CN109384672A - 用甲酸和甲醇的甲氧基羰基化 - Google Patents

用甲酸和甲醇的甲氧基羰基化 Download PDF

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CN109384672A
CN109384672A CN201810890313.7A CN201810890313A CN109384672A CN 109384672 A CN109384672 A CN 109384672A CN 201810890313 A CN201810890313 A CN 201810890313A CN 109384672 A CN109384672 A CN 109384672A
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桑睿
刘劼
董开武
R.雅克施特尔
M.贝勒
R.弗兰克
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Abstract

本发明涉及用甲酸和甲醇的甲氧基羰基化方法。所述方法包括以下方法步骤:a)加入烯烃;b)加入含Pd的化合物,其中Pd能够形成络合物;c)加入通式(I)化合物:(I)其中R1、R2、R3、R4各自彼此独立地选自:‑H、‑(C1‑C12)‑烷基、‑O‑(C1‑C12)‑烷基、‑(C4‑C14)‑芳基、‑O‑(C4‑C14)‑芳基、环烷基、‑(C1‑C12)‑杂烷基、‑O‑(C1‑C12)‑杂烷基、‑(C3‑C14)‑杂芳基、‑O‑(C3‑C14)‑杂芳基、‑COO‑烷基、‑COO‑芳基、‑C‑O‑烷基、‑C‑O‑芳基、NH2、卤素和也能够形成更大的稠合环的基团;其中所述烷基、芳基、环烷基、杂烷基、杂芳基可以如下被取代了的:‑(C1‑C12)‑烷基、‑O‑(C1‑C12)‑烷基、卤素;并且基团R1、R2、R3、R4中的至少一个不代表苯基;d)加入MeOH;e)加入HCOOH,其中基于2mmol烯烃,所用体积在0.3ml至0.8ml的范围内;f)加热反应混合物,其中烯烃被转化为甲酯。

Description

用甲酸和甲醇的甲氧基羰基化
本发明涉及用甲酸和甲醇的甲氧基羰基化方法。
烯烃的甲氧基羰基化是日益重要的工艺。在传统的甲氧基羰基化中,烯烃在包含配体和金属的催化剂存在下与CO和MeOH反应:
在此,将CO作为气体引入反应容器中。
本发明的目的是提供一种其中采用除CO气体之外的CO源的方法,该CO源被引入反应容器中。在该方法中应实现良好产率的甲酯。
该目的通过根据权利要求1的方法实现。
方法,其包括以下方法步骤:
a)加入烯烃;
b)加入含Pd的化合物,其中Pd能够形成络合物;
c)加入通式(I)化合物:
(I)
其中R1、R2、R3、R4各自彼此独立地选自:-H、-(C1-C12)-烷基、-O-(C1-C12)-烷基、-(C4-C14)-芳基、-O-(C4-C14)-芳基、环烷基、-(C1-C12)-杂烷基、-O-(C1-C12)-杂烷基、-(C3-C14)-杂芳基、-O-(C3-C14)-杂芳基、-COO-烷基、-COO-芳基、-C-O-烷基、-C-O-芳基、NH2、卤素和也能够形成更大的稠合环的基团;
其中所述烷基、芳基、环烷基、杂烷基、杂芳基可以如下被取代了的:
-(C1-C12)-烷基、-O-(C1-C12)-烷基、卤素;
并且基团R1、R2、R3、R4中的至少一个不代表苯基;
d)加入MeOH;
e)加入HCOOH,
其中基于2mmol烯烃,所用体积在0.3ml至0.8ml的范围内;
f)加热反应混合物,其中烯烃被转化为甲酯。
在该方法的一个变型方案中,没有CO气体导入反应混合物中。
在该方法的一个变型方案中,HCOOH用作反应的唯一CO源。
在该方法的一个变型方案中,方法步骤b)中的化合物选自:
Pd(acac)2、PdCl2、Pd(dba)3*CH3Cl(dba =二亚苄基丙酮)、Pd(OAc)2、Pd(TFA)2、Pd(CH3CN)Cl2
在该方法的一个变型方案中,方法步骤b)中的化合物是Pd(OAc)2
在该方法的一个变型方案中,该方法包括额外的方法步骤g):
g)加入酸。
在该方法的一个变型方案中,所述酸选自:H2SO4、CH3SO3H、CF3SO3H、PTSA(对甲苯磺酸)。
在该方法的一个变型方案中,所述酸是PTSA(对甲苯磺酸)。
在该方法的一个变型方案中,基于2mmol烯烃,所用的HCOOH体积在0.4ml至0.6ml的范围内。
在该方法的一个变型方案中,R1、R2、R3、R4各自彼此独立地选自:-(C1-C12)-烷基、-O-(C1-C12)-烷基、-(C4-C14)-芳基、-O-(C4-C14)-芳基、环烷基、-(C1-C12)-杂烷基、-O-(C1-C12)-杂烷基、-(C3-C14)-杂芳基、-O-(C3-C14)-杂芳基、-COO-烷基、-COO-芳基、-C-O-烷基、-C-O-芳基、NH2、卤素和也能够形成更大的稠合环的基团;
其中所述烷基、芳基、环烷基、杂烷基、杂芳基可以如下被取代了的:
-(C1-C12)-烷基、-O-(C1-C12)-烷基、卤素;
并且基团R1、R2、R3、R4中的至少一个不代表苯基。
在该方法的一个变型方案中,R1、R2、R3、R4各自彼此独立地选自:-(C1-C12)-烷基、-(C4-C14)-芳基、环烷基、-(C1-C12)-杂烷基、-(C3-C14)-杂芳基、卤素和也能够形成更大的稠合环的基团;
其中所述烷基、芳基、环烷基、杂烷基、杂芳基可以如下被取代了的:
-(C1-C12)-烷基、-O-(C1-C12)-烷基、卤素;
并且基团R1、R2、R3、R4中的至少一个不代表苯基。
在该方法的一个变型方案中,R1、R2、R3、R4各自彼此独立地选自:-(C1-C12)-烷基、环烷基、-(C3-C14)-杂芳基和也能够形成更大的稠合环的基团;
其中所述烷基、环烷基、杂芳基可以如下被取代了的:
-(C1-C12)-烷基、-O-(C1-C12)-烷基、卤素,
并且基团R1、R2、R3、R4中的至少一个不代表苯基。
在该方法的一个变型方案中,R1、R4各自彼此独立地选自:-(C1-C12)-烷基、环烷基和也能够形成更大的稠合环的基团;
其中所述烷基、环烷基可以如下被取代了的:
-(C1-C12)-烷基、-O-(C1-C12)-烷基、卤素。
在该方法的一个变型方案中,R2、R3各自彼此独立地代表-(C3-C14)-杂芳基,
其中所述杂芳基可以如下被取代了的:
-(C1-C12)-烷基、-O-(C1-C12)-烷基、卤素。
在该方法的一个变型方案中,通式(I)化合物具有结构(II):
(II)。
下面借助实施例更详细地阐述本发明。
用HCOOH对四甲基乙烯1a进行Pd催化的甲氧基羰基化:所用的HCOOH体积的影响
将[Pd(OAc)2](1.12mg,0.25mol%)、(II)(8.72mg,1.0mol%)、对甲苯磺酸(PTSA·H2O)(15.2mg,4mol%)和烘箱干燥的搅拌棒放入密封的35ml小管中。将小管与盖子一起放入具有大开口的长Schlenk管中。将Schlenk管抽真空三次并再次用氩气填充。在氩气氛下,借助注射器将1a(2mmol)、MeOH(1.5ml)和HCOOH(Xml)(X参见表1)注入35ml小管中。然后用盖子密封35ml小管。反应在100℃下进行13小时以上。在反应结束后,在没有额外冷却的情况下使小管达到室温,并小心地减压。然后注入异辛烷(100μl)作为内标。通过GC分析测量转化率。
结果总结在下表1中:
表1:
如上述试验所示,该目的通过根据本发明的方法实现。

Claims (13)

1.方法,其包括以下方法步骤:
a)加入烯烃;
b)加入含Pd的化合物,其中Pd能够形成络合物;
c)加入通式(I)化合物:
(I)
其中R1、R2、R3、R4各自彼此独立地选自:-H、-(C1-C12)-烷基、-O-(C1-C12)-烷基、-(C4-C14)-芳基、-O-(C4-C14)-芳基、环烷基、-(C1-C12)-杂烷基、-O-(C1-C12)-杂烷基、-(C3-C14)-杂芳基、-O-(C3-C14)-杂芳基、-COO-烷基、-COO-芳基、-C-O-烷基、-C-O-芳基、NH2、卤素和也能够形成更大的稠合环的基团;
其中所述烷基、芳基、环烷基、杂烷基、杂芳基可以如下被取代了的:
-(C1-C12)-烷基、-O-(C1-C12)-烷基、卤素;
并且基团R1、R2、R3、R4中的至少一个不代表苯基;
d)加入MeOH;
e)加入HCOOH,
其中基于2mmol烯烃,所用体积在0.3ml至0.8ml的范围内;
f)加热反应混合物,其中烯烃被转化为甲酯。
2.根据权利要求1所述的方法,其中没有CO气体导入反应混合物中。
3.根据权利要求1或2所述的方法,其中HCOOH用作反应的唯一CO源。
4.根据权利要求1至3中任一项所述的方法,其中方法步骤b)中的化合物选自:Pd(acac)2、PdCl2、Pd(dba)3*CH3Cl(dba =二亚苄基丙酮)、Pd(OAc)2、Pd(TFA)2、Pd(CH3CN)Cl2
5.根据权利要求1至4中任一项所述的方法,其中所述方法包括额外的方法步骤g):
g)加入酸。
6.根据权利要求5所述的方法,其中所述酸选自:H2SO4、CH3SO3H、CF3SO3H、PTSA。
7.根据权利要求1至6中任一项所述的方法,其中基于2mmol烯烃,所用的HCOOH体积在0.4ml至0.6ml的范围内。
8.根据权利要求1至7中任一项所述的方法,其中R1、R2、R3、R4各自彼此独立地选自:-(C1-C12)-烷基、-O-(C1-C12)-烷基、-(C4-C14)-芳基、-O-(C4-C14)-芳基、环烷基、-(C1-C12)-杂烷基、-O-(C1-C12)-杂烷基、-(C3-C14)-杂芳基、-O-(C3-C14)-杂芳基、-COO-烷基、-COO-芳基、-C-O-烷基、-C-O-芳基、NH2、卤素和也能够形成更大的稠合环的基团;
其中所述烷基、芳基、环烷基、杂烷基、杂芳基可以如下被取代了的:
-(C1-C12)-烷基、-O-(C1-C12)-烷基、卤素;
并且基团R1、R2、R3、R4中的至少一个不代表苯基。
9.根据权利要求1至8中任一项所述的方法,其中R1、R2、R3、R4各自彼此独立地选自:-(C1-C12)-烷基、-(C4-C14)-芳基、环烷基、-(C1-C12)-杂烷基、-(C3-C14)-杂芳基、卤素和也能够形成更大的稠合环的基团;
其中所述烷基、芳基、环烷基、杂烷基、杂芳基可以如下被取代了的:
-(C1-C12)-烷基、-O-(C1-C12)-烷基、卤素;
并且基团R1、R2、R3、R4中的至少一个不代表苯基。
10.根据权利要求1至9中任一项所述的方法,其中R1、R2、R3、R4各自彼此独立地选自:-(C1-C12)-烷基、环烷基、-(C3-C14)-杂芳基和也能够形成更大的稠合环的基团;
其中所述烷基、环烷基、杂芳基可以如下被取代了的:
-(C1-C12)-烷基、-O-(C1-C12)-烷基、卤素,
并且基团R1、R2、R3、R4中的至少一个不代表苯基。
11.根据权利要求1至10中任一项所述的方法,其中R1、R4各自彼此独立地选自:-(C1-C12)-烷基、环烷基和也能够形成更大的稠合环的基团;
其中所述烷基、环烷基可以如下被取代了的:
-(C1-C12)-烷基、-O-(C1-C12)-烷基、卤素。
12.根据权利要求1至11中任一项所述的方法,其中R2、R3各自彼此独立地代表-(C3-C14)-杂芳基,
其中所述杂芳基可以如下被取代了的:
-(C1-C12)-烷基、-O-(C1-C12)-烷基、卤素。
13.根据权利要求1至12中任一项所述的方法,其中通式(I)化合物具有结构(II):
(II)。
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