Polymer-carrying optically active binaphthyl type oxazoline compound
申请人:Takasago International Corporation
公开号:US20040097738A1
公开(公告)日:2004-05-20
A polymer-carrying optically active binaphthyl type oxazoline compound having axial asymmetry, represented by the following general formula (1)
1
(wherein R
1
and R
2
may be the same or different from each other and each represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms or the like; R
3
is a hydrogen atom or —R
5
—X—R
6
; R
4
is a hydrogen atom or the like; R
5
is a straight- or branched-chain aliphatic hydrocarbon chain which may have a directly or indirectly bonded substituent; X is CH
2
, CO
2
, O, CONR
7
or NR
7
; R
6
is a directly or indirectly bonded polymer; and R
7
is a hydrogen atom or the like), and to a transition metal complex which uses the compound as the ligand.
Synthesis of Dihydrobenzofurans via Palladium-Catalyzed Annulation of 1,3-Dienes by <i>o</i>-Iodoaryl Acetates
作者:Roman V. Rozhkov、Richard C. Larock
DOI:10.1021/jo100495t
日期:2010.6.18
palladium-catalyzed annulation of 1,3-dienes by o-iodoaryl acetates provides an efficient approach to biologically interesting dihydrobenzofurans. The annulation is believed to proceed via (1) oxidative addition of the aryl iodide to Pd(0), (2) syn-addition of the resulting arylpalladium complex to the 1,3-diene, (3) intramolecular coordination of the phenolic oxygen to the Pd center, (4) hydrolysis of the acetyl
Palladium-Carbene Catalysts for Aerobic, Intramolecular Wacker-Type Cyclisation Reactions
作者:Kilian Muñiz
DOI:10.1002/adsc.200404172
日期:2004.10
A catalyst derived from in situ complexation of N-heterocyclic carbenes to palladium bistrifluoroacetate promotes efficient intramolecularWacker-typecyclisationreactions under aerobic conditions. A variety of 2-allylphenols undergo oxidative conversion to dihydrobenzofurans.
Palladium-Catalyzed Oxidative Wacker Cyclizations in Nonpolar Organic Solvents with Molecular Oxygen: A Stepping Stone to Asymmetric Aerobic Cyclizations
作者:Raissa M. Trend、Yeeman K. Ramtohul、Eric M. Ferreira、Brian M. Stoltz
DOI:10.1002/anie.200351196
日期:2003.6.30
DAVID, M.;SAULEAU, J.;SAULEAU, A., TETRAHEDRON, 44,(1988) N 12, 3587-3594