Abstract: The present invention relates to a benzazepinone compound represented by the following formula (I): wherein R1 represents a C1-C6 alkyl group or halogeno C1-C6 alkyl group, R2 represents a carboxyl group which may be protected, and Y represents a group represented by the formula (II): wherein Z represents CH or a nitrogen atom, or a pharmaceutically acceptable salt thereof.

Abstract: An object of the present invention is to provide an industrially suitable process for preparing an imidazolidin-2,4-dione compound which is safe, simple and easy to prepare the imidazolidin-2,4-dione compound with high yield, which is a useful compound, for example, as a material for decomposing a harmful halogenated aromatic hydrocarbon compound such as dioxin, etc., an electroless silver plating solution for electronic parts, or a diazo copying material, etc. This object can be solved by a process for preparing an imidazolidin-2,4-dione compound which comprises subjecting a 4,5-dihydroxy-2-imidazolidinone compound, (1) to dehydration reaction in the presence of an acid catalyst(s); or (2) to reaction at 100 to 300° C. Or, it can be solved by a process for preparing an imidazolidin-2,4-dione compound which comprises reacting a mixed solution of a urea compound, glyoxal, and a base at 20 to 300° C.

Abstract: The present invention relates to a benzazepinone compound represented by the following formula (I): wherein R1 represents a C1-C6 alkyl group or halogeno C1-C6 alkyl group, R2 represents a carboxyl group which may be protected, and Y represents a group represented by the formula (II): wherein Z represents CH or a nitrogen atom, or a pharmaceutically acceptable salt thereof.

Abstract: An object of the present invention is to provide an industrially suitable process for preparing an imidazolidin-2,4-dione compound which is safe, simple and easy to prepare the imidazolidin-2,4-dione compound with high yield, which is a useful compound, for example, as a material for decomposing a harmful halogenated aromatic hydrocarbon compound such as dioxin, etc., an electroless silver plating solution for electronic parts, or a diazo copying material, etc. This object can be solved by a process for preparing an imidazolidin-2,4-dione compound which comprises subjecting a 4,5-dihydroxy-2-imidazolidinone compound, (1) to dehydration reaction in the presence of an acid catalyst(s); or (2) to reaction at 100 to 300° C. Or, it can be solved by a process for preparing an imidazolidin-2,4-dione compound which comprises reacting a mixed solution of a urea compound, glyoxal, and a base at 20 to 300° C.

Abstract: When a wireless channel fails, a working signal and a protection signal are synchronized and switching is performed without instantaneous disconnection. Each working unit of a plurality of working units is provided with a wireless-channel failure detector for detecting a failure that has occurred in a working wireless channel; a synchronization detecting circuit for detecting synchronization between a working wireless channel and a protection wireless channel; a changeover switch for selecting a signal from either the protection wireless channel or a working wireless channel without instantaneous disconnection; and a unit failure detector for detecting a failure that requires switching of a unit. When a failure develops in a wireless channel and a working wireless channel and the protection wireless channel are synchronized, a radio protection switching device controls the changeover switch to switch between working and protection wireless channels without instantaneous disconnection.

Abstract: An SDH/PDH monitoring and integrating apparatus collects control data generated in a monitoring unit employed in each PDH radio apparatus in a PDH communication network, transforms the control data into a control command that can be processed in an SDH communication network and transmits the control command to the SDH communication network. The control command transmitted to the SDH communication network arrives at an operation system by way of components such as a DCC (Digital Communication Channel), a monitoring unit employed in an SDH radio apparatus or employed in an SDH transmission apparatus and an X.25 network. The operation system extracts control data generated in the PDH communication network from the control command, executing the same processing as that of the conventional PDH monitoring panel for the extracted control data.