Novel 2,7-Dialkyl-Substituted 5(S)-Amino-4(S)-hydroxy-8-phenyl-octanecarboxamide Transition State Peptidomimetics Are Potent and Orally Active Inhibitors of Human Renin
摘要:
The action of renin is the rate-limiting step of the renin-angiotensin system (RAS), a key regulator of blood pressure. Effective renin inhibitors directly block the RAS entirely at source and, thus, may provide a vital weapon for hypertension therapy. Our efforts toward identifying novel small-molecule peptidomimetic renin inhibitors have resulted in the design of transition-state isosteres such as I bearing an all-carbon 8-phenyl-octanecarboxamide framework. Optimization of the extended P3 portion of I and extensive P2' modifications provided analogues with improved in vitro potencies in the presence of plasma. X-ray resolution of rhrenin/38a in the course of SAR work surprisingly unveiled the exploitation of a previously unexplored pocket (S3(SP)) important for strong binding affinities. Several inhibitors demonstrated oral efficacy in sodium-depleted marmosets. The most potent, 38a, induced dose-dependently a pronounced reduction in mean arterial blood pressure, paralleled by complete blockade of active plasma renin, up to 8 h post-dose. Oral bioavailability of 38a was 16% in marmosets.
A facile generation of C–S bonds via one-pot, odourless and efficient thia-Michael addition reactions using alkyl, aryl or allyl halides, thiourea and electron-deficient alkenes in wet polyethylene glycol (PEG 200) under mild reaction conditions
An efficient and odourless synthesis of thia-Michael adducts by the reaction of various organic halides (primary, secondary, tertiary, allylic, and benzylic), structurally diverse electron-deficient alkenes (ketones, esters, and acrylonitrile) and thiourea in the presence of sodium carbonate in wet polyethylene glycol (PEG 200) at 30–35 °C has been developed. This protocol is also a highly useful method
binary systems of a copper compound (or metallic compounds) and an isocyanide catalyze the Michael addition reaction. As the copper component, Cu2O, metallic copper and copper acetylacetonate are effectual, whereas CuCl, CuCl2, and CuO are ineffectual. The catalyst of copper isocyanide complex is characterized by the selective activation of cyano olefin compounds such as acrylonitrile. This was demonstrated
via a singlet oxygen pathway and has a high selectivity for aliphatic sulfides, whereas the oxidation of thioanisoles can be accomplished using an amine mediated electron transfer mechanism. The applicability of the fullerene nanodispersion as a general purpose photocatalyst was demonstrated in radical cyclization, boronic acid oxidation and imine formation reactions.
Lubricant compositions are provided, containing as antiwear agents, a .beta.-thiopropionitrile having the structure R--S--CH.sub.2 CH.sub.2 CN in which R is alkyl, nitriloalkyl, aralkyl, alkaryl, aryl, or benzothiazolyl, mercapto-thiadiazolyl, NCCH.sub.2 CH.sub.2 --X--(CH.sub.2).sub.n where X is oxygen or sulfur and n is a whole number from 1 to 20. Particularly contemplated are lubricating oils and greases containing the aforementioned antiwear agents.
Alkyl- und Arylsulfens�ureamide durch Cycloeliminierung von Alkenen aus Sulfimiden, 3: Bildung prim�rer und sekund�rer aliphatischer Sulfenamide des TypsRSNH2 bzw.RSNHR 1