摘要:
There is provided a novel compound of the general formula I in which each of R8 to R10 is hydrogen, aryl, C1-6 alkyl, trialkylsilyl or acyl; R1 to R5 are individually selected from hydrogen, hydroxy, C1-6 alkoxy and acyloxy; R6 and R7 are H, C1-4 alkyl, trialkylsilyl or acyl; X is O or NR, and R is H or Me; in which any of the alkyl groups including alkyl groups in alkoxy, acyl and acyloxy groups may be substituted by aryl, C1-4 alkyl, C1-4 alkoxy, hydroxyl, trialkylsiloxy or acyloxy groups; with the proviso that R2 and R3 are not both OH when R4 is H or OH, R1 and R5 are both H, and X is O. The amide compounds (X is NR) are analogues of epigallocatechin gallate or epicatechin galate, with an amide bond in place of the natural ester bond, with resistance to hydrolysis by esterase enzymes. The ester compounds (X is O) have a different hydroxylation pattern on the B ring as compared to the natural products. The compounds may be used to modulate the resistance to β-lactam antibiotics of various infections, especially methicillin resistant Staphylococcus aureus (MRSA). Pharmaceutical compositions containing the novel compounds and combinations of the novel compounds and β-lactam antibiotics are described.
摘要:
The present invention relates to synthetic green tea derived polyphenolic compounds, their modes of syntheses, and their use in inhibiting proteasomal activity and in treating cancers. The present invention is also directed to pharmaceutical compositions useful in methods of inhibiting proteasomes and of treating cancers.
摘要:
Bis- and tris-dihydroxyaryl compounds and their methylenedioxy analogs and pharmaceutically acceptable esters, their synthesis, pharmaceutical compositions containing them, and their use in the treatment of amyloid diseases, especially Aβ amyloidosis, such as observed in Alzheimer's disease, IAPP amyloidosis, such as observed in type 2 diabetes, AA/SAA amyloidosis, such as observed in systemic AA amyloidosis and synucleinopathies, such as observed in Parkinson's disease, and the manufacture of medicaments for such treatment.
摘要:
The invention concerns compounds of formula (I): R—A—R′ wherein: A is as defined in the description; R represents a group (V), (VI), (VII) or (VIII), where E, Q, R1, R2, R3, v and R4 are as defined in the description; R′ represents a —(CH2)t-R5 group wherein t and R5 are as defined in the description.
摘要:
A compound of the following formula (I) or (II) (in the formula (I), n represents an integer of 0 to 2) (in the formula (II), m represents an integer of 0 to 2).
摘要:
A compound represented by the following formula (I): wherein R1, R2 and R3each represents an aryl group, a heterocyclic group or an aliphatic hydrocarbon group, provided that at least one of R1, R2 and R3 represents an aryl group or a heterocyclic group and at least one of the aryl group and heterocyclic group contains a group represented by formula (II), R1, R2 and R3 may be linked to each other to form a ring, wherein R4, R5 and R6, each represents a hydrogen atom or a substituent; X1 represents an oxygen atom, a sulfur atom, N—RX1 or CRX2RX3; RX1, RX2,RX3 each represents a hydrogen atom or a substituent; R4, R5, R6 and X1 may be linked to each other to form a ring; Y represents an oxygen atom, a sulfur atom, or N—RY1; and RY1 represents a hydrogen atom or a substituent.
摘要翻译:由下式(I)表示的化合物:其中R 1,R 2和R 3各自表示芳基,杂环基 或脂族烃基,条件是R 1,R 2和R 3中的至少一个表示芳基或杂环基,并且 芳基和杂环基中的至少一个含有由式(II)表示的基团,R 1,R 2,R 3和R 3可以 彼此连接形成环,其中R 4,R 5和R 6各自表示氢原子或取代基; X 1表示氧原子,硫原子,N-R X 1或X 2 X 3 R 3 X 3; R X1,R X2,R X3各自表示氢原子或取代基; R 4,R 5,R 6和X 1可以彼此连接形成环; Y表示氧原子,硫原子或N-R Y1; R 1表示氢原子或取代基。
摘要:
The invention concerns compounds of formula (I): R—A—R′ wherein: A is as defined in the description; R represent, a group (V), wherein R′a and R″a are as defined in the description, or R forms with A a cyclic structure as defined in the description; R′ represents a (CH2)t—R2 group wherein q, t, and R2 are as defined in the description. The invention is useful for preparing medicines.
摘要:
A process is disclosed for the production of polyphenol oligomers having n polyphenol monomeric units, n being an integer from 2-18. The process includes coupling of a protected polyphenol, having protected phenolic hydroxyl groups, with a C-4 functionalized polyphenol monomer. The protected polyphenol may be a protected polyphenol monomer or a protected polyphenol oligomer having 2-17 monomeric units. Advantageously, polyphenol monomeric units forming the polyphenol oligomers may be the same or different flavanoid compounds.
摘要:
The invention relates to compounds of formula (I): and medicinal products containing the same are useful in treating or in preventing melatoninergic disorders.
摘要:
A process is disclosed for the production of polyphenol oligomers having n polyphenol monomers, n being an integer from 2-18. The process includes coupling of a protected polyphenol, having protected phenolic hydroxyl groups, with a C-4 functionalized polyphenol monomer. The protected polyphenol may be a protected polyphenol monomer or a protected polyphenol oligomer having 2-17 monomers. Advantageously, polyphenol monomers forming the polyphenol oligomers may be the same or different.