CN103553860A - Method for synthesizing sulfamide compounds - Google Patents

Method for synthesizing sulfamide compounds Download PDF

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CN103553860A
CN103553860A CN201310536289.4A CN201310536289A CN103553860A CN 103553860 A CN103553860 A CN 103553860A CN 201310536289 A CN201310536289 A CN 201310536289A CN 103553860 A CN103553860 A CN 103553860A
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杨雪飞
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TIANJIN HENGBIDA CHEMICAL COMPOSITE Co Ltd
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Abstract

The invention relates to a method for preparing sulfamide compounds. The method comprises the following steps: reacting a nitryl compound with sulfinic acid or salt thereof in the presence of a composite catalytic system of copper catalyst/organic borate; adding quaternary ammonium salt promoter to promote the reaction, so that the reaction time is remarkably shortened, and the sulfamide compounds can be prepared with high yield. The method has the remarkable advantages of high reaction yield, strong universality and the like, is low in reaction temperature and short in time, and has excellent industrial prospect and industrial enlargement value.

Description

A kind of synthetic method of sulfamide compound
Technical field
The preparation method who the present invention relates to the synthetic field of medicine sulfamide compound, relates more specifically to a kind of method that-sulfinate and nitro-compound react synthetic sulfamide compound under the effect of copper catalyst/organic boric acid ester composite catalyst system.
Background technology
Sulfamide compound, as a kind of very important pharmaceutical intermediate, be now widely used in the fields such as biological medicine, organic synthesis, and sulfonamide structure is also prevalent among pharmaceutical preparation.According to statistics in 2011, in the medicine of world rankings front 100, there is 10% applied medicine nearly need contain the minor structure of sulphonamide.Therefore, sulphonamide has become one of important construction unit of medicine and bioactive compounds.Traditional sulphonamide synthetic method adopts acyl chlorides to react with amine to realize the synthetic of sulphonamide, but adopts SULPHURYL CHLORIDE often to cause raw material to be difficult to the shortcoming of preserving, response stimulus is strong as raw material, makes the method leave hidden danger in amplificationization is produced.In addition, in precursor SULPHURYL CHLORIDE synthetic, usually adopt the electrophilic aromatic substitution reaction of (1) chlorsulfonic acid and the oxidation chlorination of (2) organosulfur compound, these reactions relate to harsh reaction conditions and poisonous reaction reagent etc. and have limited its application.As can be seen here, the synthetic method of developing a kind of high yield, sulfamide compound that universality is strong is the urgent difficult problem that vast organic chemistry, medicine study on the synthesis personnel face.
The existing many relevant reports of the synthetic method of relevant sulfamide compound or technique in prior art, for example:
Tang Xiaodong etc. (" Copper-catalyzed sulfonamides formation from sodiu m sulfinates and amines ", Chem.Commun, 2013,49, a kind of synthetic method of sulphonamide 6102-6104) is disclosed.Described method take-sulfinate and amine as raw material, to take oxygen or methyl-sulphoxide be oxygenant, under the effect of copper catalyst, through oxidative coupling reaction, prepares corresponding sulfonamide compounds.
J.Robb DeBergh etc. (" Synthesis of Aryl Sulfonamides via Palladium-Cat alyzed Chlorosulfonylation of Arylboronic Acids ", J.Am.Chem.Soc., 2013,135, a kind of preparation method of sulphonamide 10638-10641) is disclosed.Described method is that aryl boric acid chlorosulfonylation reaction occurs under palladium catalyst effect prepares sulfonyl chloride intermediate; and then generate corresponding sulphonamide with amine reaction in-situ; this reaction conditions is gentle, raw material is easy to get, but need to use expensive palladium catalytic reagent, is difficult to industrialization.
J.S.Yadav etc. (" Iodine-catalyzed ontermolecular hydroamination of vinyl arenes ", Tetrahedron letters, 2009,50,5351-5353) disclose a kind of synthetic method of sulphonamide, it adopts iodine is solvent as catalyzer, toluene, and benzsulfamide is reacted 2.5 hours with vinylbenzene at 110 ℃, can obtain 90% yield, but this temperature of reaction is high, alkene is easy to polymerization and cause by product to increase.
The Patent Application Publication of CN102675163A a kind of preparation method of sulphonamide.It is by-sulfinic acid or-sulfinate and nitro-compound under atmosphere of inert gases, and the copper compound of take has been realized the preparation of sulphonamide as catalyzer.But the method has specificity for the combination of catalyst/solvent, even if adopt identical copper compound catalyzer, and due to the difference of solvent all can inducing reaction property huge deviation, cause product yield difference huge, even cannot carry out, above-mentioned reason makes the method narrow application range, universality poor, is difficult to industrial applications.
Organoboron reagent is usually in the middle of the reaction for catalytic preparation of amide, for example: boric acid and aryl boric acid directly catalysis carboxylic acid and amine react synthesizing amide [referring to H.Charville, D.Jackson, G.Hodges and A.Whiting, Chem.Commun., 2010,46,1813 – 182].But these usually react long reaction time, condition is harsh.In addition, in prior art, yet there are no that organic borane reagent reacts with nitro-compound for catalysis-sulfinate and the relevant report of preparing sulphonamide.
The many defects that exist for prior art and the specificity feature of organic catalytic reaction, the present invention is intended to find one, and cost is low, yield is high, be suitable for the novel preparation method of the sulfamide compound of suitability for industrialized production, to meet vast medical synthetic work person's demand, and realize Economic concept green, environmental protection.
Summary of the invention
For many defects of above-mentioned existence, the inventor, after having paid a large amount of creative works, has developed a kind of novel preparation method of sulfamide compound through further investigation.Surprisingly, the present invention adopts composite catalyst system (copper catalyst/organoboron reagent composite catalyst system, "/" wherein represent " with " relation), and carry out suitable and rational processing parameter to select and obtained beyond thought technique effect.The method of the invention has the plurality of advantages such as reaction yield is high, cost is low, universality is good, has good industrialization prospect.
Particularly, the invention provides the preparation method of sulfamide compound shown in a kind of formula (I),
Figure BDA0000407386400000021
Described method comprises: under the composite catalyst system effect of copper catalyst/organic boric acid ester, formula (II) compound and formula (III) compound react in organic solvent,
Wherein, R 1, R 2be selected from independently of one another with substituting group or unsubstituted C 1-C 6alkyl, with substituting group or unsubstituted C 1-C 6alkoxyl group, with substituting group or unsubstituted C 5-C 12aryl or with substituting group or unsubstituted C 4-C 12heteroaryl; Described C 5-C 12aryl or C 4-C 12heteroaryl is phenyl, naphthyl, pyridyl, pyrryl, thienyl or furyl; Described substituting group is halogen, C 1-C 6alkyl, C 1-C 6alkoxyl group; Described substituting group is preferably halogen, methyl, ethyl, n-propyl, sec.-propyl, the tertiary butyl, methoxy or ethoxy;
M is H, NH 4 +or metallic cation; Be preferably H, NH 4 +, alkali metal cation or alkaline earth metal cation; More preferably H, NH 4+, Li +, Na +, K +, Ru +or Cs +.
In described method of the present invention, halogen atom refers to fluorine, chlorine, bromine or iodine atom.
In described method of the present invention, C 1-C 6alkyl refers to the alkyl with 1-6 carbon atom, and it can be straight or branched, and indefiniteness ground is such as can be methyl, ethyl, n-propyl, sec.-propyl, normal-butyl, sec-butyl, isobutyl-, the tertiary butyl, n-pentyl, isopentyl, n-hexyl etc.
In described method of the present invention, C 1-C 6alkoxyl group refers to " C defined above 1-C 6alkyl " group after being connected with O atom.
In described method of the present invention, organic solvent when formula (II) is reacted with (III) is not particularly limited, can be any conventional solvent using in organic synthesis field, for example can be to indefiniteness benzene, toluene, N-Methyl pyrrolidone (NMP), dimethyl sulfoxide (DMSO) (DMSO), dimethyl formamide (DMF), acetonitrile, methyl-phenoxide, dioxane, ethylene dichloride, methylene dichloride, trichloromethane, tetracol phenixin, normal hexane, tetrahydrofuran (THF) (THF), ether, methyl alcohol, ethanol, n-propyl alcohol, Virahol, butanols, amylalcohol, one or more in hexanol etc., be preferably toluene, N-Methyl pyrrolidone (NMP), dimethyl sulfoxide (DMSO) (DMSO), dimethyl formamide (DMF), acetonitrile, methyl-phenoxide, dioxane, tetrahydrofuran (THF), trichloromethane.
In described method of the present invention, described formula (II) is 1-2.5:1 with the mol ratio of formula (III) compound, this scope has comprised any sub-range scope wherein, as 1.1-2.4:1,1.2-2.3:1,1.3-2.2:1,1.4-2.1:1,1.5-2.0:1,1.6-1.9:1, also comprise any concrete point value wherein, exemplarily for example can be 1.1:1,1.2:1,1.4:1,1.6:1,1.8:1,2:1,2.2:1,2.4:1 or 2.5:1.
In described method of the present invention, described copper catalyst is elemental copper or copper compound, is preferably Cu, CuCl 2, CuCl, CuBr 2, CuBr, CuI 2, CuI, CuCO 3, Cu (OTf) 2, CuOAc or Cu (OAc) 2in any one.
In described method of the present invention, described organic boric acid ester is trimethyl borate, triethyl borate, trolamine boric acid ester, B (OCH 2cF 3) 3in any one.
In described method of the present invention, the mole dosage of described copper catalyst is (II) and (III) 0.5-5% of both integral molar quantities, this scope has comprised any sub-range scope wherein, as 1-4%, 2-3%, also comprise any concrete point value wherein, exemplarily for example can be (II) and 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5% or 5% of (III) both integral molar quantities.
In described method of the present invention, the mol ratio of described copper catalyst and organic boric acid ester is 1:1-2, for example, can be 1:1.1,1:1.2,1:1.3,1:1.4,1:1.5,1:1.6,1:1.7,1:1.8,1:1.9 or 1:2.0.
Preferably, reaction is carried out under atmosphere of inert gases, and described rare gas element is any one in nitrogen, argon gas.
More preferably, except using above-mentioned copper catalyst and organic boric acid ester, also can in reaction system, further add promotor, described promotor is quaternary ammonium salt, can be to indefiniteness any one in benzyltriethylammoinium chloride (TEBA), Tetrabutyl amonium bromide, tetrabutylammonium chloride, tri-n-octyl methyl ammonium chloride, Dodecyl trimethyl ammonium chloride, tetradecyl trimethyl ammonium chloride.When adding promotor, unexpectedly further shortened the reaction times.Wherein in mass, promotor can be 1-3:1 with the ratio of copper catalyst, as 1:1,1.5:1,2:1,2.5:1 or 3:1, and preferred 2-1:1.
In described method of the present invention, reaction times there is no special restriction, for example can determine the suitable reaction times by the residual per-cent of liquid chromatographic detection object product or raw material, it typically is 1-18 hour, is indefiniteness for example 1 hour, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 7 hours, 8 hours, 9 hours, 10 hours, 11 hours, 12 hours, 13 hours, 14 hours, 15 hours, 16 hours, 17 hours or 18 hours.
In described method of the present invention, temperature of reaction is 60-120 ℃, for example can be to indefiniteness 60 ℃, 70 ℃, 80 ℃, 90 ℃, 100 ℃, 110 ℃ or 120 ℃.
Reaction finishes, and obtains after crude product, can adopt conventional means to purify, for example, reaction system can be cooled to room temperature, cross that silica gel chromatographic column is separated, eluting solvent is removed in evaporation, vacuum-drying and obtain target sulphonamide product
The present invention is by using the composite catalyst system of copper catalyst/organic boric acid ester, and preferably further add promotor, and effectively make formula II and III compound react, thereby high yield prepare sulfamide compound, and have reaction temperature and, the plurality of advantages such as universality is good, there is good prospects for commercial application and marketable value.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail, but these exemplary embodiments not form any type of any restriction to real protection scope of the present invention.
Embodiment 1
In 100ml flask, add successively 60ml N-Methyl pyrrolidone, 8mmol oil of mirbane, and 10mmol is to methyl sodium benzene sulphinate, under heated and stirred, be incorporated as the 0.09mmol cuprous chloride of two kinds of reaction raw materials integral molar quantities 5% and the trimethyl borate of 0.09mmol, stirring reaction 10h under 80 ℃, nitrogen atmosphere, be cooled to after completion of the reaction room temperature, cross silica gel chromatographic column separation, evaporate and remove eluting solvent, vacuum-drying obtains target sulphonamide product, and yield is 95%.
1H-NMR(CDCl 3,300MHz)δ:2.41(s,3H),4.12(s,1H),6.70(d,2H),6.91(t,1H),7.18(d,2H),7.42(d,2H),7.81(d,2H)。
MS?m/z:247.09(M+1,100)。
Embodiment 2
Figure BDA0000407386400000052
In 100ml flask, add successively 50ml N-Methyl pyrrolidone, 10mmol to methoxy nitrobenzene, and 12mmol is to methyl sodium benzene sulphinate, under heated and stirred, be incorporated as 0.66mmol cuprous chloride and the 0.99mmol triethyl borate of two kinds of reaction raw materials integral molar quantities 3%, stirring reaction 10h under 100 ℃, nitrogen atmosphere, be cooled to after completion of the reaction room temperature, cross silica gel chromatographic column separation, evaporate and remove eluting solvent, vacuum-drying obtains target sulphonamide product, and yield is 92%.
1H-NMR(CDCl 3,300MHz)δ:2.40(s,3H),3.79(s,3H),4.09(s,1H),6.68(d,2H),6.97(d,2H),7.39(d,2H),7.76(d,2H)。
MS?m/z:277.10(M+1,100)。
Embodiment 3
Figure BDA0000407386400000061
In 100ml flask, add successively 75ml N-Methyl pyrrolidone, 12mmol to methoxy nitrobenzene, and 24mmol is to chlorine benzene sulfinic acid sodium salt, under heated and stirred, be incorporated as 1.44mmol cuprous chloride and the 2.88mmol trolamine boric acid ester of two kinds of reaction raw materials integral molar quantities 4%, stirring reaction 15h under 120 ℃, nitrogen atmosphere, be cooled to after completion of the reaction room temperature, cross silica gel chromatographic column separation, evaporate and remove eluting solvent, vacuum-drying obtains target sulphonamide product, and yield is 91%.
1H-NMR(CDCl 3,300MHz)δ:3.81(s,3H),4.05(s,1H),6.70(d,2H),7.02(d,2H),7.59(d,2H),7.78(d,2H)。
MS?m/z:297.06(M+1,100)。
Embodiment 4
Figure BDA0000407386400000062
In 100ml flask, once add 55ml N-Methyl pyrrolidone, 6mmol4-nitropyridine, and 9mmol is to methyl sodium benzene sulphinate, is incorporated as 0.3mmol cuprous chloride and the 0.6mmol B (OCH of two kinds of reaction raw materials integral molar quantities 2% under heated and stirred 2cF 3) 3, stirring reaction 12h under 110 ℃, nitrogen atmosphere, is cooled to after completion of the reaction room temperature, crosses that silica gel chromatographic column is separated, eluting solvent is removed in evaporation, and vacuum-drying obtains target sulphonamide product, and yield is 93%.
1H-NMR(CDCl 3,300MHz)δ:2.38(s,3H),4.06(s,1H),7.04(d,2H),7.43(d,2H),7.80(d,2H),8.51(d,2H)。
MS?m/z:248.11(M+1,100)。
Embodiment 5
In 100ml flask, once add 65ml N-Methyl pyrrolidone, 8mmol oil of mirbane, and 12mmol methyl-sulfinic acid sodium, under heated and stirred, be incorporated as 0.2mmol cuprous chloride and the 0.2mmol trimethyl borate of two kinds of reaction raw materials integral molar quantities 1%, stirring reaction 16h under 90 ℃, nitrogen atmosphere, be cooled to after completion of the reaction room temperature, cross silica gel chromatographic column separation, evaporate and remove eluting solvent, vacuum-drying obtains target sulphonamide product, and yield is 94%.
1H-NMR(CDCl 3,300MHz)δ:2.97(s,3H),4.07(s,1H),6.71(d,2H),6.85(t,1H),7.23(d,2H)。
MS?m/z:171.08(M+1,100)。
Embodiment 6-13
With the same way as of embodiment 1, carried out embodiment 6-13 respectively, difference part is to adopt different reaction solvents.Concrete outcome sees the following form 1.
Table 1. adopts the product yield under different solvents
Figure BDA0000407386400000071
Embodiment 14-23
With the same way as of embodiment 1, carried out embodiment 14-23 respectively, difference part is to adopt different catalyst system, and concrete outcome sees the following form 2.
Table 2. adopts the product yield under different copper catalysts
Figure BDA0000407386400000072
Figure BDA0000407386400000081
Embodiment 24-29
With the same way as of embodiment 1, carried out embodiment 24-29 respectively, difference part is also in reaction system, to have added different promotors, and wherein promotor and copper catalyst are that the mass ratio of cuprous chloride is distinguished as follows:
Embodiment 24 is 1:1; Embodiment 25 is 2:1; Embodiment 26 is 3:1; Embodiment 27 is 1.5:1; Embodiment 28 is 2.5:1; Embodiment 29 is 3:1.
Adopt gas-chromatography-liquid chromatography coupling assaying reaction yield, concrete outcome sees the following form 3.
Table 3. adopts the product yield under different promotors
Figure BDA0000407386400000082
As can be seen here:
Copper catalyst/organic boric acid ester catalyst system is applied to nitro-compound and reacts the reaction type of preparing sulphonamide with-sulfinate, through large quantity research, draw following result:
1,, from above-described embodiment 1-5, adopt copper catalyst, and while adding various organic boric acid ester, reaction has all obtained high yield (>91%), has confirmed the excellent catalytic performance of copper catalyst/organic boric acid ester system.
2, by above-mentioned table 1, can be found out, adopt this reaction of cuprous chloride/trimethyl borate catalysis, under differential responses solvent, react and all can carry out, and obtained suitable high yield, and yield reach as high as 93%;
3, by above-mentioned table 2, can be found out, when adopting different copper catalysts, product yield is all kept, and has confirmed that the catalysis that under the cooperation of organic boric acid ester various copper compounds or simple substance all can high yields prepares sulphonamide.
4, by above-mentioned table 3, can be found out, when adding various quaternary ammonium salt promotor in reaction system, not only improved yield, and obviously shortened the reaction times, the reaction times shortens at most half.
Therefore, method of the present invention compared with prior art, by the use of copper catalyst/organic boric acid ester catalyst system, not only makes reaction yield high, and makes various copper catalysts, the reaction solvent all can be practical, thereby has expanded the scope of application of reaction; In addition, by introducing quaternary ammonium salt promotor, shorten significantly the time of reaction, obtained beyond thought technique effect, for amplification or the suitability for industrialized production of sulfamide compound, there is very strong industrial prospect and economic benefit.Although organic catalytic reaction has certain not predictability, but the inventor has worked out the preparation method of a kind of high yield, sulfamide compound that universality is strong through a large amount of creative works, and produced obvious positively effect, there is research and using value significantly.
The purposes that should be appreciated that these embodiment only limits the scope of the invention for the present invention being described but not being intended to.In addition; also should understand; after having read technology contents of the present invention, those skilled in the art can make various changes, modification and/or modification to the present invention, within these all equivalent form of values fall within the protection domain that the application's appended claims limits equally.

Claims (10)

1. a preparation method for sulfamide compound shown in formula (I),
Described method comprises: under the composite catalyst system effect of copper catalyst/organic boric acid ester, formula (II) compound and formula (III) compound react in organic solvent,
Wherein, R 1, R 2be selected from independently of one another with substituting group or unsubstituted C 1-C 6alkyl, with substituting group or unsubstituted C 1-C 6alkoxyl group, with substituting group or unsubstituted C 5-C 12aryl or with substituting group or unsubstituted C 4-C 12heteroaryl.
2. the preparation method of sulfamide compound shown in a kind of formula (I) according to claim 1, is characterized in that: described C 5-C 12aryl or C 4-C 12heteroaryl is phenyl, naphthyl, pyridyl, pyrryl, thienyl or furyl; Described halogen atom refers to fluorine, chlorine, bromine or iodine atom.
3. according to the preparation method of sulfamide compound shown in a kind of formula (I) described in claim 1 or 2, it is characterized in that: described copper catalyst is elemental copper or copper compound.
4. according to the preparation method of sulfamide compound shown in a kind of formula (I) described in claim 1-3 any one, it is characterized in that: formula (II) is 1-2.5:1 with the mol ratio of formula (III) compound.
5. according to the preparation method of sulfamide compound shown in a kind of formula (I) described in claim 1-4 any one, it is characterized in that: the mole dosage of described copper catalyst is (II) and (III) 0.5-5% of both integral molar quantities; The mol ratio of described copper catalyst and organic boric acid ester is 1:1-2.
6. according to the preparation method of sulfamide compound shown in a kind of formula (I) described in claim 1-5 any one, it is characterized in that: described organic solvent is one or more in benzene, toluene, N-Methyl pyrrolidone, dimethyl sulfoxide (DMSO), dimethyl formamide, acetonitrile, methyl-phenoxide, dioxane, ethylene dichloride, methylene dichloride, trichloromethane, tetracol phenixin, normal hexane, tetrahydrofuran (THF), ether, methyl alcohol, ethanol, n-propyl alcohol, Virahol, butanols, amylalcohol, hexanol.
7. according to the preparation method of sulfamide compound shown in a kind of formula (I) described in claim 1-6 any one, it is characterized in that: described copper catalyst is Cu, CuCl 2, CuCl, CuBr 2, CuBr, CuI 2, CuI, CuCO 3, Cu (OTf) 2, CuOAc or Cu (OAc) 2in any one.
8. according to the preparation method of sulfamide compound shown in a kind of formula (I) described in claim 1-7 any one, it is characterized in that: described organic boric acid ester is trimethyl borate, triethyl borate, trolamine boric acid ester, B (OCH 2cF 3) 3in any one.
9. according to the preparation method of sulfamide compound shown in a kind of formula (I) described in claim 1-8 any one, it is characterized in that: except using above-mentioned copper catalyst and boric acid ester, also in reaction system, further add promotor, described promotor is quaternary ammonium salt.
10. the preparation method of sulfamide compound shown in a kind of formula (I) according to claim 9, is characterized in that: described promotor is any one in benzyltriethylammoinium chloride (TEBA), Tetrabutyl amonium bromide, tetrabutylammonium chloride, tri-n-octyl methyl ammonium chloride, Dodecyl trimethyl ammonium chloride, tetradecyl trimethyl ammonium chloride; Wherein in mass, promotor is 1-3:1 with the ratio of copper catalyst.
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Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN104628606A (en) * 2015-02-06 2015-05-20 王桦 Preparation method of sulfohydrazide compound
CN108440345A (en) * 2018-04-08 2018-08-24 西北师范大学 A kind of preparation method of sulfamide compound
CN110372463A (en) * 2019-07-12 2019-10-25 浙江大学 A kind of method of nitro-aromatic and boronic acid compounds coupling synthesis sulfonamide compounds
CN111170905A (en) * 2019-12-28 2020-05-19 台州学院 Synthetic method of sulfonamide compound
CN114057616A (en) * 2021-11-12 2022-02-18 温州大学 Method for synthesizing N-substituted benzene sulfonamide compound

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CN1432003A (en) * 2000-06-05 2003-07-23 Fmc有限公司 Process to prepare sulfonamides
CN102675163A (en) * 2012-05-23 2012-09-19 湘潭大学 Preparation method of sulfonamide

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US3934972A (en) * 1973-04-25 1976-01-27 Imperial Chemical Industries Limited Dyeing process
CN1159444A (en) * 1995-11-14 1997-09-17 赫彻斯特股份公司 Sulfuryl amino substituted benzoyl guanidine, preparation process and applications as medicine or diagnostic agent and the medicine containing same
CN1432003A (en) * 2000-06-05 2003-07-23 Fmc有限公司 Process to prepare sulfonamides
CN102675163A (en) * 2012-05-23 2012-09-19 湘潭大学 Preparation method of sulfonamide

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104628606A (en) * 2015-02-06 2015-05-20 王桦 Preparation method of sulfohydrazide compound
CN108440345A (en) * 2018-04-08 2018-08-24 西北师范大学 A kind of preparation method of sulfamide compound
CN108440345B (en) * 2018-04-08 2020-11-24 西北师范大学 Preparation method of sulfonamide compound
CN110372463A (en) * 2019-07-12 2019-10-25 浙江大学 A kind of method of nitro-aromatic and boronic acid compounds coupling synthesis sulfonamide compounds
CN111170905A (en) * 2019-12-28 2020-05-19 台州学院 Synthetic method of sulfonamide compound
CN111170905B (en) * 2019-12-28 2022-04-29 台州学院 Synthetic method of sulfonamide compound
CN114057616A (en) * 2021-11-12 2022-02-18 温州大学 Method for synthesizing N-substituted benzene sulfonamide compound

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