The coupling of primary and secondary unactivated alkyl bromides with alkyl-Grignard reagents was performed in good yields under mild conditions by using a new catalytic system: consisting of cobalt chloride and tetramethylethylenediamine (CoCl2⋅2 LiI, 4 TMEDA). The reaction is very chemoselective since ketone, ester and nitrile functions are tolerated.
Petrow et al., Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1959, p. 1091,1094;engl.Ausg.S.1053,1056
作者:Petrow et al.
DOI:——
日期:——
A New Protocol for the Enantioselective Synthesis of Methyl-Substituted Alkanols and Their Derivatives through a Hydroalumination/Zirconium-Catalyzed Alkylalumination Tandem Process We thank the National Science Foundation (CHE-0080795), the National Institutes of Health (GM36792), and Purdue University for support of this research. We also thank Albemarle and Boulder Chemical for assistance in the procurement of Al and Zr compounds, respectively.
PROCESSES FOR CONVERTING NAPHTHA TO DISTILLATE PRODUCTS
申请人:ExxonMobil Research and Engineering Company
公开号:US20200199041A1
公开(公告)日:2020-06-25
The present disclosure provides processes to convert heavy hydrocarbons to light distillates. The present disclosure further provides compositions including light distillates. In an embodiment, a process for upgrading a hydrocarbon feed includes dehydrogenating a C
3
-C
50
cyclic alkane and an C
2
-C
50
acyclic alkane in the presence of a dehydrogenation catalyst to form a C
3
-C
50
cyclic olefin and a C
2
-C
50
acyclic olefin. The process includes reacting the C
3
-C
50
cyclic olefin and the C
2
-C
50
acyclic olefin in the presence of a group 6 or group 8 transition metal catalysts to form a C
5
-C
200
olefin. The process further includes hydrogenating the C
5
-C
200
olefin in the presence of a hydrogenation catalyst to form a C
5
-C
200
hydrogenated product. Processes of the present disclosure may further include hydroisomerizing the C
5
-C
200
hydrogenated product in the presence of a hydroisomerization catalyst to form a C
5
-C
200
hydroisomerized product.