Production of imidazole derivatives and novel intermediates of the derivatives
申请人:Sakamoto Yasuhiko
公开号:US20050043277A1
公开(公告)日:2005-02-24
An improvement in the production of imidazole derivatives including histamine H
3
agonist immepip and histamine H
3
antagonist VUF4929. Desired imidazole derivatives can be easily obtained in high yield by using novel intermediates represented by the general formula (I): (I) wherein R
1
is an amino-protecting group; R
2
and R
3
are each independently hydrogen, lower alkyl, or hydroxylated lower alkyl; R
4
is lower alkyl, halogenated lower alkyl, or substituted or unsubstituted phenyl; and A is C
1-3
alkylene.
IMPROVEMENT IN THE PRODUCTION OF IMIDAZOLE DERIVATIVES AND NOVEL INTERMEDIATES OF THE DERIVATIVES
申请人:Azwell Inc.
公开号:EP1477487A1
公开(公告)日:2004-11-17
The invention provides an improvement in the production of imidazole derivatives including histamine H3 agonist immepip and histamine H3 antagonist VUF4929. Desired imidazole derivatives can be easily obtained in high yield by using novel intermediates represented by the general formula (I):
wherein R1 is an amino-protecting group; R2 and R3 are each independently hydrogen, lower alkyl, or hydroxy-(lower alkyl); R4 is lower alkyl, halogenated lower alkyl, or substituted or unsubstituted phenyl; and A is C1-3 alkylene.
An Efficient and Convenient Synthesis of 4-Vinylimidazoles Using a Novel Horner-Wadsworth-Emmons (HWE) Reagent: Synthetic Studies Toward Novel Histamine H3-Ligands
A novel Horner-Wadsworth-Emmons (HWE)-type reagent 1 reacted readily with various aldehydes and ketones to produce (E)-vinylimidazoles 2 in good yields. The synthetic utility of 1 was demonstrated by the efficient preparation of four histamine H 3 ligands 3 by simple hydrogenation of 2.