Regioselective C–H alkenylation of imidazoles and its application to the synthesis of unsymmetrically substituted benzimidazoles
作者:Hyeongwoo Kim、Ye Ji Hwang、Inhyuk Han、Jung Min Joo
DOI:10.1039/c8cc02405g
日期:——
A palladium-catalyzed C–H alkenylation of imidazoles has been developed. High C5 selectivity was achieved for C2-unsubstituted and C2-substituted imidazoles usingoxygen and copper(II) acetate, respectively, as oxidants. The obtained products were applied to benzannulation through a sequence involving transposition of N-alkyl groups to give C4-alkenyl imidazoles, alkenylation, thermal 6π-electrocyclization
Phenylethynyl and styryl derivatives of imidazole and fused ring heterocycles
申请人:——
公开号:US20020128263A1
公开(公告)日:2002-09-12
This invention relates to a compound and the use of the compound of the formula
1
wherein R
1
, R
2
, R
3
, R
4
and R
5
are as defined in the description, A signifies —CH═CH— or —C≡C—; and B signifies
2
wherein R
6
to R
26
, X and Y are as defined in the specification or a pharmaceutically acceptable salt thereof, for use in pharmaceutical compositions for the treatment or prevention of mGluR5 receptor mediated disorders.