Lithiated dimethylaminomethyl ferrocenes and ruthenocenes
摘要:
Dimethylaminomethylferrocenyl lithium and -ruthenocenyl lithium were generated using tin/lithium exchange reactions. The four different metallocenyl lithium compounds were analysed using NMR spectroscopy. The metallocenyl lithium reagents are useful reagents and have been shown to react with MeOD, ClSiMe3 and DMF to give air-stable derivatives. (c) 2005 Elsevier B.V. All rights reserved.
An Enantioselective Oxidative C–H/C–H Cross-Coupling Reaction: Highly Efficient Method To Prepare Planar Chiral Ferrocenes
作者:De-Wei Gao、Qing Gu、Shu-Li You
DOI:10.1021/jacs.6b00127
日期:2016.3.2
A Pd-catalyzed, asymmetric oxidative cross-coupling reaction between ferrocenes and heteroarenes is described. The process, which takes place via a twofold C-H bond activation pathway, proceeds with modest to high efficiencies (36-86%) and high levels of regio- and enantioselectivity (95-99% ee). In the reaction, air oxygen serves as a green oxidant and excess amounts of the coupling partners are not
NOVEL CARBONYLATION LIGANDS AND THEIR USE IN THE CARBONYLATION OF ETHYLENICALLY UNSATURATED COMPOUNDS
申请人:Eastham Graham Ronald
公开号:US20100113255A1
公开(公告)日:2010-05-06
Novel bidentate ligands of general formula (I) are described Formula (I): R represents a hydrocarbyl aromatic structure. The substituent(s) Yx on the aromatic structure has a total X=1-
n
ΣtY
X
of atoms other than hydrogen such that
X-1-n
ΣtY
X
is 4 where n is the total number of substituent(s) Y
X
and tY
X
represents the total number of atoms other than hydrogen on a particular substituent Y
X
. The groups X
1
, X
2
, X
3
and X
4
are joined to Q
1
or Q
2
via tertiary carbon atoms to the respective atom Q
1
or Q
2
; and Q
1
and Q
2
each independently represent phosphorus, arsenic or antimony. A catalyst system and a process for the carbonylation of ethylenically unsaturated compounds utilising the catalyst system is also described.