A catalytic version of hypervalent aryl-λ3-iodane-induced Hofmann rearrangement of primary carboxamides: iodobenzene as an organocatalyst and m-chloroperbenzoic acid as a terminal oxidant
Various cobalt pincer type complexes 1–6 were applied for the catalytic hydrogenation of nitriles to amines. Among these, catalyst 4 is the most efficient, allowing the reduction of aromatic as well as aliphaticnitriles in moderate to excellent yields.
Bis-[4-(R-amino)-1-pyridinium]alkanes are prepared by reacting a 4-(R-amino)pyridine with an appropriate disubstituted alkane. The compounds are useful as antimicrobial agents. Certain species are also useful as dental plaque-preventive agents.
Platelet Aggregation Inhibiting and Anticoagulant Effects of Oligoamines, XX: 4,4′,4″-(1,3,5)-Benzene-tris-sydnone Imines
作者:Klaus Rehse、Antje Martens
DOI:10.1002/ardp.19933260407
日期:——
derivatives, unknown up to now, is described. All compounds are alkyl or arylalkyl substituted in 3‐position of the sydnone imine. The most powerful agent was the 3‐propyl derivative 6c. It inhibits the aggregation of human platelets induced by collagen in a concentration of 1 γmol/L half maximally. Its N‐ethoxycarbonyl derivative 7c, which was designed as a prodrug, showed only small antithrombotic effects
Platelet Aggregation Inhibiting and Anticoagulant Effects of Oligoamines, XXI: 4,4′-Alkylene-bis-sydnone Imines
作者:Klaus Rehse、Antje Martens
DOI:10.1002/ardp.19933260511
日期:——
their antiplatelet (Born‐test, collagen) and anticoagulant (Quick‐test) activity in vitro. The most active compounds were found in the ethylene and propylene series. The most favourable substituents in 3‐position of the sydnone were hexyl to octyl or phenylethyl to phenylbutyl groups. Six compounds exhibit an IC50 ≤ 10 μmol/L against plateletaggregation. Three compounds showed an IC75 ≤ 200 μmol/L