
TY  - JOUR
A1  - Halton, B 
A1  - Maidment, AI 
A1  - Officer, DL 
A1  - Warnes, JM 
T1  - The oxidative conversion of (E)-&#945;-(Arylmethylene)benzeneacetates into substituted phenanthrenes: the propitious use of boron trifluoride with vanadium trifluoride oxide
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1984
VL  - 37
IS  - 10
SP  - 2119
EP  - 2128
KW  - 
UR  - https://doi.org/10.1071/CH9842119 
N2  - Vanadium trifluoride oxide (VOF3)/boron trifluoride diethyl etherate is especially useful for effecting the cyclization of the (E)-&#945;-(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. 
ER  -

