1,4-Dihydropyridine derivatives, and pharmaceutical method of the same
申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US04284634A1
公开(公告)日:1981-08-18
1,4-dihydropyridine derivatives of the general formula ##STR1## having vasodilating and anti-hypertensive activity, processes for preparing same, and pharmaceutical compositions thereof for treating cardiovascular diseases.
2-thio or oxo-4-aryl or heterocyclo-1,5(2H)-pyrimidinedicarboxylic acid
申请人:E. R. Squibb & Sons, Inc.
公开号:US05202330A1
公开(公告)日:1993-04-13
Pyrimidine compounds of the formula ##STR1## wherein X is sulfur or oxygen, Y is R.sub.11 or --O--R.sub.1, and R.sub.4 is aryl or heterocyclo are disclosed. These compounds are useful as cardiovascular agents, particularly anti-hypertensive agents, due to their calcium entry blocking vasodilator activity.
A simple method for the preparation of functionalized trisubstituted alkenes and α,β,γ,δ-unsaturated carbonyl compounds by using natural amino acid l-tryptophan
作者:Ying Hu、Yan-Hong He、Zhi Guan
DOI:10.1016/j.catcom.2010.01.016
日期:2010.3
reactive acetylacetone and ethyl acetoacetate. The reactions were carried out at room temperature and gave good yields. It is a convenient entry for preparation of functionalizedtrisubstituted alkenes and α,β,γ,δ-unsaturated carbonyl compounds.
Enzyme catalytic promiscuity: The papain-catalyzed Knoevenagel reaction
作者:Wen Hu、Zhi Guan、Xiang Deng、Yan-Hong He
DOI:10.1016/j.biochi.2011.09.018
日期:2012.3
Knoevenagel reactions in DMSO/water. A wide range of aromatic, hetero-aromatic and α,β-unsaturated aldehydes could react with less active methylene compounds acetylacetone and ethyl acetoacetate. The products were obtained in moderate to excellent yields with Z/E selectivities of up to 100:0. This case of biocatalytic promiscuity not only widens the application of papain to new chemical transformations
Metal free biomimetic deaminative direct C–C coupling of unprotected primary amines with active methylene compounds
作者:Santanu Ghosh、Chandan K. Jana
DOI:10.1039/c9ob02163a
日期:——
unprecedented direct C–C coupling reaction of unprotected primary amines with active methylene compounds is reported. The reaction involves a biomimetic deamination of amines which was achieved under conditions free of metallic reagents and strong oxidizing agents. A wide range of primary amines was reacted with different active methylene compounds to provide structurally diverse trisubstituted alkenes and