
TY  - JOUR
A1  - Launikonis, A 
A1  - Sasse, WHF 
A1  - Willing, IR 
T1  - The Action of Trifluoromethanesulfonic Acid on Naphthalene
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1993
VL  - 46
IS  - 4
SP  - 427
EP  - 440
KW  - 
UR  - https://doi.org/10.1071/CH9930427 
N2  - Trifluoromethanesulfonic ( triflic ) acid reacts with naphthalene at room temperature to give a complex mixture from which five products have been isolated and identified as follows: (E)-3-benzylidene-2,3-dihydro-1H-benz[e]indene (2) (yield 15-20%), 1,2,3,4-tetrahydroanthracene (7) (c. 0.5%), 4-phenyl-1,2-dihydroanthracene (8), 3,4-dihydro-1,2&#8242;-binaphthyl (9a&#8242;), 4-(2-naphthyl)-1,2-dihydroanthracene (10) [yields of (8), (9a&#8242;) and (10) each less than 0.1%]. Also formed is (Z)-2-benzylidene-1,3-dihydro-1H-benz[e]indene (6) which is formed reversibly from (2) by the action of triflic acid. Mechanisms are proposed for the formation of these products. 
ER  -

