Substituent-dependent reactivity in aldehyde transformations: 4-(phenylethynyl)benzaldehydes versus simple benzaldehydes
作者:Isamu Katsuyama、Pandurang V. Chouthaiwale、Hai-Lei Cui、Yuji Ito、Ayumi Sando、Hiroaki Tokiwa、Fujie Tanaka
DOI:10.1016/j.tet.2013.03.056
日期:2013.5
Effects of substituents on transformations of 4-(phenylethynyl)benzaldehydes and related benzaldehydes were analyzed in aldol and thiazolidine formation reactions. The aldol reaction of 4-cyanobenzaldehyde was 54-fold faster than that of 4-methoxybenzaldehyde. In contrast, the aldol reaction of 4-(4-cyanophenylethynyl)benzaldehyde was only 1.4-fold faster than that of 4-(4-methoxyphenylethynyl)benzaldehyde
New therapeutically active and selective heterocyclic compounds that are inhibitors of the enzyme DPP-IV
申请人:——
公开号:US20010031780A1
公开(公告)日:2001-10-18
Described are compounds of formula I
1
wherein at least one of the bonds in the five-membered ring is a double bond; B is any alpha or beta amino acid connected to the ring with an amide or peptide bond; or a salt thereof with a pharmaceutically acceptable acid or base. Pharmaceutical compositions containing these compounds are also described. These compounds are useful for treating type II diabetes.
Therapeutically active and selective heterocyclic compounds that are inhibitors of the enzyme DPP-IV
申请人:——
公开号:US20020103384A1
公开(公告)日:2002-08-01
Described are compounds of formula I
1
wherein at least one of the bonds in the five-membered ring is a double bond; B is any alpha or beta amino acid connected to the ring with an amide or peptide bond; or a salt thereof with a pharmaceutically acceptable acid or base. Pharmaceutical compositions containing these compounds are also described. These compounds are useful for treating type II diabetes.
Discovery of 2-Arylthiazolidine-4-carboxylic Acid Amides as a New Class of Cytotoxic Agents for Prostate Cancer
作者:Veeresa Gududuru、Eunju Hurh、James T. Dalton、Duane D. Miller
DOI:10.1021/jm049208b
日期:2005.4.1
To improve the selectivity and antiproliferative activity of previously reported serine amide phosphates (SAPs), we designed a new series of 4-thiazolidinone amides, in which the 4-thiazolidinone moiety was introduced as a phosphate mimic. However, these 4-thiazolidinone derivatives demonstrated less cytotoxicity in prostate cancer cells despite improved selectivity over RH7777 cells. To further optimize the thiazolidinone analogues in terms of cytotoxicity and selectivity, we made closely related structural modifications, which led us to the discovery of a new class of 2-arylthiazolidine-4-carboxylic acid amides. These compounds were potent cytotoxic agents with IC50 values in the low micromolar concentration range and demonstrated enhanced selectivity in receptor-negative cells compared to SAPs and 4-thiazolidinone amides.