Metal-free construction of tricyclic or tetracyclic compounds—acid-promoted synthesis of benzo[4,5]imidazo[2,1-a]isoindole and 1,2-dialkyl-2,3-dihydrobenzimidazoles
摘要:
An environmental friendly, efficient, and easy to operate strategy for synthesizing of benzo[4,5]imidazo [2,1-a]isoindole and 1,2-dialkyl-2,3-dihydrobenzimidazoles via acid-promoted coupling of dialdehyde and o-diaminobenzene under metal-free conditions is described. A series of products were generated in good yields under mild conditions. (C) 2012 Elsevier Ltd. All rights reserved.
HETEROCYCLIC COMPOUND AND p27Kip1 DEGRADATION INHIBITOR
申请人:Uchida Hiroshi
公开号:US20130079306A1
公开(公告)日:2013-03-28
A novel heterocyclic compound or a salt thereof useful for selectively inhibiting the degradation of p27
Kip1
is provided. The compound or the salt thereof is represented by the following formula (1):
wherein A represents an alkyl group, a cycloalkyl group, an aryl group or a heterocyclic group, the group A may have a substituent; the ring B represents a 5- to 8-membered monocyclic heterocyclic ring or a condensed ring containing the monocyclic heterocyclic ring, the ring B may have a substituent; the ring C represents an aromatic ring, the ring C may have a substituent; L represents a linker comprising a main chain having 3 to 5 atoms selected from the group consisting of a carbon atom, a nitrogen atom, an oxygen atom and a sulfur atom, wherein at least one atom in the main chain is a hetero atom selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom, the linker L may have a substituent; and n is 0 or 1.
Reactivity-Controlled Regioselectivity: A Regiospecific Synthesis of 1,2-Disubstituted Benzimidazoles
作者:Xiaohu Deng、Neelakandha S. Mani
DOI:10.1002/ejoc.200901056
日期:2010.2
combination of N 1 /N 2 chemoselectivity on the amidine and reactivity-controlled X 1 /X 2 chemoselectivity on the 1,2-dihaloarene. This reaction proves to be fairly general for the regiospecificsynthesis of 1,2-substituted benzimidazoles.