An efficient and practical methodology to obtain α-thio-β-dicarbonyl compounds was presented under alkaline conditions via potassium iodide (KI) catalysis.
2,9-diamino- and 2-amino-8-carbamoyl-4-hydroxy-alkanoic acid amide
申请人:Novartis Corporation
公开号:US05719141A1
公开(公告)日:1998-02-17
Compounds of the formula I ##STR1## in which R.sub.1 is arylamino, N-aryl-N-(lower alkoxy-lower alkyl)-amino, N-aryl-N-aryl-lower alkyl-amino or heterocyclyl bonded via a ring carbon atom, X is a carbonyl or methylene group, R.sub.2 and R.sub.3 independently of one another are hydrogen or lower alkyl or, together with the carbon atom with which they are bonded, are a cycloalkylidene radical, R.sub.4 is hydrogen, lower alkyl, lower alkanoyl or lower alkoxycarbonyl, R.sub.5 is hydroxyl, lower alkanoyloxy or lower alkoxycarbonyloxy, R.sub.6 is hydrogen, lower alkyl, lower alkenyl, lower alkynyl, cycloalkyl, cycloalkyl-lower alkyl, aryl-lower alkyl or heteroaryl-lower alkyl having 5 to 7 ring atoms in the heteroaryl ring and R.sub.7 is hydrogen or lower alkyl, or R.sub.6 and R.sub.7, together with the carbon atom with which they are bonded, are a cydoalkylidene radical and R.sub.8 denotes an aliphatic, cycloaliphatic-aliphatic or heteroarylaliphatic radical, and their salts can be used as active ingredients for medicaments for treatment of high blood pressure.
Disclosed is a compound represented by the formula: ##STR1## wherein R.sup.1 : CH.sub.2, CH.sub.2 CH.sub.2, CH.sub.2 O, CH.sub.2 S, CH.sub.2 SO; R.sup.2 : hydrogen atom, a lower alkyl group having 1 to 4 carbon atoms or a benzyl group; n: an integer of 1 to 4; R.sup.3 : COOR.sup.4, NHCOR.sup.5, CONR.sup.6 R.sup.7, PO.sub.3 H.sub.2, SO.sub.3 H. The compound shows potent antirheumatic function, psoriasis curing function and carcinostatic function and has low toxicity whereby it is available as a medicine.
An oxidative cyclization ensued upon interaction of Morita–Baylis–Hillman (MBH) ketones with 2-aminothiophenol in the presence of Cs2CO3, resulting in the formation of new 2,2-disubstituted dihydro-1,4-benzothiazines. The reaction features an aza-Michael addition and an oxidative cyclization involving the formation of a carbon–sulfur bond and works well over a wide range of MBH ketones to deliver the
A compound represented by general formula (A), which is useful as a medicine because it has potent antirheumatic, psoriasis curing and anticancer actions and a reduced toxicity, wherein R¹ represents CH₂, CH₂CH₂, CH₂O, CH₂S or CH₂SO; R² represents hydrogen, C₁ to C₄ lower alkyl or benzyl; R³ represents COOR⁴, NHCOR⁵, CONR⁶R⁷, PO₃H₂ or SO₃H; and n represents an integer of 1 to 4.