An efficient and one-pot synthesis of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles catalyzed by InCl3·3H2O
作者:Saikat Das Sharma、Parasa Hazarika、Dilip Konwar
DOI:10.1016/j.tetlet.2008.02.053
日期:2008.3
InCl3·3H2O was found to be a mild and effective catalyst for the efficient, one-pot, three component synthesis of 2,4,5-trisubstituted imidazoles at room temperature. Moreover, the utility of this protocol was further explored conveniently for the one-pot, four component synthesis of 1,2,4,5-tetrasubstitutedimidazoles in high yields.
Highly efficient and eco-friendly synthesis of 2-alkyl and 2-aryl-4,5-diphenyl-1H-imidazoles under mild conditions
作者:David I. MaGee、M. Bahramnejad、Minoo Dabiri
DOI:10.1016/j.tetlet.2013.03.008
日期:2013.5
Highlyefficient one-pot reactions of benzil or benzoin, ammonium acetate, and aliphatic or aromatic aldehydes were carried out in water in the presence of 1-methylimidazolium trifluoroacetate ([Hmim]TFA) under mild and green conditions. This approach can be useful for the three-component synthesis of 2-alkyl- and 2-aryl-4,5-diphenyl-1H-imidazoles in high yields. By conducting the reactions in aqueous
The condensation of an α-hydroxy ketone with an aldehyde and ammonium acetate in the presence of diacetoxy iodobenzene (DIB) produced the corresponding imidazole in excellent yield.
ESTER-TYPE EPOXY FURAN RESIN AND MANUFACTURING METHOD THEREFOR, RESIN COMPOSITION, AND CURED RESIN PRODUCT
申请人:SEKISUI CHEMICAL CO., LTD.
公开号:US20170335053A1
公开(公告)日:2017-11-23
The ester-type epoxy furan resin of the present invention is represented by the following general formula (1).
(In the general formula (1), R
1
is an alkylene group having 2 to 6 carbon atoms optionally containing a hydroxy group; R
2
and R
3
are each an alkyl group having 1 to 4 carbon atoms, and R
2
and R
3
may be bonded to each other to form a cyclic structure; n is 0 to 300; and a plurality of R
1
, R
2
, and R
3
, if present within the molecule, may be mutually the same or different.)
Quinuclidine derivatives binding to mucarinic m3 receptors
申请人:Collingwood Paul Stephen
公开号:US20070060563A1
公开(公告)日:2007-03-15
Compounds of formula I
in salt or zwitterionic form wherein, wherein R
1
, R
2
, R
3
, and R
4
have the meanings as indicated in the specification, are useful for treating conditions that are mediated by the muscarinic M3 receptor. Pharmaceutical compositions that contain the compounds and a process for preparing the compounds are also described.