Table 4.

Substitution of 1 with aromatic compounds.

	Aromatic Compound a	Isolated Yield of 6 / % b	Isolated Yield of 7 / % c
a	toluene	0	80.8
b	anisole	0	95.8
c	o-xylene	0	76.5
d	m-xylene	Trace	45.3 d
e	p-xylene	0	0
f	1,3,5-trimethylbenzene	35.3	Trace
g	chlorobenzene	0	0
h	benzene	0	0

^a All reactions were performed according to the procedure described in the text; ^b,c All reactions were continued until complete disappearance of the starting material 1; ^d Overall yield of the structural isomeric mixture of 1,4-adducts.