CN116265424A - 使用铂和碘或溴对烯烃进行加氢甲酰化的方法 - Google Patents

使用铂和碘或溴对烯烃进行加氢甲酰化的方法 Download PDF

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CN116265424A
CN116265424A CN202211612393.2A CN202211612393A CN116265424A CN 116265424 A CN116265424 A CN 116265424A CN 202211612393 A CN202211612393 A CN 202211612393A CN 116265424 A CN116265424 A CN 116265424A
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C·施奈德
R·杰克斯特尔
M·贝勒
R·弗兰克
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Abstract

本发明涉及使用铂和碘或溴对烯烃进行加氢甲酰化的方法。

Description

使用铂和碘或溴对烯烃进行加氢甲酰化的方法
技术领域
本发明涉及使用铂和碘或溴对烯烃进行加氢甲酰化的方法。
背景技术
C. Botteghi 等人,Journal of Molecular Catalysis A: Chemical 200,(2003), 147-156 描述了Pt(4,5-双(二苯基膦基)-9,9-二甲基氧杂蒽(Xantphos))Cl2用于2-甲苯磺酰氧基苯乙烯的加氢甲酰化的用途。
发明内容
本发明要解决的问题是提供一种新的加氢甲酰化方法。与使用Pt与Cl2的现有技术已知的方法相比,该方法在此应提供提高的产率。
该目的通过根据权利要求1所述的方法实现。
方法,包括以下方法步骤:
a) 预先加入烯烃;
b) 添加式(I)的化合物:
Figure 962429DEST_PATH_IMAGE001
其中R1、R2、R3、R4、R5、R6、R7、R8选自:-H、-(C1-C12)-烷基、-(C6-C20)-芳基,而R9、R10选自(C1-C12)-烷基、(C6-C20)-芳基; 和,如果 R1、R2、R3、R4、R5、R6、R7、R8、R9、R10是-(C6-C20)-芳基,那么芳环可以具有选自-(C1-C12)-烷基、-O-(C1-C12)-烷基的取代基;
c) 添加能够形成配合物的Pt化合物;
d) 添加碘化合物或溴化合物;
e) 引入CO和H2
f) 加热由步骤a)至e)获得的反应混合物,其中将烯烃转化为醛。
在此,方法步骤a)至e)可以按任何所需顺序进行。然而,通常情况下,CO和H2在预先加入步骤a)至d)中的反应参与物之后加入。
本文可以通过添加 PtI2或PtBr2在一个步骤中实施方法步骤c)和d)。
在该方法的一个优选的变化中,通过添加PtI2或PtBr2在一个步骤中添加Pt化合物和碘化合物或溴化合物。
术语(C1-C12)-烷基包括具有1至12个碳原子的直链和支链烷基。这些优选(C1-C8)-烷基,更优选(C1-C6)-烷基,最优选(C1-C4)-烷基。
合适的(C1-C12)-烷基特别是甲基、乙基、丙基、异丙基、正丁基、异丁基、仲丁基、叔丁基、正戊基、2-戊基、2-甲基丁基、3-甲基丁基、1,2-二甲基丙基、1,1-二甲基丙基、2,2-二甲基丙基、1-乙基丙基、正己基、2-己基、2-甲基戊基、3-甲基戊基、4-甲基戊基,1,1-二甲基丁基、1,2-二甲基丁基、2,2-二甲基丁基、1,3-二甲基丁基,2,3-二甲基丁基、3,3-二甲基丁基、1,1,2-三甲基丙基、1,2,2-三甲基丙基、1-乙基丁基、1-乙基-2-甲基丙基,正庚基、2-庚基,3-庚基、2-乙基戊基、1-丙基丁基、正辛基、2-乙基己基、2-丙基庚基、壬基、癸基。
术语(C6-C20)-芳基包括具有6至20个碳原子的单环或多环芳族烃基。这些优选(C6-C14)-芳基,更优选(C6-C10)-芳基。
合适的(C6-C20)-芳基特别是苯基、萘基、茚基、芴基、蒽基、菲基、并四苯基、䓛基、芘基、蒄基。优选的(C6-C20)-芳基是苯基、萘基和蒽基。
在该方法的一个变化中,R2、R3、R5、R6、R7、R8选自:-(C1-C12)-烷基、-(C6-C20)-芳基。
在该方法的一个变化中,R5、R6、R7、R8是-(C6-C20)-芳基。
在该方法的一个变化中,R5和 R6是不同的基团以及R7和R8 是不同的基团。
在该方法的一个变化中,R2和 R3是-(C1-C12)-烷基。
在该方法的一个变化中,R2和 R3是-CH3
在该方法的一个变化中,R1和 R4是-H。
在该方法的一个变化中,R9和 R10是-(C1-C12)-烷基。
在该方法的一个变化中,化合物(I)具有结构(1):
Figure 348411DEST_PATH_IMAGE002
在该方法的一个变化中,Pt化合物选自:Pt(II)I2、Pt(II)Br2、Pt(IV)I4、Pt(IV)Br4、二苯基(1,5-COD)Pt(II)、Pt(II)(acac)2、Pt(0)(PPh3)4、Pt(0)(DVTS) 溶液 (CAS:68478-92-2)、Pt(0)(乙烯)(PPh3)2、Pt(II)Br2(COD)、三(亚苄基丙酮)Pt(0)、Pt(II)(OAC)2溶液、Pt(0)(t-Bu)2、Pt(II)(COD)Me2、Pt(II)(COD)I2、Pt(IV)IMe3、Pt(II)(六氟乙酰丙酮合物)2
在该方法的一个变化中,Pt化合物选自:Pt(II)I2、Pt(II)Br2
在该方法的一个变化中,碘化合物或溴化合物选自:碱金属卤化物、碱土金属卤化物、NH4X、烷基卤化铵、二烷基卤化物(Dialkylhalogenid)、三烷基卤化物(Trialkylhalogenid)、四烷基卤化物(Tetraalkylhalogenid)和环烷基卤化铵。
在该方法的一个变化中,在方法步骤d)添加碘化合物。
在该方法的一个变化中,碘化合物是 Pt(II)I2
在该方法的一个变化中,碘化合物的加入量为0.1至10,基于Pt以当量测得。
在该方法的一个变化中,在方法步骤d)添加溴化合物。
在该方法的一个变化中,溴化合物是 Pt(II)Br2
在该方法的一个变化中,溴化合物的加入量为0.1至10,基于Pt以当量测得。
在该方法的一个变化中,该方法包括附加方法步骤e'):
e') 添加溶剂。
在该方法的一个变化中,溶剂选自:THF、DCM、ACN、庚烷、DMF、甲苯、Texanol、戊烷、己烷、辛烷、异辛烷、癸烷、十二烷、环己烷、苯、二甲苯、 Marlotherm、碳酸亚丙酯、MTBE、二甘醇二甲醚、三甘醇二甲醚、乙醚、二噁烷、异丙醇、叔丁醇、异壬醇、异丁醇、异戊醇、乙酸乙酯。
在该方法的一个变化中,溶剂选自:THF、DCM、ACN、庚烷、DMF、甲苯、Texanol。
在该方法的一个变化中,CO和H2在1 MPa(10巴)至6 MPa(60巴)的压力下引入。
在该方法的一个变化中,CO和H2在2 MPa (20 巴)至5 MPa(50 巴)的压力下引入。
在该方法的一个变化中,加热至25℃至150℃的温度。
在该方法的一个变化中,加热至30℃至130℃的温度。
在该方法的一个变化中,烯烃选自:乙烯、丙烯、1-丁烯、顺式-和/或反式-2-丁烯、异丁烯、1,3-丁二烯、1-戊烯、顺式-和/或反式-2-戊烯、2-甲基-1-丁烯、3-甲基-1-丁烯、2-甲基-2-丁烯、己烯、四甲基乙烯、庚烯、1-辛烯、2-辛烯、二正丁烯或其混合物。
具体实施方式
本发明将在下文中通过工作实施例进行详细说明。
实验描述
向小瓶中装入PtX2 (X=卤素)、配体和烘箱干燥的搅拌棒。然后用隔膜(PTFE涂覆的丁苯橡胶)和酚醛树脂盖密封小瓶。将小瓶抽真空并重新填充氩气三次。使用注射器将甲苯和1-辛烯添加到小瓶中。将小瓶置于合金板(Legierungsplatte)中,在氩气气氛下将其转移至Parr Instruments的4560系列高压釜中。用CO/H2吹扫高压釜三次后,在室温下将合成气压力增加至40巴。反应在80℃下进行18 h。反应结束后,将高压釜冷却至室温并小心减压。通过GC分析确定产率和选择性。
卤素的变化
Figure 128148DEST_PATH_IMAGE003
反应条件:
20 mmol的1-辛烯,0.5 mol% PtX2,2.0 当量的配体 (1),溶剂:甲苯,p(CO/H2):40巴,T:80℃,t:18 h。
产率:
配体 卤素 产率 [%]
Figure 867565DEST_PATH_IMAGE004
(1)
I / Br / Cl 96 / 24 / 0
如实验结果所示,该目的通过根据本发明的方法得以实现。

Claims (15)

1.方法,包括以下方法步骤:
a) 预先加入烯烃;
b) 添加式(I)的化合物:
Figure 832607DEST_PATH_IMAGE001
其中R1、R2、R3、R4、R5、R6、R7、R8选自:-H、-(C1-C12)-烷基、-(C6-C20)-芳基,而R9、R10选自(C1-C12)-烷基、(C6-C20)-芳基; 和如果 R1、R2、R3、R4、R5、R6、R7、R8、R9、R10是-(C6-C20)-芳基,那么芳环可以具有选自-(C1-C12)-烷基、-O-(C1-C12)-烷基的取代基;
c) 添加能够形成配合物的Pt化合物;
d) 添加碘化合物或溴化合物;
e) 引入CO和H2
f) 加热由步骤a)至e)获得的反应混合物,其中将所述烯烃转化为醛。
2.根据权利要求1所述的方法,
其中R2、R3、R5、R6、R7、R8选自:-(C1-C12)-烷基、-(C6-C20)-芳基。
3.根据权利要求1或2任一项所述的方法,
其中R5、R6、R7、R8 是-(C6-C20)-芳基。
4.根据权利要求1至3中任一项所述的方法,
其中R2和R3是-(C1-C12)-烷基。
5.根据权利要求1至4中任一项所述的方法,
其中R1和R4是-H。
6.根据权利要求1至5中任一项所述的方法,
其中R9和R10是-(C1-C12)-烷基。
7.根据权利要求1至6中任一项所述的方法,
其中所述化合物(I)具有结构 (1):
Figure 218589DEST_PATH_IMAGE002
8.根据权利要求1至7中任一项所述的方法,
其中所述Pt化合物选自:Pt(II)I2、Pt(II)Br2、Pt(IV)I4、Pt(IV)Br4、二苯基(1,5-COD)Pt(II)、Pt(II)(acac)2、Pt(0)(PPh3)4、Pt(0)(DVTS)溶液(CAS: 68478-92-2)、Pt(0)(乙烯)(PPh3)2、Pt(II)Br2(COD)、三(亚苄基丙酮)Pt(0)、Pt(II)(OAC)2溶液、Pt(0)(t-Bu)2、Pt(II)(COD)Me2、Pt(II)(COD)I2、Pt(IV)IMe3、Pt(II)(六氟乙酰丙酮合物)2
9.根据权利要求1至8中任一项所述的方法,
其中在方法步骤d)添加碘化合物。
10.根据权利要求9所述的方法,
其中所述碘化合物的加入量为0.1至10,基于Pt以当量测得。
11.根据权利要求1至8中任一项所述的方法,
其中在方法步骤d)添加溴化合物。
12.根据权利要求11所述的方法,
其中所述溴化合物的加入量为0.1至10,基于Pt以当量测得。
13.根据权利要求1至12中任一项所述的方法,
其包括附加方法步骤e'):
e') 添加溶剂。
14.根据权利要求1至13中任一项所述的方法,
其中CO和H2在1 MPa(10巴)至6 MPa(60巴)的压力下引入。
15.根据权利要求1至14中任一项所述的方法,
其中加热至25℃至150℃的温度。
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