Tris(benzotriazol-1-yl)methane: A<sup>-</sup>CO<sub>2</sub>H Synthon for the Preparation of Carboxylic Acids
作者:Alan R. Katritzky、Zhijun Yang、Jamshed N. Lam
DOI:10.1055/s-1990-26975
日期:——
Lithiation of tris(benzotriazol-1-yl)methane 16 gives the tris(benzotriazolyl)methyl carbanion 17 which affords substitution products 18 with many electrophiles. Acidic hydrolysis of 18 affords the corresponding carboxylic acids 19 in good yield. The syntheses of several α-functionalized carboxylic acids are described.
Aminophenoxyacetic acid derivatives and pharmaceutical composition containing thereof
申请人:——
公开号:US20040063748A1
公开(公告)日:2004-04-01
There is provided an aminophenoxyacetic acid derivative of the following formula (I):
1
wherein, R
1
, R
2
, R
3
and R
4
are, independent from each other, alkoxy group, alkyl group or aryl group, etc.; E
1
and E
2
are oxygen atom, sulfur atom, etc.; n is 0 to 5; X and Y are alkylene group, cycloalkylen group, or alkenylen group; Q is pheny group which may be substituted or benzoyl group, etc,
or a pharmaceutically acceptable salt thereof.
These compounds have neuroprotective effects by inducing calbindin D28Kd, one of Ca
2+
-binding proteins.