摘要:
A method of preparing optically active isocoumarin-3-yl-acetic acid derivatives represented by Formula (I): wherein a specific isocoumarin-ketene derivative is subjected to an addition reaction with an optically active alcohol, and then the ester thus obtained is subjected to a hydrolysis reaction. An intermediate for synthesis used therein. A method of preparing isocoumarin-3-yl-acetic acid derivatives represented by Formula (III): wherein a specific isocoumarin derivative is subjected to an addition reaction with carbon monoxide and oxygen in the presence of a transition metal catalyst. An intermediate for synthesis used therein.
摘要:
The invention provides a multistep synthesis for the preparation of 4,5-diamino shikimic acid derivatives of formula starting from an isophtalic acid derivative of formula 4,5-Diamino shikimic acid derivatives are potent inhibitors of viral neuraminidase.
摘要:
Compounds containing two aromatic systems covalently linked through a linker containing one or more atoms, or "linker" defined as including a covalent bond per se so as to space the aromatic systems at a distance 1.5-15 ANGSTROM , are effective in treating conditions associated with bone deficits. The compounds can be administered to vertebrate subjects alone or in combination with additional agents that promote bone growth or that inhibit bone resorption. They can be screened for activity prior to administration by assessing their ability to effect the transcription of a reporter gene coupled to a promoter associated with a bone morphogenetic protein and/or their ability to stimulate calvarial growth in model animal systems.
摘要:
The invention relates to the use of compounds of formula (I) and of their salts and stereoisomers in the production of medicaments for treating cardiovascular diseases.
摘要:
The present invention relates to new photoactive polymers, their use as liquid crystal (LC) orientation layers and their use in the construction of unstructured and structured optical and electro-optical elements and multi-layer systems. The new photoactive polymers are crosslinkable polymers that can be readily cross linked over a relatively short irradiation time.
摘要:
A compound of formula (I), wherein G?1 and G2¿ independently represent a polymerisable mesogenic residue; X represents a group selected from -CH¿2?-, -O-, -CO-, -COO-, -OOC-, -CONR'-, -OCOO-, -OCONR'; Sp represents a group of the formula -(CH2)p- in which p is an integer of 1 to 18 and in which one or two non adjacent -CH2- groups are optionally replaced by -CH=CH-; or in which one or two -CH2- groups are optionally replaced by one or two groups selected from the group consisting of -O-, -CO-, -COO-, -OOC-, -CONR'-, -OCOO-, -OCONR' with the proviso that firstly the spacer group does not contain two adjacent heteroatoms and secondly when X is -CH2-, p can also have a value of 0; and M represents an achiral group of formula (II) in which A and B independently represent an optionally substituted six membered isocyclic or heterocyclic group or naphthalenediyl; C is selected from the group consisting of an optionally substituted five and six membered isocyclic or heterocyclic group or naphthalenediyl; n?1 and n2¿ are 0 or 1 with the proviso that firstly 1≤n1+n2≤2 and secondly, when C is naphthalenediyl 0≤n1+n2≤2; Z1 is selected from the group consisting of -O-, -COO-, -OOC-, -CO-, -CONR'-, -NR'CO-, OCOO-, -OCONR'-, -NR'COO- and a single bond; in which R' is selected from the group consisting of hydrogen, a lower achiral alkyl group and a lower achiral alkenyl group; Z?2 and Z3¿ are independently selected from the group consisting of single bond, -COO-, -OOC-, -CH¿2?-CH2-, -CH2O-, -OCH2-, -CH=CH-, -C C-, -(CH2)4- and -(CH2)3O-; and R?1¿ is selected from the group consisting of -CN, -COR, -COOR, -OCOR, -CONR'R, -NR'COR, OCOOR, -OCONR'R, -NR'COOR, -F, -Cl, -CF¿3?, -OCF3, -OR and -R in which R is selected from the group consisting of hydrogen, an achiral C1-18 alkyl group and an achiral C4-18 alkenyl group with the double bond at 3-position or higher; and R' is as defined above; with the proviso that at most one of the rings A, B and C is a naphthalenediyl group is provided as well as liquid crystalline mixtures, films and electro-optical devices comprising the compound.