摘要:
Substituted benzopyrano[3,4-c]pyridines having the following structural formula are disclosed: ##STR1## In the above formula, R.sub.1 R.sub.2 are hydrogen, a hydroxyl group or a lower alkoxyl group of from 1 to 6 carbon atoms; R.sub.3 is hydrogen or a lower alkyl group of from 1 to 6 carbon atoms and X is an oxygen atom, a sulfur atom, a methylene group or a nitrogen atom substituted by hydrogen, a lower alkyl group of from 1 to 6 carbon atoms or a lower alkanoyl group of from 1 to 6 carbon atoms. The compounds of this invention are prepared by reacting an R.sub.1, R.sub.2 -substituted phenol with a 3-carbethoxy-4-piperidone in the presence of an acid catalyst to give an intermediate R.sub.1, R.sub.2 -substituted benzopyrano[3,4-c] pyridine. N-aminoalkylbenzopyrano[3,4-c]pyridines are obtained by treating the benzopyrano[3,4-c]pyridine with an appropriately substituted alkyl halide. The compounds of this invention are useful as bronchodilators for the treatment of bronchial asthma.
摘要:
Substituted benzopyrano[3,4-c]pyridines having the following structural formula are disclosed: ##SPC1##In the above formula, R.sub.1 and R.sub.2 are hydrogen, a hydroxyl group or a lower alkoxyl group of from 1 to 6 carbon atoms; and X is an oxygen atom, a sulfur atom, a methylene group or a nitrogen atom substituted by hydrogen, a lower alkyl group of from 1 to 6 carbon atoms or a lower alkanoyl group of from 1 to 6 carbon atoms. The compounds of this invention are prepared by reacting an R.sub.1, R.sub.2 -substituted phenol with a 3-carbethoxy-4-piperidone in the presence of an acid catalyst to give an intermediate R.sub.1, R.sub.2 -substituted benzopyrano[3,4-c]pyridine. N-aminoalkylbenzopyrano[3,4-c]pyridines are obtained by treating the benzopyrano[3,4-c]pyridine with an appropriately substituted alkyl halide. The compounds of this invention are useful as bronchodilators for the treatment of bronchial asthma.
摘要:
Substituted benzopyrano[3,4-c]pyridines having the following structural formula are disclosed: ##SPC1##In the above formula, R.sub.1 and R.sub.2 are hydrogen, a hydroxyl group or a lower alkoxyl group of from 1 to 6 carbon atoms; R.sub.3 is hydrogen or a lower alkyl group of from 1 to 6 carbon atoms and X is an oxygen atom, a sulfur atom, a methylene group or a nitrogen atom substituted by hydrogen, a lower alkyl group of from 1 to 6 carbon atoms or a lower alkanoyl group of from 1 to 6 carbon atoms. The compounds of this invention are prepared by reacting an R.sub.1, R.sub.2 -substituted phenol with a 3-carbethoxy-4-piperidone in the presence of an acid catalyst to give an intermediate R.sub.1, R.sub.2 -substituted benzopyrano[3,4-c]pyridine. N-aminoalkylbenzopyrano[3,4-c]pyridines are obtained by treating the benzopyrano[3,4-c]pyridine with an appropriately substituted alkyl halide. The compounds of this invention are useful as bronchodilators for the treatment of bronchial asthma.
摘要:
This invention relates to substituted 2-amino chromones of the general structure I: ##SPC1##wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 may be hydrogen, hydroxy, lower alkyl or lower alkoxy of 1-6 carbon atoms, halogen such as chloro or bromo, or aryl such as phenyl, and X may be cyano or carboxamido. Two novel procedures for preparing substituted 2-amino chromones having the Formula I, starting with salicylic acid or substituted salicylic acid, are described. The compounds of this invention are active in the prevention of allergic and asthmatic reactions in mammals.
摘要:
Methodologies adjust a component failure rate for electric power network reliability analysis. A component may include subcomponents and the failure of each subcomponent may be feature dependent. Features are measurable or observable inputs, which can affect the life of one or more subcomponents. The failure rate of a particular component may be obtained according to its real conditions. The methodologies can be used to do condition-based reliability analysis for electric power networks, in order to obtain a maintenance/replacement/operation strategy.
摘要:
New quinoline compound, and the corresponding 1,2-; 1,3-; and 1,4-benzodiazines, the quinoline compounds being of the formula: ##STR1## and salts thereof, wherein R.sub.1 and R.sub.2 are independently hydrogen, lower alkyl, halo, trifluoromethyl, amino, lower alkyl amino, lower acylamino, cyano, aryl, aryl/lower alkylene, nitro, lower alkynyl, lower alkenyl, lower alkyl sulfinyl, lower alkyl sulfonyl, lower alkoxycarbonyl, carboxyl, lower alkoxy, lower alkanoyl, or lower alkenoyl,Y is oxygen, sulfur, nitrogen or R.sub.3 N wherein R.sub.3 is hydrogen, lower alkyl, alkenyl, alkynyl, aryl, aralkyl, acyl, aminoalkyl, or carboxyalkyl,Z is oxygen, sulfur or nitrogen,X is cyano, carbalkoxyl, carboxyl, formyloximino, tetrazolyl, carbalkoxyalkyl or carboxyalkyl, andm is 0 or 1, are useful as medicinals, especially for treatment of asthma, and/or as intermediates in the preparation of compounds useful for treating asthma.
摘要:
Provided are imidazoquinoxalines of the structures: ##STR1## wherein R.sub.1, R.sub.5, R.sub.6 and R.sub.7 are independently H, alkyl, aryl, alkenyl, alkynyl, hydroxy, hydroxyalkyl, alkoxy, mercapto, mercaptoalkyl, alkylthio, amino, alkylamino, aminoalkyl, carboxaldehyde, carboxylic acid and salts thereof, carbalkoxy, alkanoyl, cyano, nitro, halo, trifluoromethyl, alkylsulfonyl, sulfonamido, or R.sub.1, R.sub.5, R.sub.6 and R.sub.7 may be taken together with the adjacent group to form a methylenedioxy group.R.sub.4 is H, alkyl, alkenyl, alkynyl, aryl, aralkyl, hydroxy or alkanoyl.R.sub.3 is H, cyano, tetrazolo, carboxaldehyde, hydroxyalkyl, carboxylic acid and salts thereof or derivatives thereof such as esters or amides in which the substituent on the ester oxygen or amide nitrogen is alkyl, aryl, hydroxyalkyl, alkoxyalkyl or amino alkyl.R.sub.2 and R.sub.8 are independently H, alkyl, aryl, halo, amino, alkylamino, arylamino, hydroxyamino, hydroxy, alkoxy, mercapto or alkylthio, andX is oxygen, sulfur, imino, and hydroxyimino.
摘要翻译:提供以下结构的咪唑并喹啉:其中R1,R5,R6和R7独立地为H,烷基,芳基,烯基,炔基,羟基,羟基烷基,烷氧基,巯基,巯基烷基,烷硫基,氨基, 烷基氨基,氨基烷基,甲醛,羧酸及其盐,烷氧基,烷酰基,氰基,硝基,卤素,三氟甲基,烷基磺酰基,亚磺酰氨基或R 1,R 5,R 6和R 7可与相邻基团一起形成亚甲二氧基。 R4是H,烷基,烯基,炔基,芳基,芳烷基,羟基或烷酰基。 R 3是H,氰基,四唑,羧醛,羟烷基,羧酸及其盐或其衍生物,例如酯或酰胺,其中酯氧或酰胺氮的取代基是烷基,芳基,羟基烷基,烷氧基烷基或氨基烷基。 R 2和R 8独立地是H,烷基,芳基,卤素,氨基,烷基氨基,芳基氨基,羟基氨基,羟基,烷氧基,巯基或烷硫基,X是氧,硫,亚氨基和羟基亚氨基。
摘要:
This invention relates to novel indolothiopyrones having the formula: ##STR1## wherein R.sub.1 is hydrogen, lower alkyl or aryl; R.sub.2 is hydrogen or halogen; and R.sub.7 is hydrogen, lower alkyl, lower alkenyl, lower alkynyl, nitro-substituted-aryl, or .omega.-substituted lower alkyl wherein the substituent is: ##STR2## wherein R.sub.4 and R.sub.5 each represent hydrogen, lower alkyl, or together with the nitrogen atom, form a heterocyclic ring; and R.sub.6 is lower alkoxy or amino, and novel intermediates used in their preparation. The indolothiopyrones are prepared by reacting a 3-mercaptoindole with sodium propiolate or a substituted sodium propiolate followed by acidification to obtain an intermediate acid; the intermediate acid cyclizes in the presence of an acid catalyst to obtain the indolothiopyrone structure which may be additionally subjected to halogenation, alkylation or hydrolysis to obtain derivatives having the various substituent groups disclosed. The compounds of this invention are useful in the treatment of angina pectoris and conditions benefiting from the depression of the central nervous system.