JP2014111561A - 芳香族化合物の重水素化方法 - Google Patents
芳香族化合物の重水素化方法 Download PDFInfo
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- JP2014111561A JP2014111561A JP2013164858A JP2013164858A JP2014111561A JP 2014111561 A JP2014111561 A JP 2014111561A JP 2013164858 A JP2013164858 A JP 2013164858A JP 2013164858 A JP2013164858 A JP 2013164858A JP 2014111561 A JP2014111561 A JP 2014111561A
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- 150000001491 aromatic compounds Chemical class 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000003054 catalyst Substances 0.000 claims abstract description 102
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 93
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 68
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 37
- 229910052805 deuterium Inorganic materials 0.000 claims abstract description 36
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 30
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims abstract description 27
- BTANRVKWQNVYAZ-UHFFFAOYSA-N butan-2-ol Chemical compound CCC(C)O BTANRVKWQNVYAZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- AQIXEPGDORPWBJ-UHFFFAOYSA-N pentan-3-ol Chemical compound CCC(O)CC AQIXEPGDORPWBJ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 22
- 239000001257 hydrogen Substances 0.000 claims abstract description 22
- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 17
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000010948 rhodium Substances 0.000 claims abstract description 16
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052707 ruthenium Inorganic materials 0.000 claims abstract description 12
- 239000011903 deuterated solvents Substances 0.000 claims abstract description 6
- -1 alkane compounds Chemical class 0.000 claims description 166
- 125000004432 carbon atom Chemical group C* 0.000 claims description 67
- 125000001424 substituent group Chemical group 0.000 claims description 47
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 36
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 29
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims description 25
- 150000001875 compounds Chemical class 0.000 claims description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- DSVGQVZAZSZEEX-UHFFFAOYSA-N [C].[Pt] Chemical group [C].[Pt] DSVGQVZAZSZEEX-UHFFFAOYSA-N 0.000 claims description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 125000000217 alkyl group Chemical group 0.000 claims description 11
- 125000006615 aromatic heterocyclic group Chemical group 0.000 claims description 11
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 125000003118 aryl group Chemical group 0.000 claims description 7
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 6
- 125000004448 alkyl carbonyl group Chemical group 0.000 claims description 6
- 125000005129 aryl carbonyl group Chemical group 0.000 claims description 6
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- 125000004457 alkyl amino carbonyl group Chemical group 0.000 claims description 5
- 125000005018 aryl alkenyl group Chemical group 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- 125000003545 alkoxy group Chemical group 0.000 claims description 4
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- 125000005843 halogen group Chemical group 0.000 claims description 4
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- 238000006243 chemical reaction Methods 0.000 abstract description 55
- 239000007789 gas Substances 0.000 abstract description 10
- 239000002904 solvent Substances 0.000 abstract description 9
- 230000003213 activating effect Effects 0.000 abstract description 2
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- 239000000758 substrate Substances 0.000 description 33
- 235000010290 biphenyl Nutrition 0.000 description 26
- 239000004305 biphenyl Substances 0.000 description 26
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 18
- 239000006184 cosolvent Substances 0.000 description 11
- 239000000243 solution Substances 0.000 description 11
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 10
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 10
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- 239000002184 metal Substances 0.000 description 10
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 8
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- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 7
- FCEHBMOGCRZNNI-UHFFFAOYSA-N 1-benzothiophene Chemical compound C1=CC=C2SC=CC2=C1 FCEHBMOGCRZNNI-UHFFFAOYSA-N 0.000 description 6
- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 6
- SIKJAQJRHWYJAI-UHFFFAOYSA-N Indole Chemical compound C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 description 6
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 6
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 6
- IYYZUPMFVPLQIF-UHFFFAOYSA-N dibenzothiophene Chemical compound C1=CC=C2C3=CC=CC=C3SC2=C1 IYYZUPMFVPLQIF-UHFFFAOYSA-N 0.000 description 6
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 6
- 239000003446 ligand Substances 0.000 description 6
- 125000004458 methylaminocarbonyl group Chemical group [H]N(C(*)=O)C([H])([H])[H] 0.000 description 6
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 6
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 6
- BBEAQIROQSPTKN-UHFFFAOYSA-N pyrene Chemical compound C1=CC=C2C=CC3=CC=CC4=CC=C1C2=C43 BBEAQIROQSPTKN-UHFFFAOYSA-N 0.000 description 6
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 6
- 125000003236 benzoyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C(*)=O 0.000 description 5
- 125000001153 fluoro group Chemical group F* 0.000 description 5
- 125000004674 methylcarbonyl group Chemical group CC(=O)* 0.000 description 5
- 125000004676 n-butylcarbonyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C(*)=O 0.000 description 5
- 125000006252 n-propylcarbonyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C(*)=O 0.000 description 5
- 230000035484 reaction time Effects 0.000 description 5
- 125000006253 t-butylcarbonyl group Chemical group [H]C([H])([H])C(C(*)=O)(C([H])([H])[H])C([H])([H])[H] 0.000 description 5
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- ROFVEXUMMXZLPA-UHFFFAOYSA-N Bipyridyl Chemical compound N1=CC=CC=C1C1=CC=CC=N1 ROFVEXUMMXZLPA-UHFFFAOYSA-N 0.000 description 4
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- 230000004913 activation Effects 0.000 description 4
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- 125000004122 cyclic group Chemical group 0.000 description 4
- WMKGGPCROCCUDY-PHEQNACWSA-N dibenzylideneacetone Chemical compound C=1C=CC=CC=1\C=C\C(=O)\C=C\C1=CC=CC=C1 WMKGGPCROCCUDY-PHEQNACWSA-N 0.000 description 4
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- 125000006126 n-butyl sulfonyl group Chemical group 0.000 description 1
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- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
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- SJLOMQIUPFZJAN-UHFFFAOYSA-N oxorhodium Chemical compound [Rh]=O SJLOMQIUPFZJAN-UHFFFAOYSA-N 0.000 description 1
- 125000001820 oxy group Chemical group [*:1]O[*:2] 0.000 description 1
- 125000005429 oxyalkyl group Chemical group 0.000 description 1
- 229910003445 palladium oxide Inorganic materials 0.000 description 1
- PBDBXAQKXCXZCJ-UHFFFAOYSA-L palladium(2+);2,2,2-trifluoroacetate Chemical compound [Pd+2].[O-]C(=O)C(F)(F)F.[O-]C(=O)C(F)(F)F PBDBXAQKXCXZCJ-UHFFFAOYSA-L 0.000 description 1
- NXJCBFBQEVOTOW-UHFFFAOYSA-L palladium(2+);dihydroxide Chemical compound O[Pd]O NXJCBFBQEVOTOW-UHFFFAOYSA-L 0.000 description 1
- 125000004115 pentoxy group Chemical group [*]OC([H])([H])C([H])([H])C([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 125000001148 pentyloxycarbonyl group Chemical group 0.000 description 1
- 229950000688 phenothiazine Drugs 0.000 description 1
- 150000003057 platinum Chemical class 0.000 description 1
- CLSUSRZJUQMOHH-UHFFFAOYSA-L platinum dichloride Chemical compound Cl[Pt]Cl CLSUSRZJUQMOHH-UHFFFAOYSA-L 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- PBMFSQRYOILNGV-UHFFFAOYSA-N pyridazine Chemical compound C1=CC=NN=C1 PBMFSQRYOILNGV-UHFFFAOYSA-N 0.000 description 1
- 150000003283 rhodium Chemical class 0.000 description 1
- 229910003450 rhodium oxide Inorganic materials 0.000 description 1
- SVOOVMQUISJERI-UHFFFAOYSA-K rhodium(3+);triacetate Chemical compound [Rh+3].CC([O-])=O.CC([O-])=O.CC([O-])=O SVOOVMQUISJERI-UHFFFAOYSA-K 0.000 description 1
- SONJTKJMTWTJCT-UHFFFAOYSA-K rhodium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Rh+3] SONJTKJMTWTJCT-UHFFFAOYSA-K 0.000 description 1
- 229910001927 ruthenium tetroxide Inorganic materials 0.000 description 1
- OJLCQGGSMYKWEK-UHFFFAOYSA-K ruthenium(3+);triacetate Chemical compound [Ru+3].CC([O-])=O.CC([O-])=O.CC([O-])=O OJLCQGGSMYKWEK-UHFFFAOYSA-K 0.000 description 1
- VDRDGQXTSLSKKY-UHFFFAOYSA-K ruthenium(3+);trihydroxide Chemical compound [OH-].[OH-].[OH-].[Ru+3] VDRDGQXTSLSKKY-UHFFFAOYSA-K 0.000 description 1
- YBCAZPLXEGKKFM-UHFFFAOYSA-K ruthenium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Ru+3] YBCAZPLXEGKKFM-UHFFFAOYSA-K 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 125000005930 sec-butyloxycarbonyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(OC(*)=O)C([H])([H])[H] 0.000 description 1
- 125000003548 sec-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000005931 tert-butyloxycarbonyl group Chemical group [H]C([H])([H])C(OC(*)=O)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- WLPUWLXVBWGYMZ-UHFFFAOYSA-N tricyclohexylphosphine Chemical compound C1CCCCC1P(C1CCCCC1)C1CCCCC1 WLPUWLXVBWGYMZ-UHFFFAOYSA-N 0.000 description 1
- BDZBKCUKTQZUTL-UHFFFAOYSA-N triethyl phosphite Chemical compound CCOP(OCC)OCC BDZBKCUKTQZUTL-UHFFFAOYSA-N 0.000 description 1
- HVLLSGMXQDNUAL-UHFFFAOYSA-N triphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 HVLLSGMXQDNUAL-UHFFFAOYSA-N 0.000 description 1
- COIOYMYWGDAQPM-UHFFFAOYSA-N tris(2-methylphenyl)phosphane Chemical compound CC1=CC=CC=C1P(C=1C(=CC=CC=1)C)C1=CC=CC=C1C COIOYMYWGDAQPM-UHFFFAOYSA-N 0.000 description 1
- NZIQBDROTUFRHZ-UHFFFAOYSA-N tritert-butyl phosphite Chemical compound CC(C)(C)OP(OC(C)(C)C)OC(C)(C)C NZIQBDROTUFRHZ-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Furan Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
【解決手段】2−プロパノール、2−ブタノール及び3−ペンタノールから選ばれる少なくとも1種の溶液と、白金触媒、ロジウム触媒及びルテニウム触媒から選ばれる触媒との共存下で、重水及び重水素化溶媒から選ばれる重水素源と芳香族化合物とを接触させる。
【選択図】なし
Description
本件発明者等は、上記問題点を解決すべく鋭意研究した結果、2−プロパノール、2−ブタノール又は3−ペンタノールの存在下で白金触媒を用いて芳香族化合物の重水素化反応を行うと、触媒を予め水素ガス又は重水素ガスで活性化することなく、且つ、水素ガス又は重水素ガスを反応系内に共存させることなく、効率よく目的の化合物の水素を重水素化できることを見出し、本発明を完成するに至った。
更に、本発明の方法によれば、芳香族化合物中の水素原子、特に、芳香環の水素原子を効率よく重水素化することが可能となる。従来重水素化されにくいとされていた無置換の芳香族炭化水素やフッ素原子を置換基として有する芳香族炭化水素、硫黄原子を含む芳香族複素環であっても、その水素原子を重水素化することができる。また、化合物がカルボニル基又は二重結合を有していても、これらが還元されることがなく、目的の化合物の水素原子を重水素化することができるという効果も奏する。
本発明に係る触媒としては、白金触媒、ロジウム触媒又はルテニウム触媒が挙げられ、中でも高い重水素化率を示す白金触媒が好ましい。なお、本発明に係る触媒は、水素ガスや重水素ガス等で予め活性化しておく必要はないが、活性化したものであってもよい。
白金化合物としては、二酸化白金等の酸化白金、塩化白金等が挙げられる。
白金錯体としては、1,5−シクロオクタジエン(COD)、ジベンジリデンアセトン(DBA)、トリシクロヘキシルホスフィン(PCy3),トリエトキシホスフィン(P(OEt)3),トリtert−ブトキシホスフィン(P(OtBu)3),ビピリジン(BPY)、フェナントロリン(PHE)、トリフェニルホスフィン(PPh3),1,2−ビス(ジフェニルホスフィノ)エタン(DPPE),トリフェノキシホスフィン(P(OPh)3)、トリo−トリルホスフィン(P(o−tolyl)3)を配位子として有するもの等が挙げられ、具体的には例えばPtCl2(COD)、PtCl2(DBA)、PtCl2(PCy3)2、PtCl2(P(OEt)3)2、PtCl2(P(OtBu)3)2、PtCl2(BPY)、PtCl2(PHE)、Pt(PPh3)4、Pt(COD)2、Pt(DBA)2、Pt(BPY)2、Pt(PHE)2等が挙げられる。
ロジウム化合物としては、酸化ロジウム、塩化ロジウム、ロジウムアセテート等が挙げられる。
ロジウム錯体としては、例えばトリフェニルホスフィンを配位子とするRhCl(PPh3)3等が挙げられる。
ルテニウム化合物としては、水酸化ルテニウム、二酸化ルテニウム、四酸化ルテニウム、塩化ルテニウム、ルテニウムアセテート等が挙げられる。
ルテニウム錯体としては、例えばトリフェニルホスフィンを配位子とするRuCl2(PPh3)3等が挙げられる。
該パラジウム触媒の具体例としては、例えばパラジウム金属、パラジウム炭素、例えばPd(OH)2等の水酸化パラジウム触媒、例えばPdO等の酸化パラジウム触媒、例えばPdBr2、PdCl2、PdI2等のハロゲン化パラジウム触媒、例えばパラジウムアセテート(Pd(OAc)2)、パラジウムトリフルオロアセテート(Pd(OCOCF3)2)等のパラジウム酢酸塩触媒、例えばアセテートビス(トリフェニルホスフィン)パラジウム[Pd(OAc)2(PPh3)2]、Pd(PPh3)4、Pd2(dba)3、Pd(NH3)2Cl2、Pd(CH3CN)2Cl2、ジクロロビス(ベンゾニトリル)パラジウム[Pd(PhCN)2Cl2]、Pd(PPh3)(CH3CN)2Cl2等の配位子に配位されたパラジウム金属錯体触媒等が挙げられ、中でも、パラジウム炭素が好ましい。
該ニッケル触媒の具体例としては、例えばニッケル金属、例えばNiCl2、NiO等のニッケル触媒、例えばNiCl2(PPh3)2、Ni(PPh3)4、Ni(P(OPh)3)4、Ni(cod)2等の配位子に配位されたニッケル触媒等が挙げられる。
該コバルト金属触媒の具体例としては、例えばCo(C3H5){P(OCH3)3}3等の配位子に配位されたコバルト金属錯体触媒等が挙げられる。
本発明に係る溶液は、2−プロパノール、2−ブタノール及び3−ペンタノールから選ばれる少なくとも1種のものである。これら溶液は、重水素化された2−プロパノール、重水素化された2−ブタノール、又は重水素化された3−ペンタノールであってもよい。これらを用いる場合、重水素源としても用いることができる。
本発明に係る重水素源は、重水又は重水素化溶媒が挙げられるが、重水が好ましい。
基質として用いられる、本発明に係る芳香族化合物としては、(i)置換基を有する又は無置換の芳香族炭化水素化合物、(ii)置換基を有する又は無置換の芳香族複素環化合物、(iii)置換基を有する又は無置換の一般式[1]で示される化合物が挙げられる。
本発明に係る置換基を有する又は無置換の芳香族炭化水素化合物における芳香族炭化水素化合物としては、1〜6の環を有する多環芳香族化合物が挙げられ、具体的には、ベンゼン、ナフタレン、アントラセン、ナフタセン、ピレン、ベンゾピレン等が挙げられる。置換基を有する芳香族炭化水素化合物においては、ナフタレン又はベンゼンが好ましく、ベンゼンがより好ましい。無置換の芳香族炭化水素化合物においては、ナフタレン、アントラセン、ナフタセン、ピレン、ベンゾピレン等が好ましく、ナフタレン、アントラセン、ナフタセン、ピレン等がより好ましい。
置換基を有する芳香族複素環化合物及び無置換の芳香族複素環化合物における、芳香族複素環化合物としては、例えば、ピロール、イミダゾール、ピラゾール、フラン、チオフェン、オキサゾール、イソオキサゾール、チアゾール、イソチアゾール、ピリジン、ピリミジン、ピリダジン、ピラジン、インドール;ベンゾチアゾール、ベンゾチオフェン、ベンゾイミダゾール、ベンゾフラン、キノリン、イソキノリン、キノキサリン、クロメン、イソクロメン、クマリン、クロモン;フェノチアジン、フェノキサジン、カルバゾール、ジベンゾチオフェン等が挙げられ、中でも、フラン、インドール、カルバゾール、ベンゾチオフェン、ベンゾフラン、クマリン、ジベンゾチオフェン等が好ましい。
本発明に係る有機溶媒は、本発明に係る溶液の共溶媒として用いられる。これらを用いることにより、基質の溶解性を向上させることができ、その結果重水素化率を向上させることもできるため、該有機溶媒を用いるのが好ましい。特に、本発明に係る溶液への溶解性が低い基質を用いる場合には、該基質の溶解度が高い適当な有機溶媒を選択して用いるのが好ましい。
本発明に係る重水素化方法は、本発明に係る溶液と本発明に係る触媒の共存下で、重水素源と芳香族化合物とを接触反応させて、芳香族化合物中の水素原子を重水素化させることによりなされる。基質の種類により、有機溶媒を添加して反応させてもよい。
即ち、所定の反応終了後、反応液をエーテルで抽出して触媒を濾過し、濾液を減圧濃縮した後、適当な内部標準物質〔デュレン(1,2,4,5−テトラメチルベンゼン)、ベンゼン、アセトン、アセトニトリル、ジオキサン、ジメチルスルホキシド、ジクロロメタン等〕を加えて1H−NMR、2H−NMR及びMassスペクトルを測定して構造解析を行った。その結果を元に重水素化された水素の位置を同定し、反応基質が有する水素原子の重水素化率を求めた。
2−プロパノール 0.1mlの代わりに3−ペンタノール 0.1mlを用いた以外は、実施例9と同様にして、ビフェニルの重水素化反応を行い、目的とする重水素化合物を定量的に得た。
但し、実施例30では、混合触媒として、10% Pt/C (3 mol%)以外に10% Pd/C (3 mol%)を共存させて反応を行った。また、実施例42では、10% Pt/C (3 mol%)の代わりに10% Pt/C (10 mol%)を使用し、実施例38、43、44、46では、10% Pt/C (3 mol%)の代わりに10% Pt/C (15 mol%)を使用した。
*2 実施例42 10% Pt/C (10 mol%)を使用
*3 実施例38、43、44、46 10% Pt/C (15 mol%)を使用
また、実施例29及び30の結果より、白金炭素に更にパラジウム炭素を共存させて重水素化反応を行うと、置換基であるアルキル基部分の重水素化率が向上することが判った。パラジウム炭素は、重水素化反応において触媒活性を示していないが(比較例6)、混合触媒として用いると重水素化率を向上させることが判った。
但し、実施例64では、2−プロパノールの使用量を0.3mlとした。
*3 実施例64 2-PrOHを0.3ml使用。
実施例67〜70.各種基質の重水素化反応3
Claims (9)
- 2−プロパノール、2−ブタノール及び3−ペンタノールから選ばれる少なくとも1種の溶液と、白金触媒、ロジウム触媒及びルテニウム触媒から選ばれる触媒との共存下で、重水及び重水素化溶媒から選ばれる重水素源と芳香族化合物とを接触させることを特徴とする、当該芳香族化合物の重水素化方法。
- 触媒が、白金触媒である、請求項1記載の方法。
- 白金触媒が、白金炭素、白金アルミナ又は酸化白金である、請求項2記載の方法。
- 白金触媒、ロジウム触媒及びルテニウム触媒から選ばれる前記触媒と、当該触媒とは異なる白金族触媒との共存下で、重水素源と芳香族化合物とを接触させる、請求項1記載の方法。
- 白金族触媒が、白金触媒、パラジウム触媒、ロジウム触媒、ルテニウム触媒、ニッケル触媒、又はコバルト触媒である、請求項4記載の方法。
- 芳香族化合物が、炭素数1〜6のアルキル基、炭素数2〜6のアルケニル基、炭素数1〜6のアルコキシ基、炭素数6〜10のアリール基、水酸基、アミノ基、カルボキシル基、ハロゲノ基、炭素数2〜7のアルコキシカルボニル基、炭素数2〜7のアルキルカルボニル基、炭素数7〜11のアリールカルボニル基、炭素数8〜13のアリールアルケニル基、炭素数7〜13のアリールオキシアルキル基、炭素数8〜14のアリールカルボニルオキシアルキル基、炭素数2〜10のアルキルアミノカルボニル基、炭素数2〜10のアルキルカルボニルアミノ基、炭素数4〜7のアルキルカルボニルアルケニル基、炭素数4〜7のアルキルカルボニルアルキル基、炭素数12〜20のジアリールシラノール基、炭素数6〜10のアリールスルホニル基、炭素数6〜10のアリールスルホニルオキシ基、炭素数1〜6のアルキルスルホニル基、炭素数1〜6のアルキルスルホニルオキシ基、炭素数2〜12のアルキルホスホリルアルキル基及び複素環基から選ばれる少なくとも一つの置換基を有する、芳香族炭化水素化合物、芳香族複素環化合物、又は下記一般式[1]で示される化合物
(式中、Aは、メチレン基の1〜3個がカルボニル基又は/及び-O-で示される基に置換されていてもよい5〜6員環のシクロアルカンを表す。)、
或いは、無置換の芳香族炭化水素化合物、無置換の芳香族複素環化合物又は無置換の上記一般式[1]で示される化合物である、請求項1〜5の何れかに記載の方法。 - 重水素源が重水である、請求項1〜6の何れかに記載の方法。
- 有機溶媒中で、芳香族化合物と重水素源を接触させる、請求項1〜7の何れかに記載の方法。
- 有機溶媒が、2−プロパノール、2−ブタノール及び3−ペンタノールを除く、アルコール、アルカン化合物、並びにトルエンから選ばれる、請求項8記載の方法。
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