WO2010104027A1 - チアゾール誘導体およびその製造方法 - Google Patents
チアゾール誘導体およびその製造方法 Download PDFInfo
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- WO2010104027A1 WO2010104027A1 PCT/JP2010/053765 JP2010053765W WO2010104027A1 WO 2010104027 A1 WO2010104027 A1 WO 2010104027A1 JP 2010053765 W JP2010053765 W JP 2010053765W WO 2010104027 A1 WO2010104027 A1 WO 2010104027A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
- C07D277/08—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
- C07D277/12—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D277/18—Nitrogen atoms
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
- C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
- C07D277/20—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D277/32—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D277/38—Nitrogen atoms
- C07D277/42—Amino or imino radicals substituted by hydrocarbon or substituted hydrocarbon radicals
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
- C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
- C07D417/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings directly linked by a ring-member-to-ring-member bond
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
- C07D417/14—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing three or more hetero rings
Definitions
- the present invention relates to a thiazole derivative and a method for producing the same. More specifically, the present invention relates to a method for producing a pyridylthiazole compound or a dihydrothiazole compound in a high yield, at a low cost, simply and selectively.
- Thiazole derivatives are useful compounds as functional compounds (or synthetic intermediates) such as agricultural chemicals (insecticides, etc.), pharmaceuticals, fungicides, dyes, electronic materials, and the like.
- functional compounds or synthetic intermediates
- such as agricultural chemicals (insecticides, etc.), pharmaceuticals, fungicides, dyes, electronic materials, and the like For example, compounds using thiazole skeleton as interleukin 6 production inhibitors, bone resorption inhibitors, anti-osteoporosis agents (Patent Document 1), compounds used as osteogenesis promoters (Patent Document 2), protein kinase C Those used as inhibitors (Patent Document 3), those used as agricultural chemical intermediates (Patent Document 4), and those used as neuropeptide Y antagonists (Patent Document 5).
- Patent Document 3 A method in which a poor solvent is added after the reaction, followed by cooling precipitation (Patent Document 3), a method in which difluorophenacyl bromide and cyanothioacetamide are mixed and heated in water (Patent Document 4), ⁇ -acetonaphthone and thiourea, For example, tetrabutylammonium bromide is mixed in ethyl acetate, and bromine is added dropwise to react therewith (Patent Document 6). These methods leave room for improvement, such as the use of bromine with an irritating odor and the need to procure special reagents.
- a pyridylthiazole compound which is one of thiazole derivatives, is useful as a fungicide composition, and there is the following document (Patent Document 7) for its production method.
- Patent Document 7 2,6-dibromopyridine is treated with alkyllithium and N, N-dimethylacetamide is added. This is brominated with a brominating agent in the presence of an acid, and then reacted with thioacetamide, and finally, a target pyridylthiazole compound is obtained by a coupling reaction with an alkyl halogen.
- This process has multi-steps, and there is a problem in that the operation method is somewhat complicated.
- dihydrothiazole As a preparation method of dihydrothiazole (referred to as thiazoline in IUPAC.
- dihydrothiazole is used in order to clarify the difference from thiazole) as one of thiazole derivatives, for example, methyl 2- (difluoromethyl) -5 -(((2-chloroethyl) amino) carbonyl) -4- (2-methylpropyl) -6-trifluoromethyl) -3-pyridinecarboxylate and phosphorous pentasulfide are mixed and heated to degas.
- Patent Document 8 A method (Patent Document 8) has been proposed. This method requires a special starting material in order to obtain a 4,5 dihydrothiazole compound having a pyridyl group at the 2-position.
- thiazole derivatives are very useful as intermediates for functional materials such as pharmaceutical compositions, dyes, and electronic materials.
- functional materials such as pharmaceutical compositions, dyes, and electronic materials.
- an object of the present invention is to propose a simplified manufacturing method using readily available raw materials.
- thioformamide was allowed to act via thioamide dianion. It has been found that thiazole or dihydrothiazole can be selectively synthesized.
- the present invention is represented by the general formula (I), which comprises adding a strong base to the thioamide represented by the following general formula (II) and then reacting the thioformamide represented by the general formula (III).
- the present invention relates to a method for producing a thiazole derivative.
- R 1 represents a group selected from a branched or cyclic alkyl group having 3 to 12 carbon atoms, an aryl group, and a heteroaromatic group.
- Hydroxy, lower alkyl, lower alkoxy, halo or lower alkyl may be substituted with one or more substituents.
- R 2 represents an aryl group which may be substituted with one or more substituents selected from halogen, hydroxy, lower alkyl, lower alkoxy and halo-lower alkyl, or halogen, hydroxy, lower alkyl, lower alkoxy, halo
- a pyridyl group optionally substituted with one or more substituents selected from lower alkyl is shown.
- R 3 and R 4 are the same or different and each is a group selected from a linear, branched or cyclic alkyl group having 1 to 12 carbon atoms, an aryl group, and a heteroaromatic group (provided that each group further includes Optionally substituted with one or more substituents selected from halogen, hydroxy, lower alkyl, lower alkoxy, halo lower alkyl.), Or R 3 and R 4 together with the nitrogen atom to which they are attached.
- a 5- to 7-membered heterocyclic ring, Y is a hydrogen atom or Indicates.
- R 2 is an aryl group
- dihydrothiazole represented by the following general formula (IV) can be selectively obtained
- R 2 is a pyridyl group
- thiazole represented by the following general formula (VI) can be selectively obtained. Is a feature.
- R 1 in the above formula is the same as the group shown in the general formula (I) and the general formula (II), and Y is the same as the group shown in the general formula (I).
- the strong base added to the thioamide represented by the general formula (II) includes n-butyllithium, lithium diisopropylamide, sodium hydride, potassium hydride, potassium t-butoxide, calcium hydride, sodium hydroxide, sodium Examples include amides. These strong bases act on the carbon next to the thioamide nitrogen atom to abstract hydrogen and form a thioamide dianion. As the strong base, n-butyllithium is preferably used.
- dihydrothiazole represented by the general formula (IV) is a completely new compound in which an amino group is bonded to the 5-position of the thiazoline ring.
- Thiazoline is known as an intermediate for pharmaceuticals and agricultural chemicals.
- amino group and phenyl group are bonded to each other instead of the conventional hydrogen atom to form asymmetric carbon at positions 4 and 5. It is possible to search for new possibilities for.
- R 1 is the same as the group represented by the general formula (I).
- R 5 and R 6 are the same or different and each is a group selected from a linear, branched or cyclic alkyl group having 1 to 12 carbon atoms, an aryl group, and a heteroaromatic group (provided that each group further includes And may be substituted with one or more substituents selected from halogen, hydroxy, lower alkyl, lower alkoxy and halo-lower alkyl.
- At least one of R 5 and R 6 is halogen, hydroxy, lower An aryl group optionally substituted with one or more substituents selected from alkyl, lower alkoxy, halo lower alkyl, or one or more substituents selected from halogen, hydroxy, lower alkyl, lower alkoxy, halo lower alkyl
- the heteroaromatic group which may be substituted by is shown.
- the thiazole derivative represented by the general formula (V) has strong fluorescence, particularly when R 5 and R 6 are aryl groups, that is, when the 5-position of the thiazole ring is a diarylamino group. It is a compound that can be developed into an electron transport layer or the like in electroluminescence (abbreviated as “EL”).
- the method for producing a thiazole derivative of the present invention can be easily produced from easily available and inexpensive raw materials without going through a complicated synthesis route, the synthesis cost can be reduced.
- the substituent of thioamide for the synthesized product a product can be selectively obtained, and a completely new compound that has never been obtained can be easily obtained. Contributes greatly to the creation of useful new compounds.
- FIG. 1 is a diagram showing a fluorescence spectrum of an example of a thiazole derivative of the present invention. (Example 6)
- the present invention is characterized by adding a strong base to thioamide and then reacting with thioformamide.
- reaction formula (a) As a method for synthesizing this thioamide, the following reaction formula (a) can be used as an example.
- R 1 in the formula represents a group selected from a branched or cyclic alkyl group having 3 to 12 carbon atoms, an aryl group, and a heteroaromatic group, and each of these groups is further halogen, hydroxy, lower alkyl, lower alkoxy , May be substituted with one or more substituents selected from halo-lower alkyl.
- branched alkyl groups include isopropyl, isobutyl, t-butyl, etc.
- examples of cyclic alkyl groups include cyclopropyl, cyclohexyl, etc.
- examples of aryl groups include heteroaromatic groups such as benzyl, toluyl, xylyl, etc. Includes pyridyl, furyl, thienyl and the like. These are preferable because of the high yield in forming a thioamide dianion by reaction with a strong base.
- R 2 in the formula represents an aryl group which may be substituted with one or more substituents or a pyridyl group which may be substituted with one or more substituents. More specifically, each is substituted with one or two groups selected from a halogen atom, a hydroxyl group, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, and an alkoxycarbonyl group having 1 to 6 carbon atoms.
- the reaction formula (a) is a conventionally known method for synthesizing a thioamide that is a starting material of the present invention.
- the feature of this method is that any raw material (compound on the left side of the formula) can be easily and inexpensively obtained, and as a result, the structure design of thioamide can be freely performed.
- R 2 is selectively used for the synthesis of the desired thiazole derivative.
- dimethylformamide dimethyl sulfoxide, N-methylpyrrolidone, toluene or the like
- dimethylformamide is preferred from the viewpoint of easy separation of the product in the process of washing the reaction system with water.
- this reaction is performed at 60 to 110 ° C., preferably 80 to 90 ° C. If the temperature is lower than the above temperature, the reaction rate tends to decrease and the yield tends to decrease. If the temperature is higher, side reactions are likely to occur, and purification may take time.
- the most preferable ratio is 1: 1.1: 1.1, because the aldehyde group-containing compound is completely reacted and the purification of thioamide proceeds efficiently.
- This reaction is called the Willgerodt-Kindler reaction and is described in detail in the literature (Brown, E.V. Synthesis 1975, 358).
- the upper reaction generates thioamide dianion.
- the reaction is disclosed in the literature (Murai, T. et al., J.Org.Chem. 2005, 70,8153) and the like.
- a point to note in starting this reaction is that it must be carried out under an inert gas atmosphere such as nitrogen or argon under dehydrating conditions. This is because the thioamide dianion obtained by reacting with a strong base may be easily decomposed by the presence of water or oxygen, and is present stably so as to shift to the next reaction.
- lithium diisopropylamide, sodium hydride, potassium hydride, potassium t-butoxide, calcium hydride, sodium hydroxide, sodium amide, etc. can be used.
- -Butyl lithium (nBuLi) is preferable in terms of easy availability. Further, if butyl lithium is used, there is an advantage that separation is easy as butane gas after the reaction.
- tetrahydrofuran is used as a solvent.
- Toluene, diethyl ether, and the like can be used as other solvents.
- the former may cause a slight side reaction, and the latter may cause the reaction intermediate to precipitate without dissolving, thereby reducing the reaction yield.
- tetrahydrofuran is preferred.
- the reaction temperature at this time can be carried out in the range of ⁇ 78 ° C. to room temperature, but about 0 ° C. is appropriate in view of suppressing side reactions and considering the efficiency.
- the mixing ratio of each compound to be reacted is not generally determined depending on the compound to be used, but generally, about 2 equivalents of nBuLi is added to thioamide, and then about 1 equivalent of thioformamide is added.
- a thiazole skeleton is formed by an intramolecular cyclization reaction.
- the thioformamide used at this time gives a dihydrothiazole having an amino group introduced at the 5-position, which is not known at all.
- Both the 5-position carbon to which the amino group is bonded and the 4-position carbon to which the phenyl group are bonded are asymmetric carbons and can be used for various application developments including optical activity.
- the cyclization reaction can be promoted by adding an appropriate amount of, for example, PhMgBr or nBuMgBr as an organomagnesium compound (Grignard reagent) in the lower reaction.
- the thiazole derivative represented by the general formula (V) is obtained.
- an aryl group phenyl group in the general formula (V)
- dihydrothiazole is basically generated.
- deprotonation proceeds by adding iodine to the reaction system.
- at least one of R 5 and R 6 represented by the general formula (V) is one or more substituents selected from halogen, hydroxy, lower alkyl, lower alkoxy and halo lower alkyl.
- the derivative exhibits fluorescence by being an aryl group which may be substituted with or a heteroaromatic group which may be substituted with the same substituent as described above.
- the reaction conditions at the time of iodine addition were as follows: thioformamide was added at the above reaction temperature ( ⁇ 78 ° C. to room temperature) and mixed for several minutes to several hours, and then the iodine was converted into thioformamide while maintaining the reaction temperature. It is added so as to have a molar concentration of equimolar to 3 times mol, preferably 1.5 to 2.5 times.
- solid iodine can be added as it is, or once dissolved in a reaction solvent (for example, tetrahydrofuran) and added to the reaction system.
- a reaction solvent for example, tetrahydrofuran
- EL elements using electroluminescence have high visibility due to self-emission and are completely solid elements, and thus have characteristics such as excellent impact resistance. Use is drawing attention.
- the organic EL element has features such that the applied voltage can be significantly reduced, the size can be easily reduced, and the power consumption is small. So far, an enormous compound group having a diarylamino group has been reported, and its use as an organic EL device is being studied widely.
- the thiazole derivative represented by the general formula (V) has strong fluorescence, particularly when R 5 and R 6 are diarylamino groups.
- this compound has a conjugated system of diarylamino group that extends to a thiazole ring and a phenyl substituent, and can create a base compound that can be used as an entirely new electronic material, for example, an electron transport layer in an organic EL device. It is.
- reaction formula (c) an example using a thioamide bonded to the 2-position of the pyridyl group is shown, but a thioamide bonded to the 3-position or 4-position may be used. However, it is preferable to use a thioamide bonded to the 2-position because the highest yield can be obtained as the final product (general formula (I ′)).
- the 1 H-nuclear magnetic resonance spectrum and 13 C-nuclear magnetic resonance spectrum of Compound 3 are JNM ⁇ -400 model made by JEOL, and the number of accumulated 1 H-nuclear magnetic resonance spectra is 25 ° C in deuterated chloroform. Eight times, 13 C-nuclear magnetic resonance spectra were measured with 100-200 integrations. The results are as shown below.
- Example 1 compound 1 shown in Example 1 was synthesized, then compound 1 (0.257 g, 1.0 mmol) was dissolved in THF (2.0 mL), and BuLi hexane solution (1.43 M, 1.40 mL, 2.0 mmol) was added at 0 ° C., and the mixture was stirred for 5 minutes. N, N-diphenylthioformamide (0.213 g, 1.0 mmol) was added to the solution at 0 ° C. and stirred for 30 minutes. To this was added iodine (0.512 g, 2.0 mmol) at 0 ° C. and stirring was continued for 2 hours. The reaction mixture was poured into saturated ammonium chloride solution and extracted with methylene chloride.
- Example 6 the same procedure was followed except that N-phenyl-N-methylthioformamide (0.119 g, 1.0 mmol) was used instead of N, N-diphenylthioformamide, and 2- (4- Methoxyphenyl) -4-phenyl-5- (N-phenyl-N-methylamino) thiazole was obtained as a yellow solid in 19% yield.
- the thiazole derivative of the present invention can be easily produced from easily available and inexpensive raw materials through a complicated synthesis route by the production method of the present invention. Further, by specifying the substituent of the starting material for the synthesized product, a product can be selectively obtained, and a completely new compound that has never been obtained can be easily obtained. Therefore, the obtained thiazole derivative can be used as a raw material (and intermediate) for a novel compound useful as a pharmaceutical or agricultural chemical.
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Abstract
Description
は、単結合または二重結合を示し、R1は炭素数3~12の分岐状または環状のアルキル基、アリール基、ヘテロ芳香族基から選択される基を示し、前記各基はさらに、ハロゲン、ヒドロキシ、低級アルキル、低級アルコキシ、ハロ低級アルキルから選択される一種以上の置換基で置換されていても良い。
を示す。
本発明は、チオアミドに強塩基を添加し、次いでチオホルムアミドを反応させることを特徴とするが、このチオアミドの合成方法としては一例として以下の反応式(a)を利用することができる。
ベンジルアミン(12.0mL,0.11mol)のジメチルホルムアミド(DMF:50mL)溶液にベンズアルデヒド(10.1mL,0.1mol)を室温で加えた。ついで、硫黄(3.52g,0.11mol)を加え80~90℃で6時間攪拌しながら加熱した。反応混合液をエチルエーテル(50mL)に注ぎ、有機相を飽和炭酸水素ナトリウム水溶液(200mL)、塩酸(35%,10mL)で洗浄した。さらに有機相を硫酸マグネシウムで乾燥させ、ろ過、減圧濃縮し、残渣をヘキサン/塩化メチレン(1:1,30mL)で再結晶して、化合物1を黄色固体として21.3g(収率:94%)を得た。
化合物1(0.227g,1.0mmol)をTHF(2.0mL)に溶解し、この溶液にn-ブチルリチウム-ヘキサン溶液(1.3mL,2.0mmol)を0℃で徐々に加えた。5分攪拌を行ったのち、N,N-ジメチルチオホルムアミドを同じ温度で加え、さらに2.5時間攪拌を続けた。反応混合液に水(10mL)を加え、有機相をジエチルエーテル(10mL)で抽出した。該有機相を水(10mL)で二回洗浄し、さらに水槽をジエチルエーテル(5mL)で再抽出した。集めた有機相を硫酸マグネシウムで乾燥させ、ろ過、減圧濃縮し、残渣をシリカゲルクロマトグラフィー(展開溶媒;Hexane:EtOAc:Et2N=5:1:0.01)で精製し、トランス-4,5-ジヒドロ-2,4-ジフェニル-5-ジメチルアミノチアゾール(0.14g,50%)を薄黄色固体として得た。
融点 89-91℃
1H NMR (CDCl3)δ2.11(s, 6H, NMe2), 5.11(d, J=2.0 Hz, 1H, SCH), 5.6 (d,J= 2.0 Hz,1H, C=NCH),7.08-7.19 (m, 5H, Ar), 7.27-7.35 (m, 3H, Ar), 7.90-7.92 (m, 2H, Ar); 13C NMR (CDCl3)δ40.0(NMe2), 84.2 (SCH), 90.5 (C=NCH), 126.0, 127.6, 128.4, 128.5, 131.1, 133.5, 139.7, 168.7 (SCN)
また、IRやMSのデータについても合わせて下記に示す。
IR (KBr) 2947, 1597, 1450, 1355, 1265, 1229, 1051, 1027, 834, 754, 687, 651, 566, 521 cm-1;MS(EI)m/z 282(M+);HRMS (EI) Calcd for C17H18N2S(M+) 282.1191. found: 282.1177.
IR(neat) 2951, 2833, 2786, 1605, 1508, 1254, 1170, 1031, 948, 837, 698, 657, 566 cm-1;1HNMR(CDCl3)δ2.19(s,6H, NMe2), 3.77 (s,3H,OMe), 5.16 (d,J= 2.0 Hz, 1H, SCH), 5.61 (d, J= 2.0 Hz, 1H, C=NCH), 6.88-6.90 (d, J= 8.8 Hz, 2H, Ar), 7.19-7.26 (m, 5H, Ar), 7.92-7.94 (m, 2H, Ar); 13C NMR (CDCl3) δ40.0 (NMe2), 55.2 (OMe), 84.2 (SCH), 90.4 (C=NCH), 113.6, 126.1, 126.2, 127.5, 128.5, 130.1, 140.0, 162.0, 168.0 (SCN); MS(EI)m/z 312(M+); HRMS (EI) Calcd for C18H20N2OS(M+) 312.1296. found: 312.1292.
IR(neat) 2966, 1614, 1454, 1287, 1044, 873, 835, 753, 699, 598 cm-1;1H NMR (CDCl3)δ1.28(dd, J=6.8 Hz, 2.0 Hz, 6H, CH(CH 3)2), 2.13 (s, 6H, NMe2), (sept, J=6.8 Hz, 1H, CH(CH3)2),4.99(d, J=2.0Hz, 1H, SCH), 5.33-5.34 (d, J=2.0 Hz, 1H, C=NCH), 7.16-7.27 (m, 5H, Ar);13C NMR (CDCl3)δ21.6(CH(CH3)2), 35.0 (CH(CH3)2),40.0 (NMe2), 83.5 (SCH), 89.7(C=NCH),126.0, 127.6, 128.6, 140.0, 178.6 (SCN); MS(EI)m/z 248(M+);HRMS(EI) Calcd for C14H20N2S(M+) 248.1347. found: 248.1354.
IR (neat) 3290, 3059, 2951, 2788, 1599, 1494, 1467, 1435, 1296, 1280, 1176, 1149, 1045, 1025, 996, 958, 836, 789, 743, 698, 537cm-1;1H NMR (CDCl3) δ2.11 (s, 6H, NMe2), 5.14-5.15 (d, J = 2.0 Hz, 1H, SCH), 5.63 (d, J = 2.0 Hz, 1H, C=NCH), 7.18-7.22 (m, 2H, Ar), 7.24-7.25 (m, 2H, Ar), 7.30-7.37 (m, 2H, Ar) 7.68-7.73 (td, J = 7.8 Hz, 2.0 Hz, 1H, Ar), 8.11-8.13 (d, J = 8.29 Hz, 1H, Ar), 8.64-8.66 (d, J = 8.29 Hz, 1H, Ar ); 13C NMR (CDCl3)δ40.1 (NMe2), 84.9 (SCH), 88.9 (C=NCH), 121.9, 125.6, 126.2, 127.8, 128.7, 136.6, 139.6, 149.4, 151.3, 170.9 (SCN); MS (EI) m/z 283 (M+); HRMS (EI) Calcd for C16H17N3S (M+) 283.1143. found: 283.1170.
IR (neat) 3062, 2949, 1603, 1506, 1451, 1234, 1154, 1028, 949, 842, 753, 698, 657, 562 cm-1;1H NMR (CDCl3)δ2.20 (s, 6H, NMe2), 5.22 (d, J= 2.0 Hz, 1H, SCH), 5.63 (d, J = 2.0 Hz, 1H, C=NCH), 7.05-7.10 (t, J= 8. 5 Hz, 2H, Ar), 7.23-7.31 (m, 5H, Ar), 7.95-8.00 (m, 2H, Ar); 13C NMR (CDCl3)δ 40.1(NMe2), 84.3 (SCH), 91.1 (C=NCH), 126.0, 127.6, 128.4, 128.5, 131.1, 133.5, 139.7, 168.7 (SCN); 19F NMR (CDCl3)δ -108.8; MS (EI) m/z 300 (M+);HRMS (EI) Calcd for C17H17FN2S (M+) 300.1096. found: 300.1120.
IR (neat) 2965, 2360, 1611, 1451, 1362, 1042, 1002, 751, 698 cm-1;1H NMR (CDCl3)δ1.39 (s, 9H, CH(CH)3),2.21 (s, 6H, NMe2), 5.02-5.03 (d, J = 1.5 Hz, 1H, SCH), 5.46-5.47(d, J= 1.5 Hz, 1H, C=NCH), 7.22-7.35 (m, 5H, Ar); 13C NMR(CDCl3)δ29.6(CH(CH)3), 38.9 (CH(CH)3), 40.0 (NMe2), 83.8 (SCH), 89.5 (C=NCH), 125.9, 127.5, 128.5, 139.9, 181.5 (SCN); MS(EI) m/z 262 (M+); HRMS (EI) Calcd for C15H22N2S(M+) 262.1504. found: 262.1500.
(m.p. 92-94 ℃): IR (KBr) 2854, 1598, 1450, 1269, 1231, 1137, 1113, 945, 752, 565 cm-1;1H NMR (CDCl3)δ 2.47-2.52 (m, 4H, N(CH2)2), 3.67-3.69 (m, 4H, O(CH2)2), 5.08-5.09 (d, J = 2.0 Hz, 1H, SCH), 5.68 (d, J = 2.0 Hz, 1H, C=NCH), 7.18-7.29 (m, 5H, Ar), 7.36-7.41 (m, 3H, Ar), 7.95-7.98 (m, 2H, Ar); 13C NMR (CDCl3)δ47.9 (N(CH2)2), 66.3 (O(CH2)2), 83.6 (SCH), 89.1 (C=NCH), 126.2, 127.8, 128.5, 128.6, 128.7, 131.4, 133.3, 139.4, 168.8 (SCN); MS (EI) m/z 324 (M+); HRMS (EI) Calcd for C19H20N2OS (M+)324.1296. found: 324.1269.
ピリジルメチルアミン(2.22mL,0.022mol)のジメチルホルムアミド(DMF:8mL)溶液にベンズアルデヒド(2.03mL,0.02mol)を室温で加えた。ついで、硫黄(0.71g,0.022mol)を加え80~90℃で6時間攪拌しながら加熱した。反応混合液をエチルエーテル(20mL)に注ぎ、有機相を飽和炭酸水素ナトリウム水溶液(50mL)で洗浄した。さらに有機相を硫酸マグネシウムで乾燥させ、ろ過、減圧濃縮し、残渣シリカゲルカラムクロマトグラフィー(展開溶媒;Hexane:EtOAc=2:1~1:2)で精製し、化合物1を黄色固体として3.33g(収率:73%)を得た。
化合物1’(0.228g,1.0mmol)をTHF(2.0mL)に溶解し、この溶液にn-ブチルリチウム-ヘキサン溶液(1.3mL,2.0mmol)を0℃で徐々に加えた。5分攪拌を行ったのち、N,N-ジメチルチオホルムアミドを同じ温度で加え、さらに3時間攪拌を続けた。反応混合液に水(10mL)を加え、有機相をジエチルエーテル(10mL)で抽出した。該有機相を水(10mL)で二回洗浄し、さらに水槽をジエチルエーテル(5mL)で再抽出した。集めた有機相を硫酸マグネシウムで乾燥させ、ろ過、減圧濃縮し、残渣をシリカゲルクロマトグラフィー(展開溶媒;Hexane:EtOAc:Et2N=5:1:0.01)で精製し、2-フェニル-4-(2-ピリジル)チアゾール(0.149g,62%)を薄橙色固体として得た。
融点 107-109℃
IR (KBr) 2362, 1587, 1474, 1420, 1057, 991, 754, 684, 667, 591 cm-1;1H NMR (CDCl3)δ 7.07-7.11 (m,1H, Ar), 7.28-7.35 (m, 3H, Ar), 7.62-7.66 (td, J = 7.6 Hz, 7.8 Hz, 1H, Ar), 7.91-7.93 (m, 2H, Ar), 7.97 (s, 1H, SCH), 8.14-8.16 (d, J = 7.8 Hz, 1H, Ar), 8.50-8.51 (d, J= 3.9 Hz, 1H, Ar); 13C NMR (CDCl3)δ116.8, 121.2, 122.7, 126.5, 128.8, 130.0, 133.5, 136.8, 149.3, 152.5, 156.0, 167.9 (SCN); MS (EI) m/z 238 (M+); HRMS (EI) Calcd for C14H10N2S (M+) 238.0565. found: 238.0572.
1H NMR(CDCl3) δ7.12-7.16(m, 1H, Ar), 7.20-7.24 (m, 1H, Ar), 7.67-7.72 (m, 2H, Ar), 8.11-8.16 (m, 2H, Ar), 8.20-8.22 (d, J = 7.8 Hz, 1H, Ar), 8.52-8.55 (m, 2H, Ar).
(m.p. 114-115 ℃) : IR (KBr) 3126, 1587, 1473, 1424, 1227, 1052, 830, 767, 698 cm-1;1 H NMR(CDCl3)δ7.09-7.10(m, 1H, Ar), 7.22- 7.25 (m, 1H, Ar), 7.42-7.43 (dd, J = 4.9 Hz, 1.0 Hz, 1H, Ar), 7.56-7.58 (dd, J = 3.9 Hz, 1.0 Hz, 1H, Ar), 7.76-7.80 (m, 1H, Ar), 8.04(s, 1H, SCH), 8.23-8.25 (d, J =7.8 Hz, 1H, ), 8.63-8.64 (m, 1H, Ar); 13C NMR (CDCl3)δ116.0,121.3, 122.8, 126.6, 127.6, 127.7, 136.8, 137.2, 149.3, 152.2, 155.6, 161.5 (SCN);MS(EI) m/z 244 (M+); HRMS (EI) Calcd for C12H8N2S2(M+) 244.0129. found: 244.0105.
(m.p. 100-103 ℃): IR (KBr) 3085, 2836, 1605, 1476, 1306, 1247, 1180, 1026, 834, 776, 713 cm-1;1H NMR (CDCl3)δ3.76 (s, 1H, OMe), 6.85-6.89 (d, J= 8.8 Hz, 2H, Ar), 7.11- 7.17 (m, 1H, Ar), 7.66-7.70 (td, J = 7.8 Hz, 2.0 Hz, 1H, Ar), 7.86-7.90 (d, J = 8.8 Hz, 2H, Ar), 7.93 (s, 1H, SCH), 8.15-8.17(d, J = 7.8 Hz, ;1H, Ar), 8.52 -8.54 (m, 1H, Ar); 13C NMR (CDCl3)δ55.3(CH3), 114.2, 116.0, 121.2, 122.7, 126.5, 128.0, 136.9, 149.3,152.6, 155.7, 161.1, 167.9 (SCN); MS (EI) m/z 268 (M+); HRMS (EI) Calcd for C15H12N2OS (M+)268.0670. found: 268.0663.
(m.p.140-144℃): IR (KBr) 3103, 1588, 1519, 1477, 1229, 1060, 994, 832, 751, 581, 505 cm-1;1H NMR (CDCl3)δ7.12-7.18 (t, J = 8.8 Hz, 2H, Ar), 7.22-7.25 (m, 1H, Ar), 7.76-7.81 (td, J= 7.82 Hz, 1H, Ar), 7.99-8.04 (m, 2H, Ar), 8.08 (s, 1H, SCH), 8.23-8.25 (d, J= 7.81 Hz, 1H, Ar), 8.63-8.64 (m, 1H, Ar); 13C NMR (CDCl3)δ115.8, 116.0, 116.8, 121.2,122.8, 129.9, 129.9, 136.9, 149.3, 152.4, 156.0, 162.6 165.1, 166.8 (SCN); 19F NMR (CDCl3) δ-20.0; MS (EI)m/z 256 (M+); HRMS (EI) Calcd for C14H9FN2S(M+) 256.0470. found: 256.0474.
(m.p.123-127 ℃): IR (KBr) 2361, 1588, 1475, 1407, 1327, 1162, 1110, 1068, 846, 764, 673, 608 cm-1;1H NMR (CDCl3) δ7.13-7.17(m, 1H, Ar), 7.59-7.91 (d, J = 8.3 Hz, 2H, Ar), 7.66-7.71 (td, J =7.6 Hz, 1H, Ar), 8.01-8.03 (m, 3H, Ar), 8.13-8.15 (d, J = 7.8 Hz, 1H, Ar), 8.52-8.54 (d, J = 4.9 Hz, 1H, Ar); 13C NMR (CDCl3) δ117.8, 121.3, 122.5, 123.0, 125.8, 125.9, 126.7, 131.4, 131.7, 136.6, 136.9, 149.4, 152.2, 156.6, 166.0 (SCN);19F NMR (CDCl3) δ-63.1; MS (EI) m/z 306 (M+);HRMS (EI) Calcd for C15H9 F3N2S(M+) 306.0439. found: 306.0428.
橙色液体:IR (neat) 2967, 1588, 1496, 1420, 1331, 1051, 754, 621 cm-1;1H NMR (CDCl3)δ1.35-1.37 (d, J= 7.3 Hz, 6H, CH(CH 3)2), 3.25-3.35 (sept, J = 6.9 Hz, 1H, CH(CH3)2), 7.08-7.11 (m, 1H, Ar), 7.62-7.67 (td, J = 7.6 Hz, 1H, Ar), 7.84 (s, 1H, SCH), 8.02-8.04 (d, J = 7.84 Hz, 1H, Ar), 8.51-8.52 (d, J =4.9 Hz, 1H, Ar); 13C NMR (CDCl3)δ23.1 (CH(CH3)2), 33.4 (CH(CH3)2), 115.6, 121.1, 122.4, 136.8, 149.3, 152.8, 154.5, 178.0 (SCN); MS (EI) m/z 204 (M+); HRMS (EI)Calcd for C11H12N2S (M+) 204.0721. found: 204.0691.
橙色オイル:IR (neat) 2961, 2925, 1588, 1495, 1463, 1065, 994, 754 cm-1;1H NMR (CDCl3)δ1.42 (s, 9H, C(CH3)3), 7.10-7.19 (m, 1H, Ar), 7.65-7.69 (td, J = 7.8 Hz, 1H, Ar), 7.85 (s, 1H, SCH), 8.08-8.10 (dd, J = 7.8 Hz, 1.0 Hz, 1H, Ar), 8.51-8.52 (d, J= 7.8 Hz, 1H, Ar); 13C NMR (CDCl3)δ30.9 (C(CH3)3), 37.8 (C(CH3)3), 115.6, 121.3, 122.4, 136.8, 149.3, 153.0, 154.4, 181.1 (SCN); MS (EI) m/z 218 (M+); HRMS (EI) Calcd for C12H14N2S (M+) 218.0878. found: 218.0857.
mp.:152-155℃;IR(KBr)3064, 2926, 2839, 1602, 1515, 1490, 1415, 1341, 1290, 1245, 1173, 1029, 975, 838, 748, 514 cm-1;1H NMR (CDCl3)δ3.75 (s, 3H, OMe), 6.86 (d, J= 8.8 Hz, 2H, Ar), 6.90 (t, J = 7.3 Hz, 2H, Ar), 7.05-7.07 (m, 4H, Ar), 7.10-7.20 (m, 7H, Ar), 7.82(d, J= 8.8 Hz, 2H, Ar), 7.85-7.88 (m, 2H, Ar); 13C NMR (CDCl3)δ55.4(OMe), 114.1, 121.3, 122.9, 127.0, 127.4, 127.7, 127.9, 128.2, 129.2, 133.4, 138.9, 146.5, 148.6, 161.2, 163.6 (SC=N) ;MS (EI) m/z 434 (M+);HRMS (EI) Calcd for C28H22N2OS(M+) 434.1453. found: 434.1437.
mp.:100-101℃;IR(KBr) 2939, 1904, 1596, 1491, 1298, 1258, 1221, 1168, 1136, 1111, 1028, 977, 833, 751, 701cm-1;1H NMR (CDCl3)δ3.10 (s, 3H, NMe), 3.74 (s, 3H, OMe),6.76-6.87 (m, 5H, Ar), 7.12-7.21 (m, 3H, Ar), 7.26 (t, J = 7.3 Hz, 2H, Ar), 7.83 (d,J = 9.4 Hz, 2H, Ar), 7.90 (d,J= 7.32 Hz, 2H, Ar); 13C NMR (CDCl3)δ40.3 (NMe), 55.3 (OMe), 114.1, 114.2, 119.3, 127.1, 127.3, 127.7, 127.9, 128.5, 129.1, 133.8, 141.0, 148.3, 148.4, 161.1, 163.2 (SC=N);MS(EI)m/z 372 (M+).
Claims (5)
- 一般式(II)で表されるチオアミドに強塩基を添加して、一般式(III)で示されるチオホルムアミドを反応させることを特徴とする一般式(I)で表されるチアゾール誘導体の製造方法。
は、単結合または二重結合を示し、
R1は炭素数3~12の分岐状または環状のアルキル基、アリール基、ヘテロ芳香族基から選択される基を示し、各基はさらに、ハロゲン、ヒドロキシ、低級アルキル、低級アルコキシ、ハロ低級アルキルから選択される一種以上の置換基で置換されていても良く、
R2は、ハロゲン、ヒドロキシ、低級アルキル、低級アルコキシ、ハロ低級アルキルから選択される一種以上の置換基で置換されていても良いアリール基または、ハロゲン、ヒドロキシ、低級アルキル、低級アルコキシ、ハロ低級アルキルから選択される一種以上の置換基で置換されていても良いピリジル基を示し、
R3及びR4は同一又は異なって、炭素数1~12の直鎖状、分岐状または環状のアルキル基、アリール基、ヘテロ芳香族基から選択される基(但し、前記各基はさらに、ハロゲン、ヒドロキシ、低級アルキル、低級アルコキシ、ハロ低級アルキルから選択される一種以上の置換基で置換されていても良い。)、あるいはR3及びR4はそれらが結合する窒素原子と一緒になって5員ないし7員の複素環を示し、
Yは、水素原子または、
を示す。] - 前記強塩基が、n-ブチルリチウム、リチウムジイソプロピルアミド、水素化ナトリウム、水素化カリウム、カリウムt-ブトキシド、水素化カルシウム、水酸化ナトリウム、ナトリウムアミドから選択される一種以上である請求項1記載のチアゾール誘導体の製造方法。
- 前記チオホルムアミドを反応させた後、さらにヨウ素を添加して反応させることを特徴とする請求項1または2に記載のチアゾール誘導体の製造方法。
- 一般式(IV)
R1は炭素数3~12の分岐状または環状のアルキル基、アリール基、ヘテロ芳香族基から選択される基を示し、各基はさらに、ハロゲン、ヒドロキシ、低級アルキル、低級アルコキシ、ハロ低級アルキルから選択される一種以上の置換基で置換されていても良く、
Yは、水素原子または、
{R3及びR4は同一又は異なって、炭素数1~12の直鎖状、分岐状または環状のアルキル基、アリール基、ヘテロ芳香族基から選択される基(但し、前記各基はさらに、ハロゲン、ヒドロキシ、低級アルキル、低級アルコキシ、ハロ低級アルキルから選択される一種以上の置換基で置換されていても良い。)、あるいはR3及びR4はそれらが結合する窒素原子と一緒になって5員ないし7員の複素環を示す}を示す]
で表されるチアゾール誘導体。 - 一般式(V)
R1は炭素数3~12の分岐状または環状のアルキル基、アリール基、ヘテロ芳香族基から選択される基を示し、各基はさらに、ハロゲン、ヒドロキシ、低級アルキル、低級アルコキシ、ハロ低級アルキルから選択される一種以上の置換基で置換されていても良く、
R5及びR6は同一又は異なって、炭素数1~12の直鎖状、分岐状または環状のアルキル基、アリール基、ヘテロ芳香族基から選択される基(但し、前記各基はさらに、ハロゲン、ヒドロキシ、低級アルキル、低級アルコキシ、ハロ低級アルキルから選択される一種以上の置換基で置換されていても良い。)を示し、R5及びR6のうち少なくとも一方は、ハロゲン、ヒドロキシ、低級アルキル、低級アルコキシ、ハロ低級アルキルから選択される一種以上の置換基で置換されていても良いアリール基または、ハロゲン、ヒドロキシ、低級アルキル、低級アルコキシ、ハロ低級アルキルから選択される一種以上の置換基で置換されていても良いヘテロ芳香族基を示す]
で表されるチアゾール誘導体。
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JP2023001168A (ja) * | 2017-02-08 | 2023-01-04 | 国立大学法人東海国立大学機構 | 新規な芳香族アミン化合物および蛍光発光材料と紫外線吸収剤 |
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WO2017123058A1 (en) | 2016-01-14 | 2017-07-20 | Handok Inc. | Compounds antagonizing a3 adenosine receptor, method for preparing them, and medical-use thereof |
US10196396B2 (en) | 2016-01-14 | 2019-02-05 | Handok Inc. | Compounds antagonizing A3 adenosine receptor, method for preparing them, and medical-use thereof |
JP2023001168A (ja) * | 2017-02-08 | 2023-01-04 | 国立大学法人東海国立大学機構 | 新規な芳香族アミン化合物および蛍光発光材料と紫外線吸収剤 |
JP7426047B2 (ja) | 2017-02-08 | 2024-02-01 | 国立大学法人東海国立大学機構 | 新規な芳香族アミン化合物および蛍光発光材料と紫外線吸収剤 |
Also Published As
Publication number | Publication date |
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EP2388253B1 (en) | 2015-02-11 |
EP2388253A4 (en) | 2012-08-08 |
JPWO2010104027A1 (ja) | 2012-09-13 |
US8871944B2 (en) | 2014-10-28 |
JP5610351B2 (ja) | 2014-10-22 |
KR20110113775A (ko) | 2011-10-18 |
US20110319616A1 (en) | 2011-12-29 |
EP2388253A1 (en) | 2011-11-23 |
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