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Synthesis and Characterization of Poly(tetramethyl-1,4-silphenylenesiloxane) Derivatives with Oxyethylene Substituent on Phenylene Moiety

โœ Scribed by Nobukatsu Nemoto; Yoshie Watanabe; Jun Umemiya; Yumiko Otomo

Publisher
Springer
Year
2006
Tongue
English
Weight
380 KB
Volume
57
Category
Article
ISSN
0170-0839

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โœ Raafat M. Shaker ๐Ÿ“‚ Article ๐Ÿ“… 2006 ๐Ÿ› John Wiley and Sons โš– 23 KB ๐Ÿ‘ 1 views

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Synthesis and characterization of some n
Synthesis and characterization of some new 4,4โ€ฒ-(1,4-phenylene)dipyrimidine and 6,6โ€ฒ-(1,4-phenylene)-di(pyridin-2(1H)-one) derivatives
โœ Raafat M. Shaker ๐Ÿ“‚ Article ๐Ÿ“… 2005 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 88 KB

A series of new 4,4 -(1,4-phenylene)dipyrimidines 5a-c, 8a-c, and 10a,b have been synthesized from the reaction of amidines 1a-c with the dienaminone 2, bis-chalcone 6, or ylidenemalononitrile 9. The reaction of malononitrile and ethyl cyanoacetate with 2 gave 6,6 -(1,4-phenylene)di(pyridin-2(1H)-on