1239442-65-9

Upstream product

• 60356-11-8 cyano(1,4-dioxaspiro[4.5]dec-8-ylidene)acetic acid ethyl ester 
• 334002-79-8 lithium 4-isopropylphenoxide 
• 83928-84-1 7-cyano-7-(ethoxycarbonyl)-1,4-benzoquinonemethide 
• 83928-82-9 4-[1'-cyano-1'-(ethoxycarbonyl)methylene]cyclohexanone 
• 105-56-6 ethyl 2-cyanoacetate 

Relevant academic research and scientific papers

Stereocontrol of optically active polymer by asymmetric anionic polymerization of 7-cyano-7-ethoxycarbonyl-1,4-benzoquinone methide

Asymmetric anionic polymerization of a prochiral quinone methide monomer, 7-cyano-7-ethoxycarbonyl-1,4-benzoquinone methide (1), was examined using two chiral anionic initiators, lithium 4-isopropylphenoxide (iPrPhOLi)/(- )-sparteine((-)-Sp) and iPrPhOLi/(S)-(-)-2,2′- isopropylidenebis(4-phenyl-2-oxazoline) ((-)-PhBox) initiators, in a mixture solution of dichloromethane/toluene (30/70 in vol %), and optical activities of the resulting polymers and oligomers (1-mer and 2-mer) were investigated in detail. On asymmetric anionic polymerization of 1 with iPrPhOLi/(-)- Sp initiator, stereoselectivity was quite low on both initiation and propagation reactions, while in the case of iPrPhOLi/(-)-PhBox initiator, stereoselectivity was quite low on the initiation reaction, but the propagation reaction proceeded stereoselectively, resulting in an optically active polymer of 1 (poly(1)) with a large positive specific rotation.

Asymmetric anionic polymerizations of 7-cyano-7-alkoxycarbonyl-1,4- benzoquinone methides

Asymmetric anionic polymerizations of 7-cyano-7-alkoxycarbonyl-1,4- benzoquinone methides (1) with various alkoxy groups were performed using chiral initiators such as lithium isopropylphenoxide (iPrPhOLi)/(S)-(-)-2, 2′-isopropylidene-bis(4-phe