CN1039018A - N, the preparation method of N-(the inferior second triolefin of dibenzo) urea - Google Patents
N, the preparation method of N-(the inferior second triolefin of dibenzo) urea Download PDFInfo
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- CN1039018A CN1039018A CN88104004A CN88104004A CN1039018A CN 1039018 A CN1039018 A CN 1039018A CN 88104004 A CN88104004 A CN 88104004A CN 88104004 A CN88104004 A CN 88104004A CN 1039018 A CN1039018 A CN 1039018A
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Abstract
The present invention is preparation N, and the method for N-(the inferior hexatriene of dibenzo) urea is with corresponding N, and N-(the inferior hexatriene of dibenzo) amine and cyanic acid make through single step reaction.
Description
The present invention relates to N, the inferior hexatriene of N-(dibenzo) preparation method of urea, particularly 1,5-dibenzo (b, f) azepine-5-carboxamide is characterized in that corresponding N, the inferior hexatriene of N-(dibenzo) amine, particularly 1,5-dibenzo (b, f) azepines (iminostilbene) reacts with cyanic acid.
1,5-dibenzo (b, f) azepine-5-carboxamide is commonly referred to as the carbamyl azepines, normally press US-PS 2 948 718 usefulness iminostilbenes and phosgene effect generation 1 as the active ingredient of medicament, 5-dibenzo (b, f) azepines-5-formyl chloride is more further with ammonia effect preparation.By the described method of more recent DE-Al2307174 is reaction product 1 with imino-and isocyanic acid ethanoyl ester, 5-dibenzo (b, f) azepines-5-(N-ethanoyl) methane amide carries out the hydrolysis of alkali formula.These known methods all have significant disadvantages, they must be divided into two the step carry out.Press the OS-PS method, the first step needs the hypertoxicity phosgene of equimolar amount again.
Therefore, the objective of the invention is to study a kind of manufacture method, this method only needs single step reaction just can directly obtain 1, and 5-dibenzo (1,5) azepine-5-carboxamide is to solve so far open question still.
The terms of settlement that the present invention proposes, as far as is known imido grpup stilbene and isocyanate reaction do not generate corresponding 1,5-dibenzo (b, f) azepines-5-(N-alkyl) methane amide (DE-Al 2307174), N, the reaction in benzene of N-diaryl-amine and sodium-chlor and trifluoroacetic acid can not be used for N, N-(benzo Aden diene)-with N, N-(dibenzo Aden diene)-amine, as indoles and carbazole (Chem. and Ind.1965, pages 1428-9)
Of the present inventionly normally produce with the method for introducing the 5-formamyl by the acid of pyrolysis cyanogen urea with cyanic acid, with silver or copper contact with oxygen oxidation methane amide, with the solution of its salt of acid treatment (preferably potassium cyanate or Zassol) with or suspension.The cyanic acid of free state is unsettled, and it participates in many polyreactions and self-condensation reaction, can also add water, alcohol, amine etc. rapidly, but its solution in the organic solvent that is fit to is sufficiently stable for the objective of the invention is.
Therefore reaction of the present invention is preferably carried out in organic solvent, promptly in organic solvent or ORGANIC SOLVENT MIXTURES, react, cyanic acid preferably is blown into reaction with gaseous state, preferably the rare gas element with nitrogen, argon and so on is blown into, or with its salts solution of acid treatment and/or suspension to dissociate cyanic acid, used salt is Zassol or potassium cyanate preferably.
The organic solvent that is fit to is that those and isocyanic acid do not react or with only reaction slowly takes place isocyanic acid, the unwanted intermediate of its generation does not influence the solvent that the present invention reacts, for example, some following solvents are the solvents that are fit to: aromatic hydrocarbons or fragrant aliphatic hydrocarbon, for example benzene or toluene; The halogenated aliphatic compound, for example 1, the 2-methylene dichloride; Aliphatic carboxylic acid and fatty ester thereof, for example lower paraffin hydrocarbons carboxylic acid (as acetate) or lower paraffin hydrocarbons carboxylic acid lower alkyl esters (as ethyl acetate) and aliphatic ether, ether, 1 for example, 4-dioxane, tetrahydrofuran (THF) etc. and their mixture.
Because the same water of cyanic acid, alcohol, amine etc. carry out unwanted side reaction, so reaction of the present invention should be carried out under the inert condition basically proton being, promptly in the organic solvent of anhydrous, pure, amine basically, carry out, also to exclude water vapour simultaneously.But when mixture reacts when separating the addition product that forms is can exempt these preventive measures fully.
The needed cyanic acid of reaction of the present invention must be used and N at least, the inferior hexatriene of N-(dibenzo) the equimolar amount of amine.Yet, yield is preferably arranged as need; Then with about 1.05-about 2.5 times of molar weights, the cyanic acid of the about 2.25 times of molar weights of about 1.25-(the about 2 times of molar weights of for example about 1.3-) preferably, promptly use about 150%, for example excessive about 30%-about 100% of the about 125%(of about 25%-preferably of excessive about 5%-) cyanic acid.
From its salt free cyano acid, be best especially preferred embodiment of the present invention, swim out of from cyanic acid suiting usually from the salt of cyanic acid with the protonic acid that enough acid intensities are arranged.For example Xia Mian acid is fit to: ore deposit acid, example hydrochloric acid, sulfuric acid; Organic sulfonic acid is as C
1-C
17Alkyl sulfonic acid or (when needing) halo-or C
1-C
4The Phenylsulfonic acid that alkyl replaces is as methylsulfonic acid, ethyl sulfonic acid, Phenylsulfonic acid, tosic acid or to bromo-benzene sulfonic acid; Organic carboxyl acid, its acid intensity in solvent for use is suitable with formic acid at least, as 2-halo, 2,2-dihalo, 2,2,2-three halo C
2-C
7Alkanoic acid (as trichoroacetic acid(TCA)).
N, the inferior hexatriene of N-(dibenzo) reaction of amine and cyanic acid is spontaneous generation, and slight exothermic reaction is arranged.Reaction parameter is not the crux problem, for example, reaction can homogeneous phase or heterogeneous (best) under in about 0 ℃-Yue 120 ℃ temperature range, carry out.But react available mitigation heating and/or acceleration and raising speed of response in the presence of acidic medium.Thereby reaction preferably in room temperature (promptly about 20 ℃) to about 100 ℃ temperature range with in the presence of acidizer, carry out.The latter's participation has been katalysis, acid with catalytic amount on the principle is enough, 1 mole of N substantially, the inferior hexatriene of N-(dibenzo) the about 0.01-0.15 equivalent of amine, for example about 0.04-about 0.05 normal acidizer is fully enough, have only with the obvious different polyhydric acid of acidity and be necessary just to note that having acid-salt under the situation of inhomogeneous reaction is precipitated out, and has hindered the effect of number acid.For example when using sulfuric acid, can make cyanic acid dissociate out and react heterogeneous and carry out as the acid of using from its a kind of salt, just be necessary with every mole of N, the inferior hexatriene of N-(dibenzo) amine reaches the sulfuric acid of 1.5 molar equivalents (about 1.4 molar equivalents of for example about 1.05-), be equivalent to about 0.7 mole of about 0.525-, promptly about 5%-about 40% is excessive.Clearly, the catalysis acidizer can N, the inferior hexatriene of N-(dibenzo) form of ammonium salt exists or adds.
The acidizer that is fit to has: be the above-mentioned protonic acid of free cyano acid; Aliphatic carboxylic acid such as C
1-C
7Alkanoic acid (as acetate), when particularly they are also simultaneously as solvent, if the acid of using cyanic acid wherein from its a kind of salt, to dissociate out, usually use less excessive be useful, i.e. excessive by about 0.5%-about 10%, for example acid that is used for free cyano acid of about 1%-5%, but as use sulfuric acid, for above-mentioned reasons, preferably use the excessive of about 5%-40%, for example about 32% is excessive.
In an optimum implementation, at N, the inferior hexatriene of N-(dibenzo) amine, imido grpup stilbene and wait molar equivalent at least particularly, in the suspension of Zassol in toluene of the about 2.25 times of molar weights of particularly about 1.75-(for example 2 times of molar weights), under about 20 ℃-30 ℃ (for example room temperature is to about 25 ℃), every mole of Zassol adds the trichoroacetic acid(TCA) of about 1.005-about 1.5 moles (for example 1.02 moles), be the about 5%(of excessive about 0.5%-for example excessive about 2%) trichoroacetic acid(TCA), with whole mixture heating up (as needs, to about 40 ℃-Yue 80 ℃ (for example to about 50 ℃-65 ℃)); Perhaps at N, the inferior hexatriene of N-(dibenzo) sulfuric acid (being equivalent to) of about 1.40 molar equivalents of the about 1.05-of adding in amine, the particularly suspension of imido grpup stilbene in acetate from about 0.525 mole to 0.7 mole, be the sulfuric acid of excessive about 5%-about 40%, and then add at least and N, the inferior hexatriene of N-(dibenzo) Zassol of amine equimolar amount, for example every mole of amine is from the Zassol of about 1.25-about 1.75 moles (for example about 1.60 moles), is reflected under the about 10 ℃-Yue 120 ℃ temperature to carry out; Perhaps in the suspension of ethyl acetate, add 1.02-1.40 times of molar weight (for example about 1.05 times) at sodium isocyanate, be the hydrogenchloride of 1.04-1.06 times of molar weight, promptly excessive in a small amount, 2%-10% excessive (for example about 5% is excessive) preferably, be the excessive hydrogenchloride of 4%-6%, and then be added to N many and used Zassol equimolar amount, the inferior hexatriene of N-(dibenzo) amine, for example every mole of Zassol is lower than about 50% mole of about 5%-, for example about 0.6-0.9 mole, for example about 0.75 mole imido grpup stilbene, reaction is preferably carried out under about 0 ℃-Yue 80 ℃ temperature, for example after adding amine with mixture heating up to about 40 ℃-70 ℃.
In another optimum implementation, in N, the inferior hexatriene of N-(dibenzo) amine, particularly imido grpup stilbene add equivalent at least in the suspension of acetate, the about 1.75 times of molar weights of for example about 1.25-, 1.4-1.6 times of molar weight preferably, promptly for example about 25%-is about 75%, the cyanic acid that preferably about 40%-about 60% is excessive, and, be heated to about 25 ℃-50 ℃ in case of necessity with whole mixture heating up; Perhaps at N, the inferior hexatriene of N-(dibenzo) amine, particularly the imido grpup stilbene is in toluene, dimethylbenzene, 1, suspension in 1-methylene dichloride or the ethyl acetate, at first add the about 0.15 times of molar weight of about 0.01-, 0.01-0.12 times of molar weight for example, about 15% mole of promptly about 1%-, the hydrogenchloride of for example about 1%-12% mole, and then add and to wait molar equivalent at least, the about 1.75 times of molar weights of for example about 1.25-, the about 1.6 times of molar weights of preferably about 1.4-, promptly about 25%-is about 75%, the cyanic acid that preferably about 40%-about 60% is excessive, and with whole mixture heating up, when needing, be heated to about 50 ℃-125 ℃, for example to about 75 ℃-Yue 100 ℃.In the method for another change, be at N, the inferior hexatriene of N-(dibenzo) in the suspension of amine and one acid salt mixture, the preferably about 0.85-about 0.95 of the about 0.96(of for example about 0.8-) the imido grpup stilbene of mol ratio and the about 0.2(of about 0.04-0.05-0.15 preferably) in the suspension of imido grpup hydrochloride (mol ratio=1 always) mixture of mol ratio, add the cyanic acid that waits molar equivalent at least, for example about 1.25-1.75 times of molar weight (preferably about 1.4-1.6 times of molar weight), the preferably about 40%-60% of the about 75%(of promptly for example about 25%-) excessive cyanic acid, and with whole mixture heating up, when needing, be heated to about 60 ℃-Yue 100 ℃.
Now the present invention is described in detail with each following embodiment.Used temperature is degree centigrade in the example.
Embodiment 1: the 723g trichoroacetic acid(TCA) is dissolved in 600ml toluene, lasts 1 1/2 hours.This solution is added 407g iminostilbene and 290g Zassol in the suspension of 600ml benzene, cools off it, with temperature maintenance at 25 ℃.
Whole mixture 25 ℃ of reactions 1/2 hour, 50 ℃ of reactions 1 hour, is slowly added 1300ml water then.Then mixture is cooled to 20 ℃ and filter out product, with toluene and water washing, 85-90 ℃ of following vacuum-drying.Obtain 475g formamyl azepines.
Embodiment 2: 25g imido grpup stilbene is suspended in the 180ml acetate, slowly adds the sulfuric acid of 14g 96% again.Under 30 ℃, the 13.5g Zassol is divided into several parts and adds mixture, fully stir simultaneously.
Under 30 ℃, whole mixture was stirred 3 hours, leach product,,, obtain 29.5g formamyl azepines through 80 ℃ of following vacuum-dryings successively with acetate and water washing.
Embodiment 3: the 68g Zassol is suspended in the 1000ml ethyl acetate, imports the 40g hydrogen chloride gas under stirring at room.After 4 hours, the sodium-chlor that forms is leached, in limpid filtrate, add iminostilbene 155g.Reaction mixture remained on 50 ℃ of following 4-5 hours, was cooled to 0 ℃, leached product, and with the washing of a small amount of ethyl acetate, 80 ℃ of vacuum-dryings obtain 177g formamyl azepines.
Embodiment 4: 17.4g iminostilbene and 2.3g iminostilbene hydrochloride are suspended in the 250ml toluene, suspension is heated to 80 ℃, in nitrogen gas stream 6.5g monomer cyanic acid is imported in 1 1/2 hours process.Whole mixture is continued heating 1/2 hour again at 100 ℃.
After being chilled to 5 ℃, leach product, wash four times with cold toluene, 60 ℃ of vacuum-dryings obtain 18.5g carbamyl azepines.
Embodiment 5: 17.4g iminostilbene and 2.3g iminostilbene hydrochloride are suspended in the 250ml dimethylbenzene (isomer mixture), in nitrogen gas stream 6.5g monomer cyanic acid are imported under 20 ℃, then whole mixture was reacted 4 hours down at 30 ℃.
Then mixture is chilled to 0 ℃, leaches product, to do toluene wash, 80 ℃ of vacuum-dryings obtain 22.1g carbamyl azepines.
Embodiment 6: the 19.3g iminostilbene is suspended in 200ml 1, the 2-ethylene dichloride.Under 25 ℃, at first import 4.5g hydrogenchloride, import 6.5g gaseous state cyanic acid (in nitrogen gas stream) then.When the importing of gas is 5 hours and merotomize and carry out.Again with whole mixture reaction 1 hour, filter out product then, with 1, the washing of 2-ethylene dichloride washes with water more thereupon.
After 60 ℃ of vacuum-drying, obtain 16.0g formamyl azepines.
The a collection of product of handling with similar approach is finished after evaporation concentration in reaction, and residue is with cold benzene lixiviate and filter, and after usefulness toluene and the water washing, 60 ℃ of following vacuum-dryings, obtains 22.5g formamyl azepines.
Embodiment 7: under 20 ℃ the 29.0g iminostilbene is suspended in the 150ml ethyl acetate.To wherein importing 0.6g hydrogenchloride earlier, import 9.7g gaseous state cyanic acid (in nitrogen gas stream) again.
After stirring 15 hours under 20 ℃, leach product, with the washing of second vinegar ethyl ester and in 60 ℃ of vacuum-dryings, obtain formamyl azepines 32.0g.
Another similar test under 50 ℃ of temperature of reaction obtains formamyl azepines 29.4g.
Embodiment 8: the 19.3g iminostilbene is suspended in the 200ml ethyl acetate, adds 1.0ml sulfuric acid (98%).
Under 25 ℃, import 6.5g monomer cyanic acid (in nitrogen gas stream).Whole mixture placement is spent the night, and evaporation concentration is extremely done in a vacuum then.Residue is dissolved in toluene.Filter the back with toluene and water washing,, obtain 19.7g formamyl azepines in 80 ℃ of following vacuum-dryings.
Embodiment 9: 19.3g iminostilbene and 100ml acetate are heated to 45 ℃.In 1 1/2 hours process, 6.5g monomer cyanic acid (in nitrogen gas stream) is imported, and whole mixture was reacted 12 hours at 40 ℃.After being cooled to 15 ℃, filter, with the acetate washing, dry in 60 ℃ vacuum.
Resulting thick product is recrystallization in methanol (7: 3), obtains carbamyl azepines 19.1g.
Embodiment 10: the 29.0g iminostilbene is heated to 45 ℃ in acetate, in 1 1/2 hours process 9.7g monomer cyanic acid (in nitrogen gas stream) is imported.Then whole mixture was reacted 2 hours down at 40 ℃, reacted 12 hours down at 20 ℃ again.
After adding 15ml water, whole mixture is as cold as 0 ℃.Leach product after 1 hour, use 15ml acetate and water washing 2 times, obtain thick product,, obtain 29.1g formamyl azepines thick product recrystallization in methanol (7: 3).
Claims (27)
1, a kind of preparation N, the method for N-(the inferior hexatriene of dibenzo) urea is characterized in that the N with correspondence, N-(the inferior hexatriene of dibenzo) amine and cyanic acid react.
2, in accordance with the method for claim 1, it is characterized in that being reflected in organic solvent or the ORGANIC SOLVENT MIXTURES, in the presence of acidizer, carry out.
3, in accordance with the method for claim 2, it is characterized in that used organic solvent is aliphatic carboxylic acid or its aliphatic ester, aromatic hydrocarbon or fragrant fat hydrocarbon, halogenated aliphatic compound or aliphatic ether.
4,, it is characterized in that used organic solvent is toluene, dimethylbenzene, 1,2-ethylene dichloride, acetate or ethyl acetate according to claim 2 or 3 described methods.
5, according to claim 1 or 4 described methods, cyanic acid wherein is that solution and/or the suspension of cyanate in organic solvent is carried out acid treatment and dissociates, and need not separate in use.
6, according to claim 2 or 3 described methods, cyanic acid wherein is that solution and/or the suspension of cyanate in organic solvent is carried out acid treatment and dissociates, and need not separate in use.
7, according to claim 2,3 and 6 described methods, wherein used organic solvent be acetate, ethyl acetate or toluene.
8, according to each described method of claim 2 to 4, wherein used acidizer is ore deposit acid, organic sulfonic acid, aliphatic carboxylic acid or 2-, 2,2-two-or 2,2,2-three halos-C
2-C
7Alkanoic acid.
9, according to each described method of claim 2 to 5, wherein used acidizer is ore deposit acid, organic sulfonic acid or 2-, 2, and 2-two or 2,2,2-three halos-C
2-C
7Alkanoic acid.
10, according to claim 2,3,6 and 7 each described methods, wherein used acidizer is ore deposit acid.
11, according to claim 4,5,8 and 9 each described methods, wherein used acidizer is trichoroacetic acid(TCA), hydrochloric acid or sulfuric acid.
12, according to claim 2,3,6 and 7 each described methods, wherein used acidizer is hydrochloric acid or sulfuric acid.
13, according to claim 2,3,6 and 7 each described methods, wherein used acidizer is a trichoroacetic acid(TCA).
14, according to claim 2 to 4 and 8 each described methods, wherein acetate is as acidizer, simultaneously also as solvent.
15,, it is characterized in that reacting and be approximately ℃ to carry out to about 120 ℃ temperature range according to claim 1,45,8,9,11 and 14.
16, according to claim 2,3,6,7,9,11 and 13, each described method, it is characterized in that reacting is to carry out in about 0 ℃-Yue 120 ℃ temperature range.
17, according to claim 1 to 7 and the described method of 9-13, it is characterized in that down about 0.5%-about 5% excessive trichoroacetic acid(TCA) being added N N at about 20 ℃-Yue 30 ℃, the inferior hexatriene of N-(dibenzo) amine and the suspension of the about 2.25 times of molar weight Zassols of about 1.75-in toluene, and with extremely about 40 ℃-Yue 80 ℃ of whole mixture heating up.
18, according to claim 2,3,6,7,10,12 and 13 each described preparations 1,5-dibenzo (b, f) method of methane amide, it is characterized in that about 2% excessive trichoroacetic acid(TCA) being added to about 25 ℃ temperature in the suspension that the Zassol of iminostilbene and two times of molar weights forms in room temperature, then with whole mixture heating up to about 50 ℃-Yue 65 ℃.
19, according to claim 2,3,6,7,10 and 12 each preparations 1, the method for 5-dibenzo (b, f) methane amide, it is characterized in that in the ethyl acetate suspension of Zassol, importing excessive in a small amount hydrogenchloride, be added to iminostilbene many and used Zassol equimolar amount then.
20, according to claim 1 to 7 and each described method of 9-12, it is characterized in that about 2%-about 10% excessive hydrogenchloride is imported the suspension of sodium isocyanate in ethyl acetate, the N that adds the about 0.9 times of used Zassol molar weight of about 0.6-then, the inferior hexatriene of N-(dibenzo) amine is with extremely about 40 ℃-Yue 70 ℃ of whole mixture heating up.
21, according to claim 2,3,6,7,10 and 12 each described preparations 1,5-dibenzo (b, f) method of azepine-5-carboxamide, it is characterized in that under about 0 ℃-+80 ℃ temperature, about 5% excessive hydrogenchloride being imported the suspension of sodium isocyanate in ethyl acetate, be added to iminostilbene many and used Zassol equimolar amount then.
22, according to claim 2,3,6,7,10 and 12 each described preparations 1,5-dibenzo (b, f) method of azepine-5-carboxamide, it is characterized in that under the temperature of about+10 ℃-Yue+120 ℃, the sulfuric acid of about 40% molar excess of about 5%-is added the suspension of iminostilbene in acetate, add at least sodium isocyanate then with used iminostilbene equimolar amount.
23, according to claim 1 to 7 and 9 to 12 each described methods, it is characterized in that about 5%-about 40% excessive sulfuric acid is added N, the inferior hexatriene of N-(dibenzo) suspension of amine in acetate, every mole of amine adds about 1.25 moles-1.75 moles sodium isocyanate more then.
24, according to claim 2,3,6,7,10 and 12 each described preparations 1,5-dibenzo (b, f) azepine-5-carboxamide, it is characterized in that under about+10 ℃-+120 ℃, about 5%-about 40% excessive sulfuric acid is added the suspension of iminostilbene in acetate, and every mole of iminostilbene adds about 1.6 moles sodium isocyanate more then.
25, according to claim 1 to 4,7,8 or 14 each described methods is characterized in that about 25%-about 75% excessive cyanic acid is imported N the inferior hexatriene of N-(dibenzo) suspension of amine in acetate.
26, according to claim 1 to 4 and 7 to 12 each described methods, it is characterized in that earlier will the about 15%(mole of about 1%-) hydrogenchloride and then the cyanic acid that about 25%-75% is excessive import N, the inferior hexatriene of N-(dibenzo) amine is in toluene, dimethylbenzene, 1, in the suspension of 2-methylene dichloride or ethyl acetate.
27, according to claim 1 to 4 and 7 to 12 each described methods, it is characterized in that the cyanic acid that about 25%-about 75% is excessive imports the N of about 0.96 mol ratio of about 0.8-, the inferior hexatriene of N-(dibenzo) the iminostilbene hydrochloride (always mol ratio is 1) of amine and about 0.04-0.2 mol ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88104004A CN1038128C (en) | 1987-01-27 | 1988-06-30 | Process for manufacture of N,N-(dibenzohexatrienylene) ureas |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH27687 | 1987-01-27 | ||
| CN88104004A CN1038128C (en) | 1987-01-27 | 1988-06-30 | Process for manufacture of N,N-(dibenzohexatrienylene) ureas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1039018A true CN1039018A (en) | 1990-01-24 |
| CN1038128C CN1038128C (en) | 1998-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN88104004A Expired - Lifetime CN1038128C (en) | 1987-01-27 | 1988-06-30 | Process for manufacture of N,N-(dibenzohexatrienylene) ureas |
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| CN (1) | CN1038128C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2948718A (en) * | 1960-08-09 | New n-heterocyclic compounds | ||
| JPS5681565A (en) * | 1979-10-30 | 1981-07-03 | Ciba Geigy Ag | Manufacture of nnheterocyclic compound |
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