanoic acid (V) to an amino group; and(d) cyclizing the resulting (R) or (S)-.alpha.-chloro-2-aminobenzenepropanoic acid in aqueous base.
摘要:
Disclosed herein is a process for obtaining indoline-2-carboxylic acid (or derivatives thereof) comprising the following steps: (a) reducing .alpha.-oxo-2-nitrobenzenepropanoic acid to .alpha.-hydroxy-2-nitrobenzenepropanoic acid, (b) replacing the hydroxyl group of the latter with a chlorine atom utilizing a selected Vilsmeier chlorinating reagent at temperatures of at least 20.degree. C., (c) reducing the nitro group of the resulting .alpha.-chloro-2-nitrobenzenepropanoic acid to obtain .alpha.-chloro-2-aminobenzenepropanoic acid, and (d) cyclizing the latter in aqueous base to form the desired indoline-2-carboxylic acid. Alternately, steps (c) and (d) may be combined in a one pot step by using, for example, a Raney nickel-hydrazine reducing medium.
摘要:
Disclosed herein is a process for producing an asymmetric indoline-2-carboxylic acid of the structural Formula: ##STR1## wherein X is hydrogen, bromine, chlorine, C.sub.1-4 alkyl or C.sub.1-4 alkoxy, which comprises:(a) assymetrically reducing an o-nitrophenylpyruvic acid III by contacting the acid III with a reducing complex formed from (R)-proline or (S)-proline, respectively, and sodium borohydride in an inert solvent to form, respectively, an (S) or (R)-.alpha.-hydroxy-2-nitrobenzenepropanoic acid IV;(b) reacting, respectively, said (S) or (R)-.alpha.-hydroxy-2-nitrobenzenepropanoic acid III with a Vilsmeier chlorinating reagent in which the chlorinating agent thereof is selected from a group consisting of thionyl chloride, oxalyl chloride, phosphorus oxychloride, phosphorus pentachloride and sulfuryl chloride and the amide thereof is selected from a group consisting of dimethylformamide, diethylformamide, dimethylacetamide and diethylacetamide, said reaction being run at temperatures of at least 20.degree. C., in order to obtain, respectively, and (R) or (S)-.alpha.-chloro-2-nitrobenzenepropanoic acid IV;(c) reducing the nitro group of said (R) or (S)-.alpha.-chloro-2-nitrobenzenepropanoic acid (V) to an amino group; and(d) cyclizing the resulting (R) or (S)-.alpha.-chloro-2-aminobenzenepropanoic acid in aqueous base.
摘要:
Disclosed herein are novel 1,2,3,4,5,6-hexahydro[1,3,6]triazocino[1,2-a]benzimidazole of Formulas I and II: ##STR1## wherein R.sup.1 may be phenyl, m- or p-nitrophenyl, m- or p-methylsulfonylaminophenyl, napthtyl, naphthyl mono-substituted by nitro or methylsulfonylamino, benzofurazanyl, 2-pyrimidinyl, 2- or 4-pyridinyl, 2- or 4-naphthyridinyl, pyrazinyl, isoquinolinyl, or quinolinyl;R.sup.2 may be hydrogen; C.sub.1 -C.sub.8 alkyl; phenyl(C.sub.1 -C.sub.4)alkyl or substituted-phenyl(C.sub.1 -C.sub.4)alkyl, in which phenyl may have one to three substituents selected from C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, fluorine, chlorine or bromine; phenyl or substituted-phenyl in which the phenyl substituents are the same as for substituted-phenyl (C.sub.1 -C.sub.4)alkyl; 2- or 4-pyrimidinyl; pyrazinyl; imidazolyl; C.sub.1 -C.sub.4 alkanoyl; halo or dihalo-(C.sub.1 -C.sub.4)alkanoyl, in which halo is fluoro or chloro; benzoyl or benzoyl substituted on the phenyl ring by one or two C.sub.1 -C.sub.4 alkyl groups; C.sub.1 -C.sub.4 alkanoyloxy; C.sub.1 -C.sub.4 alkylamino(C.sub.1 -C.sub.4 alkanoyl; C.sub.1 -C.sub.4 alkyloxycarbonyl; C.sub.1 -C.sub.4 alkylaminocarbonyl; phenylaminocarbonyl in which phenyl may have one to three C.sub.1 -C.sub.4 alkyl groups; phenyloxy or naphthyloxy-(C.sub.1 -C.sub.4)alkyl in which the phenyl or naphthyl ring may be substituted by one to three C.sub.1 -C.sub.4 alkyl groups; C.sub.1 -C.sub.4 alkylsulfonyl; (C.sub.1 -C.sub.4)alkyl- or N-di-(C.sub.1 -C.sub.4 alkyl)carboxamido(C.sub.1 -C.sub.4)alkyl; N-phenyl or substituted phenyl-carboxamido-(C.sub.1 -C.sub.4)alkyl in which phenyl may be substituted as above for C.sub.1 -C.sub.4 alkyl-substituted phenyl; cyano; amidino in which each N atom is substituted by a C.sub.1 -C.sub.4 alkyl group; and C.sub.1 -C.sub.4 alkylguanidino; andR.sup.3 and R.sup.4 are, independently, selected from hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, fluorine and chlorine, or acid addition salts thereof. Compounds of formulas I and II having certain values of R.sup.2 are antiarrhythmic or antiischaemic agents. The remaining values of R.sup.2 provide intermediate compounds of formulas I and II.Also disclosed herein a novel tetrahydro-3-substituted-7-substituted-1H[1,2,5]triazepino[1,2-a][1,2,4]benzotriazines, wherein the 7 substituent may be --SMe, --Cl or Br and the 3 substituent is the same as R.sup.2 in formulas I and II above. These compounds also serve as intermediates for the production of the antiarrhythmic agents for formula II above.
摘要:
Disclosed herein are N-substituted-hexahydro-1,2,5-triazepines of formula I, which is ##STR1## or a pharmaceutically acceptable acid addition salt thereof, wherein R.sup.4 and R.sup.5 are independently hydrogen or C.sub.1 -C.sub.4 alkyl;R.sup.1 is (R.sup.6).sub.2 --CH--(CH.sub.2).sub.n -- in which n is 0, 1, 2 or 3 and R.sup.6 is p-fluoro, chloro or methoxyphenyl; andR.sup.3 is hydrogen and R.sup.2 is benzoyl, 2,6-dimethyl or diethylbenzoyl, 2,6-dichlorobenzoyl, N-methyl, ethyl or propylcarboxamido, N-phenylcarboxamido, N-2,6-dimethyl or diethylphenylcarboxamido, N-2,6-dichlorophenylcarboxamido, N-methyl, ethyl or propylacetamido, N-phenylacetamido, N-2,6-dimethyl or diethylphenylacetamido, or N-2,6-dichlorophenylacetamido orR.sup.2 and R.sup.3 are the same and are N-methyl, ethyl or propylcarboxamido, benzoyl, 2,6-dimethyl or diethlbenzoyl, 2,6-dichlorobenzoyl, benzyl, 2,6-dimethyl or diethlbenzoyl, 2,6-dichlorobenzoyl, or a removable amino protective group. Also disclosed are N-substituted-hexahydro-1,2,5-triazepines of formula II in which R.sup.1 of formula I is replaced by R.sup.7 which is C.sub.1 -C.sub.4 alkyl, and R.sup.2 and R.sup.3 of formula I are replaced by R.sup.8 and R.sup.9 which are, respectively, N-2,6-dimethyl, diethyl or dichlorophenylcarboxamido or N-2,6-dimethyl, diethyl or dichlorophenylacetamido and hydrogen. The compounds of the invention have antiarrhythmic properties or are intermediates for the preparation thereof.
摘要:
Octamethyleneiminoalkyl and heptamethyleneiminoalkyl ethers of 2,2'- and 3,3'-dihydroxybenzil are prepared by reacting the dithallium salt of 2,2'- or 3,3'-dihydroxybenzil with an N-chloroalkyl octamethyleneimine or heptamethyleneimine. The products have antiarrhythmic activity.