JP5681096B2 - 二酸化炭素とエポキシドとの共重合のための二金属触媒錯体 - Google Patents
二酸化炭素とエポキシドとの共重合のための二金属触媒錯体 Download PDFInfo
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- JP5681096B2 JP5681096B2 JP2011505585A JP2011505585A JP5681096B2 JP 5681096 B2 JP5681096 B2 JP 5681096B2 JP 2011505585 A JP2011505585 A JP 2011505585A JP 2011505585 A JP2011505585 A JP 2011505585A JP 5681096 B2 JP5681096 B2 JP 5681096B2
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- 239000003054 catalyst Substances 0.000 title claims description 82
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims description 46
- 239000001569 carbon dioxide Substances 0.000 title claims description 23
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims description 23
- 238000007334 copolymerization reaction Methods 0.000 title claims description 20
- 150000002118 epoxides Chemical class 0.000 title description 18
- 125000000217 alkyl group Chemical group 0.000 claims description 26
- 238000006243 chemical reaction Methods 0.000 claims description 24
- 125000003118 aryl group Chemical group 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 23
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- -1 propylene, butylene, phenylene Chemical group 0.000 claims description 21
- FWFSEYBSWVRWGL-UHFFFAOYSA-N cyclohexene oxide Natural products O=C1CCCC=C1 FWFSEYBSWVRWGL-UHFFFAOYSA-N 0.000 claims description 20
- 239000000539 dimer Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 150000004696 coordination complex Chemical class 0.000 claims description 15
- 150000004820 halides Chemical class 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 15
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- IAZDPXIOMUYVGZ-UHFFFAOYSA-N DMSO Substances CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 230000000536 complexating effect Effects 0.000 description 3
- QNDQILQPPKQROV-UHFFFAOYSA-N dizinc Chemical compound [Zn]=[Zn] QNDQILQPPKQROV-UHFFFAOYSA-N 0.000 description 3
- 238000000921 elemental analysis Methods 0.000 description 3
- 125000001153 fluoro group Chemical group F* 0.000 description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
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- 125000004191 (C1-C6) alkoxy group Chemical group 0.000 description 2
- 125000006552 (C3-C8) cycloalkyl group Chemical group 0.000 description 2
- DDHUNHGZUHZNKB-UHFFFAOYSA-N 2,2-dimethylpropane-1,3-diamine Chemical compound NCC(C)(C)CN DDHUNHGZUHZNKB-UHFFFAOYSA-N 0.000 description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 2
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- 125000001188 haloalkyl group Chemical group 0.000 description 2
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- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 2
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- 241000894007 species Species 0.000 description 2
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- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000758 substrate Substances 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
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical group C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 125000004205 trifluoroethyl group Chemical group [H]C([H])(*)C(F)(F)F 0.000 description 1
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 1
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000004246 zinc acetate Substances 0.000 description 1
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Description
R3はアルキレン、アリーレン、またはシクロアルキレンであり;
R4はH、アルキル、アリール、またはアルキルアリールであり;
E1はCであり、E2はO、SもしくはNHであるか、または、E1はNであり、E2はOであり;
XはOCOCH3、OCOCF3、OSO2C7H7、OSO(CH3)2、アルキル、アルコキシ、ハライド、またはアミドであり;
MはZn(II)、Co(II)、Mn(II)、Mg(II)、Fe(II)、Cr(II)、Cr(III)−X、Co(III)−X、Mn(III)−XまたはFe(III)−Xである。
実施例1
いくつかのエポキシドと二酸化炭素との反応を、図2に示すように二金属亜鉛錯体[L1Zn2(OAc)2]を用いて行なった。大環状配位子であるH2L1は、後述するように、市販の試薬から2段階で、全体の収率84%で調製した。二金属亜鉛錯体である[L1Zn2(OAc)2]は、水素化カリウムを用いたH2L1の二重脱プロトンおよびそれに続く酢酸亜鉛との反応によって調製した。錯体を白色固体として70%の収率で単離した。
反応はすべて、標準的な無酸素技術を用いて、または窒素を充填したグローブボックス内で、窒素雰囲気下で行なった。高圧反応は、Parr 5513の100mLのベンチリアクター内で行なった。4−tert−ブチル−2,6−ジホルミルフェノールは文献の手順に従って合成した。全ての溶媒および試薬は市販のものを入手した(AldrichおよびMerck)。THFはナトリウムから蒸留し、窒素下で保管した。シクロヘキセンオキシド、塩化メチレンおよびd2−TCEはCaH2から蒸留し、窒素下で保管した。重合の研究にはCPグレードの二酸化炭素を用いた。
[H4L1’](ClO4)2(1.80g,2.69mmol)をメタノール(180mL)に懸濁させた。懸濁液を0℃に冷却し、NaBH4(2.65g,69.9mmol)をゆっくりと添加した。NaBH4を添加すると、赤−橙色の懸濁液は、透明な溶液に変化した。水をゆっくりと添加すると、溶液が混濁した。沈殿が生成し始めたら、混合物を一晩放置し、H2L1を白色固体として濾別した(1.21g,88%)。
H2L1(0.40g,0.72mmol)を乾燥THF(10mL)に溶解させ、KH(0.04g,1.08mmol)を入れたシュレンク試験管に移し、窒素下で−78℃に冷却した。この懸濁液を室温まで温め、1時間攪拌し続けた。過剰のKHを濾別し、溶液をZn(OAc)2(0.27g,1.48mmol)を入れたシュレンク試験管に移した。反応を攪拌したまま16時間、一晩行い、その後THFを真空中で除去し、生成物を乾燥CH2Cl2(10mL)中に取り出した。次いで、これを濾過し、CH2Cl2を真空中で除去し、表題化合物を白色粉末として得た(0.40g,69.5%)。
シクロヘキセンオキシド(5mL、49.4mmol)および[L1Zn2(OAc)2](0.049mmol)をシュレンク試験管に添加した。シクロヘキセンオキシドを脱気した後、1気圧のCO2下、一定の温度で24時間攪拌した。次いで、粗反応混合物をCH2Cl2中に取り出し、空気中で蒸発させ、その後生成物を一晩真空中で乾燥させた。
錯体[L2Zn2(OAc)2]および[L3Zn2(OAc)2]を、[L1Zn2(OAc)2]と同様に調製した。
丸底フラスコに、4−R1−2,6−ジホルムフェノール(ここでR1は式(I)で定義した通りである)(5.80mmol)、NaClO4(2.81g,23.2mmol)、酢酸(0.66mL,11.6mmol)およびメタノール(90mL)を添加した。この溶液を、攪拌しながら70℃に加熱し、溶液が沸騰し始めたら、2,2−ジメチル−1,3−プロパンジアミン(0.70mL,5.8mmol)をメタノール(30mL)でゆっくりと添加した。反応混合物を室温まで冷却し、24時間攪拌を続け、その後、沈殿を濾過し、冷(−78℃)メタノールで洗浄した。
[H4L2’](ClO4)2(2.7mmol)を、メタノール(180mL)に懸濁させた。懸濁液を0℃に冷却し、NaBH4(2.65g,70mmol)をゆっくりと添加した。NaBH4を添加すると、赤−橙色の懸濁液が透明な溶液に変化した。溶液を室温で1時間攪拌し、その後、水をゆっくりと添加すると溶液が混濁した。沈殿が生成し始めたら、混合物を一晩放置した。生成物を濾過し、水で洗浄し、真空下で乾燥させて表題化合物の黄白色結晶を得た。
[H4L3’](ClO4)2(1.40g,2.02mmol)をMeOH(110mL)に懸濁させた。懸濁液を0℃に冷却し、NaBH4(1.99g,52.6mmol)をゆっくりと添加した。NaBH4を添加すると、赤煉瓦色の懸濁液は明褐色の透明な溶液に変化した。溶媒を真空中で除去し、粗生成物を最小量のCHCl3で取り出した。1時間後、褐色の沈殿を濾別し、溶媒を真空中で除去した。生成物をMeOH/H2Oから再結晶し、真空下で乾燥させた。
H2Ln(0.72mmol)を、シュレンク試験管中で乾燥THF(10mL)に溶解させた。溶液をZn(OAc)2(0.27g,1.48mmol)を入れた別のシュレンク試験管に移した。反応を攪拌しながら16時間、一晩続け、その後THFを真空中で除去し、生成物を乾燥CH2Cl2(10mL)中に取り出した。その後、溶液を濾過し、溶媒を真空中で除去し、白色粉末状の生成物を真空下で一晩乾燥させた。
H2L1とMg(OAc)2との錯体を、[L1Zn2(OAc)2]と同様に調製した。X線結晶構造解析、1Hおよび13C−NMRのデータから、生成した二金属マグネシウム錯体は、2つの異なる構造;1つは2つのアセテート基([L1Mg2(OAc)2])を有し、1つは架橋アセテート基によって結合された2つの配位子部分と1つの結合水分子とを含む二量体構造([L1 2Mg4(OAc)3(H2O)])である;の混合物であることが示唆された。前記二量体構造を図5に示す。前記二量体構造は、大環状配位子H2L1とMg(OAc)2との錯化中の水の不純物の存在によって生じる。Zn(OAc)2と異なって、Mg(OAc)2は無水の形態では市販されていない。錯化反応に使用する前に、市販のMg(OAc)2・4H2Oを真空下で100℃で乾燥させた。この乾燥は、すべての水を除去するには不十分であり、したがって、二量体錯体を生成させる水の由来を与えることがわかった。
H2L1(0.40g,0.72mmol)をシュレンク試験管中で乾燥THF(10mL)に溶解させた。溶液をMg(OAc)2(0.21g,1.48mmol)を入れた別のシュレンク試験管に移した。反応を撹拌しながら16時間、一晩続け、その後THFを真空中で除去し、生成物を乾燥CH2Cl2(10mL)で取り出した。次いで、溶液を濾過し、溶媒を真空中で除去し、白色粉末状の生成物を真空下で一晩乾燥させた。
Claims (17)
- 二酸化炭素とエポキシドとの共重合のための、式(I)の触媒:
R3はアルキレン、アリーレン、またはシクロアルキレンであり;
R4はH、アルキル、アリール、またはアルキルアリールであり;
E1はCであり、E2はO、SもしくはNHであるか、または、E1はNであり、E2はOであり;
XはOCOCH3、OCOCF3、OSO2C7H7、OSO(CH3)2、アルキル、アルコキシ、ハライド、またはアミドであり;
MはZn(II)、Cr(II)、Co(II)、Mn(II)、Mg(II)、Fe(II)、Cr(III)−X、Co(III)−X、Mn(III)−XまたはFe(III)−Xである。 - R1およびR2が独立して、水素、tBu、Me、CF3、フェニル、F、Cl、Br、I、NMe2、NEt2、NO2、OMe、OSiEt3 、CNまたはCCPhから選択される、請求項1に記載の触媒。
- R3が、エチレン、2,2−ジメチルプロピレン、プロピレン、ブチレン、フェニレン、シクロヘキシレンまたはビフェニレンである、請求項1または2に記載の触媒。
- R4が、H、Me、Et、Bn、iPr、tBuまたはPhである、請求項1〜3のいずれか1項に記載の触媒。
- Xが、OCOCH3、OCOCF3、OSO2C7H7、OSO(CH3)2、Et、Me、PhOEt、OMe、OiPr、OtBu、Cl、Br、I、F、N(iPr)2またはN(SiMe3)2である、請求項1〜4のいずれか1項に記載の触媒。
- 下記式から選択される構造を有する、請求項1〜5のいずれか1項に記載の触媒。
- 2つの単量体サブユニットおよび結合水分子を含み、各単量体サブユニットは、請求項1〜6のいずれか1項に記載の式(I)の触媒であり、この際、Xは、OCOCH3、OCOCF3、OSO2C7H7、OSO(CH3)2またはハライドであり、前記2つの単量体サブユニットは、架橋配位子Xによって連結される、二酸化炭素とエポキシドとの共重合のための、二量体触媒。
- 前記触媒が、下記の構造を有する、請求項7に記載の二量体触媒:
R1、R2、R3、R4、M、E1およびE2は、請求項1〜5のいずれかで定義された通りであり、Xは、OCOCH3、OCOCF3、OSO2C7H7、OSO(CH3)2またはハライドである。 - 前記触媒が、下記の構造を有する、請求項7または8に記載の二量体触媒。
- 請求項1〜6のいずれか1項に記載の式(I)の触媒と、請求項7〜9のいずれか1項に記載の二量体触媒との混合物であって、前記式(I)の触媒と前記二量体触媒を形成する単量体サブユニットとが同一の構造を有し、この際、Xは、OCOCH3、OCOCF3、OSO2C7H7、OSO(CH3)2またはハライドである、二酸化炭素とエポキシドとの共重合のための、混合物。
- 請求項1〜6のいずれか1項に記載の触媒、請求項7〜9のいずれか1項に記載の二量体触媒、または請求項10に記載の混合物の存在下で、二酸化炭素をエポキシドと反応させることを含む、ポリカーボネートの製造方法。
- 前記エポキシドが、シクロヘキセンオキシド、プロピレンオキシド、置換シクロヘキセンオキシド、アルキレンオキシド、または置換オキシランから選択される、請求項11に記載の方法。
- 1気圧で行なわれる、請求項11または12に記載の方法。
- 式(III)の化合物と、基MおよびXを含む金属錯体との反応を含む、請求項1〜6のいずれか1項に記載の触媒の製造方法:
- 式(III)の化合物と、基MおよびXを含む金属錯体との水の存在下での反応を含む、請求項7〜9のいずれか1項に記載の二量体触媒または請求項10に記載の混合物の製造方法:
- 前記反応が、塩基の存在下で起こる、請求項14または15に記載の方法。
- 前記塩基が、アミン塩基または水素化物塩基から選択される1以上である、請求項16に記載の方法。
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