New chiral π-conjugated polymers based on a (1R,2R)-diiminocyclohexane chiral unit with weak interchain π stacking
New chiral π-conjugated polymers consisting of alternating conjugated segments and (1R,2R)-diiminocyclohexane units with C2 symmetry were prepared by a palladium-catalyzed coupling reaction, they exhibited very high specific optical rotations ([α] up to -3000°) and strong Cotton effects ([θ] 106 deg cm2 mol-1).
Lere-Porte, Jean-Pierre,Moreau, Joel J. E.,Serein-Spirau, Francoise,Wakim, Salem
One catalyst for two distinct reactions: Sequential asymmetric hetero Diels-Alder reaction and diethylzinc addition
This paper describes the successful development of a series of chiral zinc catalysts containing (R)-3,3′-Br2-BINOL ligand and various diimine activators for enantioselective HDA reaction of Danishefsky's diene with aldehydes through a combinato
Du, Haifeng,Zhang, Xue,Wang, Zheng,Ding, Kuiling
p. 9465 - 9477
(2007/10/03)
An easy and clean synthesis of chiral 3,4-diaryl-2,5-diazabicyclo[4.4.0]decanes by reductive intramolecular coupling of chiral diimines
A clean and efficient reductive intramolecular coupling of diimines prepared from (1R,2R)-cyclohexanediamine gave chiral 2,3-diarylpiperazines.
Hesemann, Peter,Moreau, Joel J. E.,Soto, Thierry
p. 183 - 189
(2007/10/03)
Electronic effects on the acidity of phosphorus(III) triflates
A range of chiral phosphorus(III) triflates has been prepared and their donor-acceptor behaviour towards the representative donor 4-phenylpyridine investigated. Correlations between 31P-NMR shifts, relative binding strengths (Kr) and
Renard, Sylvie L.,Kee, Terence P.
p. 516 - 521
(2007/10/03)
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