The present invention relates to liquid-crystalline media comprising one or more compounds of formula DFS ##STR00001##
in which the groups and parameters occurring have the meanings indicated in claim 1, to high-frequency components comprising same, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular for microwave phased-array antennas. The present invention further relates to novel mesogenic compounds.

The present invention relates to liquid-crystalline media comprising one or more compounds of formula DFS ##STR00001##
in which the groups and parameters occurring have the meanings indicated in claim 1, to high-frequency components comprising same, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular for microwave phased-array antennas. The present invention further relates to novel mesogenic compounds.

The present invention relates to aromatic isothiocyanates of formula U

##STR00001##

as defined in claim 1, to liquid-crystalline media comprising one or more compounds of formula U and to high-frequency components comprising these media, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, tunable filters, tunable metamaterial structures, and electronic beam steering antennas, e.g. phased array antennas.

The present invention relates to aromatic isothiocyanates of formula U

##STR00001##

as defined in claim 1, to liquid-crystalline media comprising one or more compounds of formula U and to high-frequency components comprising these media, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, tunable filters, tunable metamaterial structures, and electronic beam steering antennas, e.g. phased array antennas.

The invention relates to compounds of general formula (I) and pharmaceutically acceptable salts thereof: (I) wherein Ri is selected from an SCN— group or is an RCONH— group; in particular, where Ri=RCONH, R is selected from an aromatic benzene ring substituted with an SCN— group in the ortho, meta or para position, according to the following formula: SCN— or R is a C1-C4 alkyl chain, substituted with an SCN— group; n can be equal to 0 or else 1. The invention also relates to the use of such compounds for the treatment of osteoporosis and in general of bone pathologies characterised by a progressive loss of bone mass, for example rheumatoid arthritis, hyperparathyroidism or bone tumour metastases

##STR00001##

The present invention relates to aromatic isothiocyanates of formula U ##STR00001##
as defined in claim 1, to liquid-crystalline media comprising one or more compounds of formula U and to high-frequency components comprising these media, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, tunable filters, tunable metamaterial structures, and electronic beam steering antennas, e.g. phased array antennas.

The present invention relates to aromatic isothiocyanates of formula U ##STR00001##
as defined in claim 1, to liquid-crystalline media comprising one or more compounds of formula U and to high-frequency components comprising these media, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, tunable filters, tunable metamaterial structures, and electronic beam steering antennas, e.g. phased array antennas.

A compound having large refractive index anisotropy (Δn), the effect of increasing the phase transition temperature of a liquid crystal phase, and high solubility, and showing large dielectric anisotropy (Δε) in a high frequency region, a composition containing the compound, a liquid crystal composition, and a device using the liquid crystal composition. The compound has large refractive index anisotropy Δn, sufficiently high T.sub.n-i, and high compatibility with a liquid crystal composition, and shows large dielectric anisotropy in a high frequency region, and is thus useful for a material of an element of a device such as a high-frequency phase shifter, a phased array antenna, an image recognition device, a distance measuring device, a liquid crystal display device, a liquid crystal lens, a birefringent lens for stereoscopic image display, or the like.

New chelators such as H.sub.3L1, H.sub.3L2, H.sub.3L3, H.sub.3L26 and derivatives were synthesized for the complexation of {Al.sup.18F}.sup.2+. These new chelators are able to complex {AI.sup.18F}.sup.2+ with good radiochemical yields using a labeling temperature of 37° C. The stability of the new Al.sup.18F-complexes was tested in phosphate buffered saline (PBS) at pH 7 and in rat serum. AI.sup.18F-L3 and AI.sup.18F-L26 showed a stability comparable to that of the previously reported Al.sup.18F-NODA. Moreover, the biodistribution of Al.sup.18F-L3 and AI.sup.18F-L26 showed absence of in vivo demetallation since only very limited bone uptake was observed, whereas the major fraction of activity 60 min p.i. was observed in liver and intestine due to hepatobiliary clearance of the radiolabeled ligand. The chelators H.sub.3L3 and Al.sup.18F-L26 demonstrated to be a good lead candidates for the labeling of heat sensitive biomolecules with .sup.18F-fluorine and derivatives have been synthesized. We have explored the complexation of {AI.sup.18F}.sup.2+ with new chelators and obtained very favourable radiochemical yields (>85%) using a labeling temperature of 37° C. The stability of the new Al.sup.18F-complexes was tested in phosphate buffered saline (PBS) at pH 7 and in rat serum at 37° C., where AI.sup.18F-L3 and AI.sup.18F-L26 showed a stability comparable to that of the previously reported Al.sup.18F-NODA. Moreover, the biodistribution of Al.sup.18F-L3 and Al.sup.18F-L26 showed high stability, since only very limited bone uptake—which would be an indication of release of fluorine-18 in the form of fluoride—was observed, whereas the major fraction of activity 60 min p.i. was observed in liver and intestines due to hepatobiliary clearance of the radiolabeled ligand. The chelators H.sub.3L3 and H.sub.3L26 demonstrated to be good lead candidates for the labeling of heat sensitive biomolecules with .sup.18F-fluorine and several derivatives have been synthesized.

New chelators such as H.sub.3L1, H.sub.3L2, H.sub.3L3, H.sub.3L26 and derivatives were synthesized for the complexation of {Al.sup.18F}.sup.2+. These new chelators are able to complex {AI.sup.18F}.sup.2+ with good radiochemical yields using a labeling temperature of 37° C. The stability of the new Al.sup.18F-complexes was tested in phosphate buffered saline (PBS) at pH 7 and in rat serum. AI.sup.18F-L3 and AI.sup.18F-L26 showed a stability comparable to that of the previously reported Al.sup.18F-NODA. Moreover, the biodistribution of Al.sup.18F-L3 and AI.sup.18F-L26 showed absence of in vivo demetallation since only very limited bone uptake was observed, whereas the major fraction of activity 60 min p.i. was observed in liver and intestine due to hepatobiliary clearance of the radiolabeled ligand. The chelators H.sub.3L3 and Al.sup.18F-L26 demonstrated to be a good lead candidates for the labeling of heat sensitive biomolecules with .sup.18F-fluorine and derivatives have been synthesized. We have explored the complexation of {AI.sup.18F}.sup.2+ with new chelators and obtained very favourable radiochemical yields (>85%) using a labeling temperature of 37° C. The stability of the new Al.sup.18F-complexes was tested in phosphate buffered saline (PBS) at pH 7 and in rat serum at 37° C., where AI.sup.18F-L3 and AI.sup.18F-L26 showed a stability comparable to that of the previously reported Al.sup.18F-NODA. Moreover, the biodistribution of Al.sup.18F-L3 and Al.sup.18F-L26 showed high stability, since only very limited bone uptake—which would be an indication of release of fluorine-18 in the form of fluoride—was observed, whereas the major fraction of activity 60 min p.i. was observed in liver and intestines due to hepatobiliary clearance of the radiolabeled ligand. The chelators H.sub.3L3 and H.sub.3L26 demonstrated to be good lead candidates for the labeling of heat sensitive biomolecules with .sup.18F-fluorine and several derivatives have been synthesized.