Steric Tuning of the Amidomonophosphane-Rhodium(I) Catalyst in Asymmetric Addition of Arylboroxines to N-Phosphinoyl Aldimines
摘要:
Highly enantioselective rhodium-catalyzed addition of arylboroxines to N-phosphinoylaldi mines was realized by the steric tuning of a cliphenylphosphorus moiety to a di(o-tolyl) phosphorus moiety of a chiral amidomonophosphane. The presence of MS 4 A in a 5:1 solvent mixture of dioxane-propanol was essential to afford the corresponding diarylmethylamines in high yield.
Highly enantioselective rhodium-catalyzed addition of arylboroxines to N-phosphinoylaldi mines was realized by the steric tuning of a cliphenylphosphorus moiety to a di(o-tolyl) phosphorus moiety of a chiral amidomonophosphane. The presence of MS 4 A in a 5:1 solvent mixture of dioxane-propanol was essential to afford the corresponding diarylmethylamines in high yield.
PHOSPHACYCLE COMPOUND AND PROCESS FOR PRODUCTION THEREOF
申请人:Dow Global Technologies LLC
公开号:US20180291048A1
公开(公告)日:2018-10-11
The invention relates to oligomerization of olefins, such as ethylene, to higher olefins, such as a mixture of 1-hexene and 1-octene, using a catalyst system that comprises a) a source of chromium b) one or more activators and c) a phosphacycle-containing ligating compound. Additionally, the invention relates to a phosphacycle-containing ligating compound and a process for making said compound.