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
Platelet Aggregation Inhibiting and Anticoagulant Effects of Oligoamines, XIX: 4,4′-Phenylene-bis-sydnone Imines
作者:Klaus Rehse、Michael Kämpfe、Antje Martens
DOI:10.1002/ardp.19933260309
日期:——
Fourteen 4,4′‐m‐phenylene‐ and two 4,4′‐p‐phenylene‐bis‐sydnone imine hydrochlorides have been synthesized. All compounds exhibited good solubility in water. In the m‐series the 3‐(3‐phenylpropyl)‐derivative 5c and the 3‐hexyl compound 51 showed antiplatelet activities at or below 10 μmol/L (IC50, Born‐test with collagen). The corresponding p‐compounds had the same (61) or slightly lower (6c) activity
hydrogen-deuterium (H-D) exchange reaction on the benzylic site proceeded in D2O in the presence of a small amount of H2 gas. The use of the Pd/C-ethylenediamine complex [Pd/C(en)] as a catalyst instead of Pd/C led to the efficient deuterium incorporation into the benzylic site of O-benzyl protective groups without hydrogenolysis. These H-D exchange reactions provide a post synthetic and D(2)-gas-free deuterium-labeling
A method for efficient and extensive H/Dexchange of substituted benzenederivatives which is catalyzed by heterogeneous Pd/C in D(2)O as a deuterium source under hydrogen atmosphere is described. Multi-deuterium incorporation into unactivated linear or branched alkyl chains that bear a carboxyl, hydroxyl, ether, ester, or amide moiety and are connected with a benzene ring was achieved by using the