A palladium-catalyzed chelation-assisted C–H olefination of 2-amino biaryls using readily available vinylsilanes as unactivated alkenes was developed to afford valuable arylated vinylsilanes with exclusive (E)-selectivities.
The invention relates to compounds of the formula
1
wherein
R is hydrogen, lower alkyl, lower alkoxy, halogen, amino, —N(R
6
)
2
or trifluoromethyl;
R
1
is hydrogen, lower alkoxy or halogen;
R and R
1
may be together —CH═CH—CH═CH—;
R
2
is halogen, lower alkyl or trifluoromethyl;
R
3
is hydrogen or lower alkyl;
R
4
is hydrogen or a cyclic tertiary amine, optionally substituted by lower alkyl;
R
5
is hydrogen, nitro, amino or —N(R
6
)
2
;
R
6
is hydrogen or lower alkyl;
X is —C(O)N(R
6
)—, —(CH
2
)
n
O—, —(CH
2
)—,—N(R
6
)—, —N(R
6
)C(O)— or —N(R
6
)(CH
2
)
n
—; and
n is I or 2;
and pharmaceutically acceptable acid addition salts thereof.
The compounds of formula I may be used for the treatment of diseases related to the NK-l receptor.