US2980692A - 3-indolemethanephosphonic acid and its salts and preparation thereof - Google Patents
3-indolemethanephosphonic acid and its salts and preparation thereof Download PDFInfo
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- US2980692A US2980692A US751155A US75115558A US2980692A US 2980692 A US2980692 A US 2980692A US 751155 A US751155 A US 751155A US 75115558 A US75115558 A US 75115558A US 2980692 A US2980692 A US 2980692A
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- acid
- indolemethanephosphonic
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- lower alkyl
- indolemethanephosphonate
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- CRLPUGWRYJQBEJ-UHFFFAOYSA-N 1H-indol-3-ylmethylphosphonic acid Chemical compound N1C=C(C2=CC=CC=C12)CP(O)(=O)O CRLPUGWRYJQBEJ-UHFFFAOYSA-N 0.000 title claims description 12
- 150000003839 salts Chemical class 0.000 title description 9
- 238000002360 preparation method Methods 0.000 title description 2
- -1 methanephosphonic acid radical Chemical class 0.000 description 23
- 239000002253 acid Substances 0.000 description 15
- 239000000203 mixture Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 8
- SIKJAQJRHWYJAI-UHFFFAOYSA-N benzopyrrole Natural products C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 5
- 125000000217 alkyl group Chemical group 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- PZOUSPYUWWUPPK-UHFFFAOYSA-N indole Natural products CC1=CC=CC2=C1C=CN2 PZOUSPYUWWUPPK-UHFFFAOYSA-N 0.000 description 4
- SEOVTRFCIGRIMH-UHFFFAOYSA-N indole-3-acetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CNC2=C1 SEOVTRFCIGRIMH-UHFFFAOYSA-N 0.000 description 4
- RKJUIXBNRJVNHR-UHFFFAOYSA-N indolenine Natural products C1=CC=C2CC=NC2=C1 RKJUIXBNRJVNHR-UHFFFAOYSA-N 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- SBCYLPFJQSOUHQ-UHFFFAOYSA-N 3-(diethoxyphosphorylmethyl)-1h-indole Chemical compound C1=CC=C2C(CP(=O)(OCC)OCC)=CNC2=C1 SBCYLPFJQSOUHQ-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 229960000583 acetic acid Drugs 0.000 description 3
- 238000005903 acid hydrolysis reaction Methods 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 239000012085 test solution Substances 0.000 description 3
- BDZBKCUKTQZUTL-UHFFFAOYSA-N triethyl phosphite Chemical compound CCOP(OCC)OCC BDZBKCUKTQZUTL-UHFFFAOYSA-N 0.000 description 3
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 125000005907 alkyl ester group Chemical group 0.000 description 2
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 239000012362 glacial acetic acid Substances 0.000 description 2
- OCDGBSUVYYVKQZ-UHFFFAOYSA-N gramine Chemical compound C1=CC=C2C(CN(C)C)=CNC2=C1 OCDGBSUVYYVKQZ-UHFFFAOYSA-N 0.000 description 2
- GOERTRUXQHDLHC-UHFFFAOYSA-N gramine Natural products COC1=CC=C2NC=C(CN(C)C)C2=C1 GOERTRUXQHDLHC-UHFFFAOYSA-N 0.000 description 2
- 150000007529 inorganic bases Chemical class 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 150000007530 organic bases Chemical class 0.000 description 2
- 230000008635 plant growth Effects 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 229940083608 sodium hydroxide Drugs 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- HPKXPFRRVVWAPD-UHFFFAOYSA-N 3-(piperidin-1-ylmethyl)-1h-indole Chemical compound C=1NC2=CC=CC=C2C=1CN1CCCCC1 HPKXPFRRVVWAPD-UHFFFAOYSA-N 0.000 description 1
- KCMZYCFSSYXEQR-UHFFFAOYSA-N CCCC[K] Chemical compound CCCC[K] KCMZYCFSSYXEQR-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical class [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- 244000211187 Lepidium sativum Species 0.000 description 1
- 235000007849 Lepidium sativum Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 229940116024 aftera Drugs 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 238000005904 alkaline hydrolysis reaction Methods 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 125000004202 aminomethyl group Chemical group [H]N([H])C([H])([H])* 0.000 description 1
- 230000003042 antagnostic effect Effects 0.000 description 1
- 239000005557 antagonist Substances 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical class [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 159000000009 barium salts Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- BBBFJLBPOGFECG-VJVYQDLKSA-N calcitonin Chemical compound N([C@H](C(=O)N[C@@H](CC(C)C)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CC=1NC=NC=1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CC=1C=CC(O)=CC=1)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H]([C@@H](C)O)C(=O)NCC(=O)N[C@@H](CO)C(=O)NCC(=O)N[C@@H]([C@@H](C)O)C(=O)N1[C@@H](CCC1)C(N)=O)C(C)C)C(=O)[C@@H]1CSSC[C@H](N)C(=O)N[C@@H](CO)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CO)C(=O)N[C@@H]([C@@H](C)O)C(=O)N1 BBBFJLBPOGFECG-VJVYQDLKSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 125000006264 diethylaminomethyl group Chemical group [H]C([H])([H])C([H])([H])N(C([H])([H])*)C([H])([H])C([H])([H])[H] 0.000 description 1
- VAYGXNSJCAHWJZ-UHFFFAOYSA-N dimethyl sulfate Chemical compound COS(=O)(=O)OC VAYGXNSJCAHWJZ-UHFFFAOYSA-N 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000003617 indole-3-acetic acid Substances 0.000 description 1
- 150000002475 indoles Chemical class 0.000 description 1
- 125000001041 indolyl group Chemical group 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000002786 root growth Effects 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XTTGYFREQJCEML-UHFFFAOYSA-N tributyl phosphite Chemical compound CCCCOP(OCCCC)OCCCC XTTGYFREQJCEML-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
- C07F9/553—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having one nitrogen atom as the only ring hetero atom
- C07F9/572—Five-membered rings
- C07F9/5728—Five-membered rings condensed with carbocyclic rings or carbocyclic ring systems
Definitions
- the present invention resides in the concept of a composition of matter having a molecular structure wherein a methanephosphonic acid radical, -CH PO H is attached to the 3-position of indole; the salts of such composition; a process for preparing the compositions; and intermediates in said process.
- the phy'sical embodiments of the inventive concept have plant growth regulant properties.
- they are inhibitors of heteroauxin (S-indoleacetic acid) and are thus useful as antagonists of plant growth;
- the embodiment o'f'the inventive concept can be accomplished by interactingfa t'ri-lower alkyl phosphite and a 3-indole-methyl-quatern ary ammonium salt having the structural formula where B represents a member of the group, consisting of dimethyl, diethyl, and 1,5-pentylene (CH CH CH CH CH radicals, and An represents a member of the group consisting of the iodide radical and the methosulfate radical, to produce a di-lower alkyl 3-indolemethanephos phonate, which ester is then hydrolyzed to produce 3-indolemethanephosphonic acid; and this dibasic acid can, if desired, be interacted with-either one or two equivalents of an organic or inorganic base to form acor-responding organic or inorganic salt.
- B represents a member of the group, consisting of dimethyl, diethyl, and 1,5-pentylene (CH CH CH CH CH
- lower alkyl as used in the specification and claims represents in each instance branched and unbranched alkyl radicals-having 1-4 carbon atoms and accordingly includes methyl,.ethyl, isopropyl, n-butyl;:and the like.
- the tri lower alkyl phosphites employed-asa starting material' are known and readily obtained compounds.
- The-3-indole methyl-quaternary ammonium salt reactants ⁇ are known and readily obtained compounds.
- The-3-indole methyl-quaternary ammonium salt reactants ⁇ are used to interacting an appropriate 3-(N,N-dis'ubstituted aminomethyl)indo1e, that is 3-(N,N-dimethylamino"- methyl) indole grami-ne) 3- (N ,N-diethylamirfomet-liyl indole, or 3-(piperidinomethyl)indole, with methyl'iddide' 2,980,692 Patented Apr. 18, 1961 action medium which facilitates stirring of the mixture.
- This reaction is-preferably carried out at a temperature in-the' approximate range degrees centigrade to degrees centigrade, and at least several hours reaction time is required for optimum yields.
- the di-lower alkyl 3'indolemethanephosphonates obtained as intermediates in my process are white solids which are practically insoluble in water and are moderately soluble in ethanol. They are hydrolyzed by aqueous alkaline solutions to the corresponding mono-lower alkyl esters which, like the di-lower alkyl esters, are hydrolyzed by strong mineral acid-glacial acetic acid mixtures to yield 3-indolemethanephosphonic acid.
- the di-lower alkyl 3-indolemethanephosphonate resulting from the first'step is heated, conveniently at reflux temperature, for several hours or more with a mixture of glacial acetic acid and a strong mineral acid, such as hyrochloric acid, phosphoric acid, or sulfuric acid.
- a strong mineral acid such as hyrochloric acid, phosphoric acid, or sulfuric acid.
- EXAMPLE 1 Diethyl 3-indolemethanephosphonate 7.1 g. of inethyliodide was dripped into a stirred suspension of 8.7 g. of gramine in 65 g. of triethyl phosphite at room temperature (about 25 degrees centigrade) during a period of fifteen minutes, and the reaction mixture was then heated for ten hours on a steam bath. After this heating period, the reaction mixture was filtered to remove the solid material which had separated from solution, and the collected solid was washed with about 25 ml. of benzene.
- This acid is soluble in water at 25 C. to the extent of about 0.5% (weight/volume).
- the pH of a 0.5% solution was 2.2; when a 0.5% aqueous solution was adjusted to pH-7.0 by treatment with N/ sodium hydroxide solution, no precipitate was formed.
- the acid was soluble in diethyl ether and fairly soluble in isopropyl alcohol.
- My new compounds can be employed to combat the growth of unwanted vegetation by application to, the plants by the conventional methods, for instance dusting, spraying, and the like.
- spraying I generally preferan aqueous solution of the monosodium or disodium salt'of 3-indolemethanephosphonic acid.
- '3-indolemethanephosphonic' acid has a relatively low toxicity toward animals; for example, oral doses in the ormonkeys.
- 3-indolemethanephosphonic acid having the structural formula range'l00-200 mg./kg. had no detectable effect on cats acid.
- the process which comprises heating a mixture of a tri-lower alkyl phosphite and a 3-indolemethy1 quateifl nary ammonium salt having the structural formula where B represents a member of the group consisting of dimethyl, diethyl, and 1,5-pentylene radicals and An represents a member of the group consisting of the iodide radical and the methosulfate radical, to produce a dilower alkyl 3-indolemethanephosphonate.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Molecular Biology (AREA)
Description
United States PatentC 'ice S-INDOLEMETHANEPHOSPHONIC ACID AND ITS SALTS AND PREPARATION THEREOF Noel F. Albertson, Castleton on Hudson, 'N.Y., assignmto Sterling'Di-ug I'ne, New York, N.Y., a eorporanon of Delaware No Drawing. Filed'July- 28, 1958, SenNo. 751,155- 8 Claims. or. 260-319) This invention relates to- I i-substituted indoles.
The present invention resides in the concept of a composition of matter having a molecular structure wherein a methanephosphonic acid radical, -CH PO H is attached to the 3-position of indole; the salts of such composition; a process for preparing the compositions; and intermediates in said process.
The phy'sical embodiments of the inventive concept have plant growth regulant properties. In particular, they are inhibitors of heteroauxin (S-indoleacetic acid) and are thus useful as antagonists of plant growth;
The embodiment o'f'the inventive concept can be accomplished by interactingfa t'ri-lower alkyl phosphite and a 3-indole-methyl-quatern ary ammonium salt having the structural formula where B represents a member of the group, consisting of dimethyl, diethyl, and 1,5-pentylene (CH CH CH CH CH radicals, and An represents a member of the group consisting of the iodide radical and the methosulfate radical, to produce a di-lower alkyl 3-indolemethanephos phonate, which ester is then hydrolyzed to produce 3-indolemethanephosphonic acid; and this dibasic acid can, if desired, be interacted with-either one or two equivalents of an organic or inorganic base to form acor-responding organic or inorganic salt.
The term lower alkyl as used in the specification and claims represents in each instance branched and unbranched alkyl radicals-having 1-4 carbon atoms and accordingly includes methyl,.ethyl, isopropyl, n-butyl;:and the like.
In the first step. of-the process of my invention, the tri lower alkyl phosphites employed-asa starting material'are known and readily obtained compounds.- The-3-indole methyl-quaternary ammonium salt reactants} ,a'rereadily obtained by interacting an appropriate 3-(N,N-dis'ubstituted aminomethyl)indo1e, that is 3-(N,N-dimethylamino"- methyl) indole grami-ne) 3- (N ,N-diethylamirfomet-liyl indole, or 3-(piperidinomethyl)indole, with methyl'iddide' 2,980,692 Patented Apr. 18, 1961 action medium which facilitates stirring of the mixture. This reaction is-preferably carried out at a temperature in-the' approximate range degrees centigrade to degrees centigrade, and at least several hours reaction time is required for optimum yields.
The di-lower alkyl 3'indolemethanephosphonates obtained as intermediates in my process are white solids which are practically insoluble in water and are moderately soluble in ethanol. They are hydrolyzed by aqueous alkaline solutions to the corresponding mono-lower alkyl esters which, like the di-lower alkyl esters, are hydrolyzed by strong mineral acid-glacial acetic acid mixtures to yield 3-indolemethanephosphonic acid.
In the second, or acid hydrolysis, step of my proces the di-lower alkyl 3-indolemethanephosphonate resulting from the first'step is heated, conveniently at reflux temperature, for several hours or more with a mixture of glacial acetic acid and a strong mineral acid, such as hyrochloric acid, phosphoric acid, or sulfuric acid. This procedure removes both of the lower alkyl groups and produces the free dibasic acid, 3-ind0lernethanephosphonic acid. This white'crystalline product is readily isolated and easily purified. It can be used as such or converted to any desired salt by conventional treatment with the appropriate organic or inorganic base.
My invention is'illustrated by the following examples without, howevenbeing limited thereto.
EXAMPLE 1 A. Diethyl 3-indolemethanephosphonate 7.1 g. of inethyliodide was dripped into a stirred suspension of 8.7 g. of gramine in 65 g. of triethyl phosphite at room temperature (about 25 degrees centigrade) during a period of fifteen minutes, and the reaction mixture was then heated for ten hours on a steam bath. After this heating period, the reaction mixture was filtered to remove the solid material which had separated from solution, and the collected solid was washed with about 25 ml. of benzene. The filtrate and wash liquor were combined and concentratedunder reduced pressure, and the residue thus obtained, which weighed 25 g., was shaken with a mixture of ether and water. The ether layer was separated and concentrated, and then distilled. 'Aftera small fore-run of triethyl phosphite had distilled, the
boilin-gpoint of the residual liquid ro'se rapidly. The f.
CHn-P\ I] 0 023. N
it A nalysia Calculated for c H' om; Nitregen,
5.24%;oxygen', 17.96%. Found: Nitrogn,[5.2 1%; ox'y gen, 17;90% 1 When equivalent" amounts of 3 -diethylaminoinetl1yD indole and 3-(piperidinomethyl')indoleare substituted for the gramine reactant in the above" procedure, there is obtained in each instance the same product as above described, nam'elydiethyl 3-indolemetlianepliosphonate.
H5 3-'i izdolemethaizephbsplionic acid solved in a mixture of 25 ml. of acetic acid and 25 ml.
5.1 of diethyl 3 indolernethanephospho'nate wasdisessence J 1 of concentrated hydrochloric acid, and the resulting solution was refluxed for nine hours. The reaction was then concentrated under reduced pressure. The crystalline residue thus obtained was recrystallized from 30 ml. of water and then from 13 ml. of water, thereby yielding 2.1 g. of almost-white crystals which melted at 216.8- 218.4 C. (corn). This product was 3-indolemethanephosphonic acid, having the structural formula Analysis-Calculated for C H NO P: Nitrogen,
6.63%; neutral equivalent, 106. 6.54%; neutral equivalent, 110.
This acid is soluble in water at 25 C. to the extent of about 0.5% (weight/volume). The pH of a 0.5% solution was 2.2; when a 0.5% aqueous solution was adjusted to pH-7.0 by treatment with N/ sodium hydroxide solution, no precipitate was formed. The acid was soluble in diethyl ether and fairly soluble in isopropyl alcohol.
3indolemethanephosphonic acid reacted with inorganic andorganic bases to form the corresponding monoor di-salts, depending on whether one or two equivalents of Lbase was employed. The water-soluble alkali metal salts and the ammonium salts are especially useful and economical forms for many purposes, but other salts are also readily obtained and maybe preferred in some instances,*for example: the alkaline earth metal salts,
Found: Nitrogen,
for. instancethe calcium, magnesium, and barium salts; the copper, mercury, and arsenic salts; and substituted-- amomnium salts, for instance the dimethylammonium EXAMPLE 2 7 A. Monoethyl 3-ind0lemethanephosphonate .Alkaline hydrolysis of diethyl 3-indolemethanephosphonate, for-instance by heating it for several. hours with 5% --sod ium- -hyd roxide solution, produces ethyl sodium 3-indolemethanephosphonate. which on treatment with one equivalent ofhydrochloric acid or other strong acid isfco'nverted to monoethyl 3-indolemethanephosphonate,
136-137 (3., having the structural formula B. 3-indolemethanephosphonic acid Acid hydrolysis of the monoethyl S-indoI'emetha'nephosphonate described in part A above,,-using thev samehydrolysis conditions as described in part B of Example 1, produces S-indolemethanephosphonic acid, identical with the product from the acid hydrolysis of the diethyl ester.
" EXAMPLE 3 A. Di-n-butyl 3 indolemethanephosphonate By substituting 98 g. of tri-n-butyl phosphite for the triethyl phosphite and 6.3 g. of dimethyl sulfate for the methyliodide in'the procedure described in part'A of 4 7 M Example -1, there is obtained di-n-butyl 3-indolemethanephosphonate, having the structural formula B. Mono-rt-butyl 3-indolemethanephosphonate By hydrolysis of -di-n-butyl 3-indolemethanephosphonate with aqueous potassium hydroxide solution to pro- .duce n-butyl potassium 3-indolemethanephosphonateand treating this ester-salt with strong acid, there is obtained C. 3-indolemethanephosphonic acid inhibition can be readily determined by means of stand- For instance, the following method is used. An aqueous solution containing ard biological test procedures.
10- of heteroauxin per ml. is employed as a control. A series of aqueous'test solutions containing 3-indolemethanephosphonic acid, or mono or disodium salt thereof, at concentrations of 1 up to 1000 per m1., is prepared and to each solution there is added suflicient heteroauxin so that. its concentration in thesolution is l0- 'y per ml.
These solutions are then applied to the roots of a test plant, such as Lepidium sativum, and the plants are incubated at 27 C. in the dark for 12-18 hrs. By measuring the root lengths before and after the test and comparing thecontrols with the test solutions, the antagonistic eifect of the various concentrations of 3-indolemethanephosphonic acid, or salt thereof, can be calculated in terms of the percentage difference in root lengths.
The normal stimulation of root growth by the heteroauxin is diminished by the presence of the 3-indolemethanephosphonic compound, so that the root lengths are shorter in the test solutions thanin the controls.
My new compounds can be employed to combat the growth of unwanted vegetation by application to, the plants by the conventional methods, for instance dusting, spraying, and the like. When spraying is used, I generally preferan aqueous solution of the monosodium or disodium salt'of 3-indolemethanephosphonic acid.
'3-indolemethanephosphonic' acid has a relatively low toxicity toward animals; for example, oral doses in the ormonkeys.
I claim: I
--1. 3-indolemethanephosphonic acid, having the structural formula range'l00-200 mg./kg. had no detectable effect on cats acid.
2. alkalimetal salt of 3 -indolemethanephosphonic 0; A sodium salt of 3-indolemethanephosphonic acid.
i w cm 4. The process which comprises: heating a mixture of a tri-lower alkyl phosphite and a 3-indolemethyl-quaternary ammonium salt having the structural formula CH: CHr-l T=B in it 6. The process which comprises heating a mixture of a tri-lower alkyl phosphite and a 3-indolemethy1 quateifl nary ammonium salt having the structural formula where B represents a member of the group consisting of dimethyl, diethyl, and 1,5-pentylene radicals and An represents a member of the group consisting of the iodide radical and the methosulfate radical, to produce a dilower alkyl 3-indolemethanephosphonate.
7. A compound of the group consisting of mono-lower alkyl 3-indolemethanephosphonates and di-lower alkyl 3- indolemethanephosphonates.
8. Diethyl 3-indolemethanephosphonate.
References Cited in the file of this patent UNITED STATES PATENTS 2,447,545 Snyder et a1. Aug.'24, 1948 2,847,442 Sallmann Aug. 12, 1958 2,849,454 Szmuszkovicz Aug. 26, 1958 UNITED STATES PATENT OFFICE CERTIFICATION OF CORRECTION Patent No. 2, 980 692 April 18 1961 Noel F, Albertson It is hereby certified that error appears in the above numbered patent requiring correction and that the saidLetters Patent should read as corrected below.
Column 1, lines 30 to 33 column 5, lines 4 to 7. and column 6, lines' 3 to 6, the right-hand portion of the formulas, each occurrence, should appear as shown below instead of as in the patent:
column 2, line 64, for "3 -diethylaminomethyl)" read 3(diethylaminomethyl) column l line 30, for "salt" read salts Signed and sealed this 26th day of September 1961 (SEAL) Attest:
ERNEST W. SWIDER DAVID L., LADD Atte'sting Officer Commissioner of Patents
Claims (1)
1. 3-INDOLEMETHANEPHOSPHONIC ACID, HAVING THE STRUCTURAL FORMULA
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US751155A US2980692A (en) | 1958-07-28 | 1958-07-28 | 3-indolemethanephosphonic acid and its salts and preparation thereof |
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US751155A US2980692A (en) | 1958-07-28 | 1958-07-28 | 3-indolemethanephosphonic acid and its salts and preparation thereof |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3198807A (en) * | 1961-07-25 | 1965-08-03 | Substitutes carboxamide indoles and indolines | |
US3260729A (en) * | 1957-09-30 | 1966-07-12 | Roussel Uclaf | Benzoate of 1-(6'-methoxy-3'-indolyl)-2-propylamine |
US3461120A (en) * | 1965-09-27 | 1969-08-12 | Sterling Drug Inc | N-((1-piperidyl)-lower-alkyl)-n-((3-,2-,and 1-indolyl)-lower-alkyl) amines |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2447545A (en) * | 1944-10-21 | 1948-08-24 | Merck & Co Inc | Synthesis of tryptophane and intermediates therefor |
US2847442A (en) * | 1954-03-05 | 1958-08-12 | Ciba Ltd | New compounds containing nitrogen and phosphorus |
US2849454A (en) * | 1957-06-27 | 1958-08-26 | Upjohn Co | Gamma (3-indolyl)-gamma-keto-propyl phosphonic acids |
-
1958
- 1958-07-28 US US751155A patent/US2980692A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2447545A (en) * | 1944-10-21 | 1948-08-24 | Merck & Co Inc | Synthesis of tryptophane and intermediates therefor |
US2847442A (en) * | 1954-03-05 | 1958-08-12 | Ciba Ltd | New compounds containing nitrogen and phosphorus |
US2849454A (en) * | 1957-06-27 | 1958-08-26 | Upjohn Co | Gamma (3-indolyl)-gamma-keto-propyl phosphonic acids |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3260729A (en) * | 1957-09-30 | 1966-07-12 | Roussel Uclaf | Benzoate of 1-(6'-methoxy-3'-indolyl)-2-propylamine |
US3198807A (en) * | 1961-07-25 | 1965-08-03 | Substitutes carboxamide indoles and indolines | |
US3415934A (en) * | 1961-07-25 | 1968-12-10 | Ile De France | Methods for the treatment of emesis |
US3496275A (en) * | 1961-07-25 | 1970-02-17 | Ile De France | Method of treatment of nervous tensions in mammals with certain substituted indoles and indolines |
US3461120A (en) * | 1965-09-27 | 1969-08-12 | Sterling Drug Inc | N-((1-piperidyl)-lower-alkyl)-n-((3-,2-,and 1-indolyl)-lower-alkyl) amines |
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