Palladium-Catalyzed, Atmospheric Pressure Carbonylation of Allylic Chlorides in Two-Phase Aqueous Sodium Hydroxide–Organic Solvent Media

1988 ◽  
Vol 17 (6) ◽  
pp. 957-960 ◽  
Author(s):  
Jitsuo Kiji ◽  
Tamon Okano ◽  
Wataru Nishiumi ◽  
Hisatoshi Konishi
Keyword(s):  
Organic Solvent ◽  
Sodium Hydroxide ◽  
Atmospheric Pressure ◽  
Aqueous Sodium Hydroxide ◽  
Two Phase ◽  
Aqueous Sodium ◽  
Organic Solvent Media ◽  
Palladium Catalyzed

scholarly journals A new protocol for the synthesis of 4,7,12,15-tetrachloro[2.2]paracyclophane

2016 ◽  
Vol 12 ◽  
pp. 2443-2449 ◽  
Author(s):  
Donghui Pan ◽  
Yanbin Wang ◽  
Guomin Xiao
Keyword(s):  
Organic Solvent ◽  
Sodium Hydroxide ◽  
Anion Exchange ◽  
Organic Waste ◽  
Silver Oxide ◽  
Sodium Hydroxide Solution ◽  
Aqueous Sodium Hydroxide ◽  
Product Yield ◽  
Aqueous Sodium Hydroxide Solution ◽  
Aqueous Sodium

We report a green and convenient protocol to prepare 4,7,12,15-tetrachloro[2.2]paracyclophane, the precursor of parylene D, from 2,5-dichloro-p-xylene. In the first bromination step, with H2O2–HBr as a bromide source, this procedure becomes organic-waste-free and organic-solvent-free and can appropriately replace the existing bromination methods. The Winberg elimination–dimerization step, using aqueous sodium hydroxide solution instead of silver oxide for anion exchange, results in a significant improvement in product yield. Furthermore, four substituted [2.2]paracyclophanes were also prepared in this convenient way.

L'o-nitrobenzylidènediméthylsulfuranne: synthèse, réactivité

1985 ◽  
Vol 63 (11) ◽  
pp. 2958-2960
Author(s):  
Yannick Le Stanc ◽  
Maurice Le Corre
Keyword(s):  
Aqueous Solution ◽  
Sodium Hydroxide ◽  
Aqueous Sodium Hydroxide ◽  
Two Phase ◽  
Aqueous Sodium ◽  
Nitrobenzyl Alcohol

In aqueous solution, o-nitrobenzyldimethylsulfonium bromide and the corresponding ylid give, depending upon the conditions, o-nitrobenzyl alcohol, o-nitrobenzylsulfide, or methyl o-hydroxymethylbenzyl sulfide. The o-nitrophenyloxiranes may be obtained by the reaction of nitrobenzylidenedimethylsulfurane with aldehydes in a two-phase aqueous sodium hydroxide/dichloromethane system.

scholarly journals Triple Helix of Scleroglucan in Dilute Aqueous Sodium Hydroxide

1981 ◽  
Vol 13 (12) ◽  
pp. 1135-1143 ◽  
Author(s):  
Toshio Yanaki ◽  
Takemasa Kojima ◽  
Takashi Norisuye
Keyword(s):  
Sodium Hydroxide ◽  
Triple Helix ◽  
Aqueous Sodium Hydroxide ◽  
Aqueous Sodium
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