Adamantane derivatives in the prevention and treatment of cerebral
申请人:Merz + Co. GmbH & Co.
公开号:US05061703A1
公开(公告)日:1991-10-29
A method for the prevention and treatment of cerebral ischemia using an adamantane derivative of the formula ##STR1## wherein R.sub.1 and R.sub.2 are identical or different, representing hydrogen or a straight or branched alkyl group of 1 to 6 C atoms or, in conjunction with N, a heterocyclic group with 5 or 6 ring C atoms; wherein R.sub.3 and R.sub.4 are identical or different, being selected from hydrogen, a straight or branched alkyl group of 1 to 6 C atoms, a cycloalkyl group with 5 or 6 C atoms, and phenyl; wherein R.sub.5 is hydrogen or a straight or branched C.sub.1 -C.sub.6 alkyl group, or a pharmaceutically-acceptable salt thereof, is disclosed.
Inductive, Hyperconjugative and Frangomeric Effects in the Solvolysis of 1-Substituted 3-Bromoadamantanes. Polar effects IV
作者:Walter Fischer、Cyril A. Grob
DOI:10.1002/hlca.19780610510
日期:1978.7.12
Three kinds of polar substitutent effects are observable in the solvolyses of 1-R-substituted 3-bromoadamantanes (VI). This follows from the relationship between products, rate constants k in 80% ethanol, and the inductive substituent constants σ of the substituent R. Alkyl groups and electron-attracting substituents at C (1) control the rate by their inductive effects alone, since logk correlates closely
Amidoadamantanes and Method for Producing the Same
申请人:Schreiner Peter R.
公开号:US20090299096A1
公开(公告)日:2009-12-03
The invention relates to 1-formamido-adamantane derivatives of formula (I), which carry the substituents R
1
, R
2
or R
3
in 3, 5 and/or 7 position, the substituents being defined as follows: hydrogen, a linear or branched alkyl, alkenyl or alkinyl group with up to 6 C atoms, an aliphatic or aromatic, cyclic or heterocyclic hydrocarbon group with up to 10 carbon atoms, and formamides of hydrocarbons from the group of diamondoids, for example diamantane, triamantane, tetramantane and pentamantane, however, with the exception of 1-formamido-3,5-dimethyladamantane. The invention also relates to a method for the direct formation of formamide or acetamide of adamantane, adamantane derivatives with the aforementioned definition of substituents or of a hydrocarbon from the group of diamondoids, characterized by reacting the adamantane, the adamantane derivative or the diamondoid with formamide, acetamide or acetonitrile in concentrated acids, while avoiding SO
3
containing sulfuric acid or 100% azotic acid.
[EN] ADAMATANE DERIVATIVES FOR THE TREATMENT OF FILOVIRUS INFECTION<br/>[FR] DÉRIVÉS D'ADAMATANE POUR LE TRAITEMENT D'UNE INFECTION À FILOVIRUS
申请人:ARISAN THERAPEUTICS
公开号:WO2017127306A4
公开(公告)日:2017-09-14
Electronic control of face selection in the capture of radicals
作者:Vani R. Bodepudi、William J. Le Noble
DOI:10.1021/jo00006a009
日期:1991.3
A simple procedure is described which leads to the pure epimeric 2-(5-phenyl)adamantanecarboxylic acids E-1 and Z-1. Both acids upon treatment with bromine and mercuric oxide in carbon tetrachloride undergo the Hunsdiecker reaction to give the same mixture of E- and Z- 2-bromo-5-phenyladamantanes 4. 5-Phenyl-2-methyleneadamantane 6 undergoes reaction with bromotrichloromethane to give two diastereomeric adducts. In both instances, the major isomer results from the abstraction of a bromine atom by the zu face of the intermediate 5-phenyl-2-adamantyl radicals. The results mesh with other examples of face selection which we have previously ascribed to transition-state hyperconjugation. An additional case (hydride shift in a carbocation) was encountered in this work, as well as one apparent exception: the oxirane formation from adamantanone and sulfonium ylids. That result is attributed to thermodynamic control of the initial addition step.