Chemoselective esterification of α-hydroxyacids catalyzed by salicylaldehyde through induced intramolecularity
作者:Shiue-Shien Weng、Hsin-Chun Li、Teng-Mao Yang
DOI:10.1039/c2ra23068b
日期:——
direct and chemoselective esterification of α-hydroxyacids was developed using a reversible covalent-binding strategy. By taking advantage of acetal chemistry, simple aldehydes can be used to efficientlycatalyze the esterification of α-hydroxy carboxylic acids in the presence of β-hydroxyacid moieties or other carboxylic acids in amounts equal to or in excess of the alcohols. A diverse array of α-aryl
Synthesis of α-Hydroxycarboxylic Acids from Various Aldehydes and Ketones by
Direct Electrocarboxylation: A Facile, Efficient and Atom Economy Protocol
In present work, the formation of α-hydroxycarboxylic acids have been described from various aromatic aldehydes and ketones via direct electrocarboxylation method with 80-92% of yield without any side product and can be purified by simple recrystallization using sacrificial Mg anode and Pt cathode in an undivided cell, CO2 at (1 atm) was continuously bubbled in the cell throughout the reaction using
The invention is concerned with novel substituted benzimidazole derivatives of formula (I)
wherein R
1
to R
10
are as defined in the description and in the claims, as well as physiologically acceptable salts and esters thereof. These compounds can be used as medicaments.
Compounds of the invention are useful in inhibiting thrombin and associated thrombotic occlusions having the following structure Formula (I): wherein u is CH or N; Q is 1)—N(R
25
)CH(R
30
)—wherein the nitrogen atom is attached to R
1
, and R
25
and R
30
are independently selected from the group consisting of hydrogen, C
3-6
cycloalkyl, and C
1-6
alkyl, or 2) wherein the nitrogen atom is attached to R
1
, and m is 0, 1, or 2.
1
3,6-Disubstituted Azabicyclo (3.1.0) Hexane Derivatives as Muscarinic Receptor Antagonists
申请人:Salman Mohammad
公开号:US20080319043A1
公开(公告)日:2008-12-25
The present invention generally relates to muscarinic receptor antagonists, which are useful, among other uses, for the treatment of various diseases of the respiratory, urinary and gastrointestinal systems mediated through muscarinic receptors. The invention also relates to the process for the preparation of disclosed compounds, pharmaceutical compositions containing the disclosed compounds, and the methods for treating diseases mediated through muscarinic receptors.