摘要:
The present invention relates to novel 1-azaxanthone-3-carboxylic acid and its derivatives usable for effective medicines for the treatment of allergic diseases, which are shown by the following formula (I) ##STR1## wherein R.sub.1 is hydrogen, alkyl, phenyl, carboxyl, hydroxyl, alkoxy or amino group which may be unsubstituted or substituted by one alkyl, m is 0, 1 or 2 and R.sub.2 is alkyl, alkoxy, halogen, nitro, hydroxy, carboxyl, butadienylene (--CH.dbd.CH--CH.dbd.CH--) which forms a benzene ring with any adjacent carbon atoms or amino group which may be unsubstituted or substituted by at least one alkyl, and their physiologically acceptable salts.
摘要:
The present invention relates to novel 1-azaxanthone-3-carboxylic acid and its derivatives usable for effective medicines for the treatment of allergic diseases, which are shown by the following formula (I) ##STR1## wherein R.sub.1 is hydrogen, alkyl, phenyl, carboxyl, hydroxyl, alkoxy or amino group which may be unsubstituted or substituted by one alkyl, m is 0, 1 or 2 and R.sub.2 is alkyl, alkoxy, halogen, nitro, hydroxy, carboxyl, butadienylene (--CH.dbd.CH--CH.dbd.CH--) which forms a benzene ring with any adjacent carbon atoms or amino group which may be unsubstituted or substituted by at least one alkyl, and their physiologically acceptable salts.
摘要:
The present invention relates to novel 1-azaxanthone derivatives, which are shown by the following formula: ##STR1## wherein m is 1 or 2R'.sub.1 is hydrogen, C.sub.1-6 alkyl, phenyl, C.sub.1-6 alkoxycarbonyl, hydroxy, C.sub.1-4 alkoxy, amino or C.sub.1-3 alkylamino;each of R.sub.2 is independently C.sub.1-6 alkyl, C.sub.1-4 alkoxy, halogen, nitro, hydroxy, carboxy, amino, C.sub.1-3 alkylamino or di(C.sub.1-3 alkyl) amino; orwhen m is 2, the two R.sub.2 groups may be independently as defined above or may form together with adjacent rings carbon atoms the butadienylene group;R.sub.3 is cyano, C.sub.1-6 alkoxycarbonyl, carboxamide, N-C.sub.1-3 alkylcarboxamide or N,N-di(C.sub.1-3 alkyl) carboxamide.The novel derivatives are useful as intermediates for 1-azaxanthone-3-carboxylic acid derivatives having effective antiallergic and bronchodilating activities.
摘要:
A compound of the formula ##STR1## wherein R.sub.1 is a C.sub.1-4 alkoxy, R.sub.2 is C.sub.1-4 alkyl and R.sub.3 is C.sub.1-4 alkylthio or pharmaceutically acceptable salts thereof. The compounds of the present invention exhibit excellent choleretic activity.
摘要:
The present invention relates to a compound of the formula: ##SPC1##Wherein R.sub.1 is an alkyl group of 1 to 4 carbons, an alkoxy group of 1 to 4 carbons or hydroxyl, and R.sub.2 and R.sub.3 are either the same or different and may be an alkyl group of 1 to 4 carbons, an alkoxy group of 1 to 4 carbons, hydroxyl, halogen or an alkylthio group of 1 to 4 carbons, or they are, connecting with each other, an alkylenedioxy group of 1 to 3 carbons, with the proviso that when R.sub.1 is an alkoxy group, at least one of R.sub.2 and R.sub.3 is an alkoxy group or an alkylthio group, or R.sub.2 and R.sub.3 are, connecting with each other, an alkylenedioxy group; when R.sub.1 is an alkyl group or hydroxyl, R.sub.2 and R.sub.3 are the same or different and may be an alkoxy group, an alkylthio group or, connecting with each other, an alkylene dioxy group; when R.sub.2 and R.sub.3 are methoxy, R.sub.1 is an alkyl group of 2 or 3 carbons, an alkoxy group of 2 to 4 carbons or hydroxyl, and when R.sub.2 is methyl and R.sub.3 is methoxy, R.sub.1 is an alkoxy group of 2 to 4 carbons or its pharmaceutically acceptable salts. The present invention also provides for a method of preparing the aforementioned compounds. The present compounds are characterized by exhibiting strong spasmolytic or relaxing action on the gall bladder, the common biliary duct, as well as exhibiting strong choleric activity and low toxicity.
摘要:
This invention relates to a 3-(trisubstituted benzoyl)-propionic acid and the production thereof.This compound has spasmolytic and choleretic activity.
摘要:
Novel 1-azaxanthone-3-carboxylic acid derivatives, which are shown by the following formula (I) ##STR1## wherein R is hydrogen, alkyl, alkoxy or halogen; R.sub.1 and R.sub.2 are the same or different and each is hydrogen, alkyl or alkenyl; and m is 1 or 2; and their physiologically acceptable salts, are usable as effective medicines for preventing and/or treating allergic diseases. The compound of the formula (I) can be produced by reacting a compound of the formula: ##STR2## wherein R and m have the same meaning as defined above; R.sub.3 is carboxyl or group which is convertible into carboxyl through hydrolysis; X is alkyl phosphate radical or halogen, with a compound of the formula: ##STR3## wherein R.sub.1 and R.sub.2 have the same meaning as defined above, or its salt, and conducting hydrolysis, if necessary.
摘要:
Novel 3-(tetrazol-5-yl)-1-azaxanthone and its derivatives, which are shown by the following formula ##STR1## wherein R.sub.1 is hydrogen, amino or hydroxyl; R.sub.2 is alkyl, alkoxy, halogen, nitro, carboxyl, hydroxyl, butadienylene (--CH.dbd.CH--CH.dbd.CH--) which forms a benzene ring with any adjacent carbon atoms or amino group which may be unsubstituted or substituted by at least one alkyl; and m is 0, 1 or 2; and their physiologically acceptable salts, are usable as effective medicines for preventing and/or treating allergic diseases.
摘要:
A noise signal prediction system includes a signal detector for receiving a mixed signal having a voice signal and a background noise signal and for detecting the presence and absence of the voice signal contained in the mixed signal. A noise level detector is provided for detecting an actual noise level at each sampling cycle during the absence of the voice signal. A storing circuit stores the noise levels for a predetermined number of past sampling cycles. A predicting circuit predicts a noise level of a next sampling cycle based on the stored noise levels in the storing circuit. The storing circuit receiving and stores the actual noise levels during the absence of the voice signal, but stores the predicted noise levels during the presence of the voice signal.
摘要:
A noise suppression apparatus comprising a tuner 1 which selectively receiving a radio wave signal to be received and transforming it into an electric signal, a field information detector 2 which detects electric field information of the radio wave signal received by the tuner 1, a noise data generator 6 which generates a noise pattern on the basis of the electric field information .detected by the field information detector 2, a noise canceler 4 which removes an noise component from the signal outputted from the tuner 1 on the basis of the noise pattern generated by the noise data generator 6, and an amplifier 7 which outputs a noiseless signal outputted from the noise canceler 4.