Mechanism of the Pyridine-Modified Cobalt-Catalyzed Hydromethoxycarbonylation of 1,3-Butadiene
摘要:
The pyridine-modified cobalt-catalyzed hydromethoxycarbonylation of 1,3-butadiene (1) starts by the disproportionation of CO(2)(8)((CO)) (to [CoPy)(][CO(CO))(])(6)(4)(2) (followed by the formation of HCo(CO))(4) ((3). The addition of 3 to 1 leads to CH)(CH=CHCH)(Co(CO))(3)(2)(4) ((4), which, depending on the conditions, can undergo facile CO insertion to yield CH)(CH=CHCH)(COCo(CO))(3)(2)(4) ((5) or reversible decarbanylation to form h3-C)(H)(Co(CO))(4)(7)(3) (7). Pyridine accelerates the conversion of 7 to methyl-3-pentenoate (2) and the methanolysis of 5.
Mechanism of the Pyridine-Modified Cobalt-Catalyzed Hydromethoxycarbonylation of 1,3-Butadiene
摘要:
The pyridine-modified cobalt-catalyzed hydromethoxycarbonylation of 1,3-butadiene (1) starts by the disproportionation of CO(2)(8)((CO)) (to [CoPy)(][CO(CO))(])(6)(4)(2) (followed by the formation of HCo(CO))(4) ((3). The addition of 3 to 1 leads to CH)(CH=CHCH)(Co(CO))(3)(2)(4) ((4), which, depending on the conditions, can undergo facile CO insertion to yield CH)(CH=CHCH)(COCo(CO))(3)(2)(4) ((5) or reversible decarbanylation to form h3-C)(H)(Co(CO))(4)(7)(3) (7). Pyridine accelerates the conversion of 7 to methyl-3-pentenoate (2) and the methanolysis of 5.