Electrosyntheses of high-quality polyphenanthrene in the electrolyte of boron trifluoride diethyl etherate containing trifluoroacetic acid

2007 ◽  
Vol 45 (17) ◽  
pp. 3929-3940 ◽  
Author(s):  
Guangming Nie ◽  
Xuejun Han ◽  
Shusheng Zhang ◽  
Qingli Wei
Keyword(s):  
Trifluoroacetic Acid ◽  
Boron Trifluoride ◽  
High Quality ◽  
Boron Trifluoride Diethyl Etherate

The oxidative conversion of (E)-α-(Arylmethylene)benzeneacetates into substituted phenanthrenes: the propitious use of boron trifluoride with vanadium trifluoride oxide

1984 ◽  
Vol 37 (10) ◽  
pp. 2119 ◽  
Author(s):  
B Halton ◽  
AI Maidment ◽  
DL Officer ◽  
JM Warnes
Keyword(s):  
Trifluoroacetic Acid ◽  
Boron Trifluoride ◽  
Oxidative Conversion ◽  
Boron Trifluoride Diethyl Etherate ◽  
Oxygen Functionality

Vanadium trifluoride oxide (VOF3)/boron trifluoride diethyl etherate is especially useful for effecting the cyclization of the (E)-α-(arylmethy1ene)benzeneacetates (4a,b,d) to the substituted phenanthrenes (5a,b,d). The products are obtained in 20% higher yield and under milder conditions than by employing the vanadium reagent with trifluoroacetic acid. A survey of the derivatives (4a-n) has shown that oxygen functionality is necessary at the 3- and 4- and/or the 3'- and 4'-positions of (4) for cyclization to occur.

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