SU715025A3 - Method of preparing indolysine derivatives or their salts - Google Patents
Method of preparing indolysine derivatives or their salts Download PDFInfo
- Publication number
- SU715025A3 SU715025A3 SU772530249A SU2530249A SU715025A3 SU 715025 A3 SU715025 A3 SU 715025A3 SU 772530249 A SU772530249 A SU 772530249A SU 2530249 A SU2530249 A SU 2530249A SU 715025 A3 SU715025 A3 SU 715025A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- benzoyl
- propoxy
- phenyl
- general formula
- indolysine
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
- C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
- C07D471/04—Ortho-condensed systems
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/06—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
- C07D213/16—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom containing only one pyridine ring
- C07D213/20—Quaternary compounds thereof
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Description
где Rj и R имеют указанные вьпле эначени , в среде апротонного растворител с последутошей обработкой получанного соединени проиэводньгм алкиламина обшей формулыwhere Rj and R have the above meanings, in the medium of an aprotic solvent followed by treatment of the obtained compound with alkylamine of general formula
Z - (CHj)- Am,Z - (CHj) - Am,
где Z -галоид или п-толуолсульфонилоксигруппа , п и Am имеют-вышеуказанные значени .where Z is a halogen or p-toluenesulfonyloxy group, p and Am are as defined above.
Целевой продукт вьщел ют s свободном виде или перевод т в соль известными приемами.The desired product is given in free form or converted into salt using known techniques.
Полученные целевые соединени обладают высокой биологической активнойтью .The obtained target compounds have a high biological activity.
Пример 1; Хлоргидрат 2-н-пр (3-ди-н-бутиламинопропокси )-бензоил -индолизина, В 250-мл колбе в течение 30 мин -перемешивают суспензию 10 г (0,036 ;моль) 2-н-пропил-З- {4-оксибензоил 1 индолизина и 9,9 г (0,072 моль) углекислого кали в 60 мл ацетона, добавл ют 8,8 г (0,040 моль) 1-хлор-3-ди-н-бутиламинопропана и кип т т с обратным холодильником в течение 20 ч. После охлаждени отфильтровы ,вают органические соли и растворитель выпаривают. Избыток галоидамина отгон ют в вакууме (0,2 мм).Example 1; 2-n-Pr hydrochloride (3-di-n-butylaminopropoxy) -benzoyl-indolizine, In a 250-ml flask for 30 minutes, mix a suspension of 10 g (0.036; mol) 2-n-propyl-3- {4- hydroxybenzoyl 1 indolizina and 9.9 g (0.072 mol) of potassium carbonate in 60 ml of acetone, 8.8 g (0.040 mol) of 1-chloro-3-di-n-butylaminopropane are added and refluxed for 20 After cooling, the organic salts are filtered off, the organic salts are added and the solvent is evaporated. Excess haloamine is distilled off in vacuo (0.2 mm).
Полученное основание хроматографируют на колонке, раствор ют в зфире ,. добавл ют эфирный раствор сол ной кислоты и получают хлорангидрид,The base obtained is chromatographed on a column, dissolved in zfira,. ethereal hydrochloric acid solution is added to give the acid chloride,
После перекристаллизации из смеси этилаиетат-э(Ьио выход 1,51 г (б8%) ,т;пл. 78-80°С.After recrystallization from a mixture of ethyl acetate (e = 1.51 g (δ8%), t; mp 78-80 ° C.
Аналогично получают хлоргидрат 2- -этил-3- |4- (3-ди-н-бутила.минопропокси )-бензоил -индолизина, т, пл. , и кислый оксалат 2-и-бутил (3-ди-н-бутиламинопропокси) бензоил - индолизина, т. пл. 81-83° ( бензоил-дихлорэтан),In a similar manner, 2- -ethyl-3- | 4- (3-di-n-butyl.minopropoxy) -benzoyl-indolizine hydrochloride is obtained, m, pl. , and acid oxalate 2-and-butyl (3-di-n-butylaminopropoxy) benzoyl - indolizina, so pl. 81-83 ° (benzoyl dichloroethane),
Соединени Compounds
Пример 2, Кислый оксалат 2-(4-хлорфенил)(З-ди-н-бутил-аминопропокси )-бензоил -индолизинаExample 2, Acid oxalate 2- (4-chlorophenyl) (Z-di-n-butyl-aminopropoxy) benzoyl-indolizine
В течение 30 мин перемешивают суспензию 4,1 г (0,012 моль) 2-(4-хлорфенил ) -3-(4-оксибензоил)-индолизина и 3,3 г (0,024 моль) углекислого кали в 30 мл метилэтилкетона добавл ют 3,9 г (0,018 моль) 1-хлор-З-ди-н-бутиламинопропана , кип т т 12 ч с обратным холодильником, охлаждают , отфильтровьшают органические соли и промывают ацетоном. Растворитель выпаривают, остаток хроматогрфируют , разбавл ют безводным эфиром добавл ют эф.ирный раствор щавелевой кислоты и осадок перекристаллизовывают из изопропанола.A suspension of 4.1 g (0.012 mol) of 2- (4-chlorophenyl) -3- (4-hydroxybenzoyl) -indolizin and 3.3 g (0.024 mol) of potassium carbonate in 30 ml of methyl ethyl ketone is added for 30 minutes; 9 g (0.018 mol) of 1-chloro-3-di-n-butylaminopropane, boil for 12 hours under reflux, cool, filter the organic salts and wash with acetone. The solvent is evaporated, the residue is chromatographed, the ethyl oxalic acid solution is diluted with anhydrous ether, and the residue is recrystallized from isopropanol.
Выход 50,6%, т. пл. 144-145°С.The output of 50.6%, so pl. 144-145 ° C.
Пример 3. Хлоргидрат этил-2- (ди-н-пропиламино-2 зтокси)-4-бензоил -3-индолизина .Example 3. Ethyl-2- (di-n-propylamino-2-toxy) -4-benzoyl-3-indolysine hydrochloride.
В сосуде емкостью 250 мл перемешивают 30 мин суспензию 9 г (0,036 моль) этил-2-(гидрокси-4-бензоил)-3-индолизина и 9,9 г (0,072 моль) карбоната кали в 60 мл ацетона, прибавл ют 5,9 г (-0,040 моль) хлор-1-ди-н-пропиламин0-2-этана и нагревают с обратным холодильником в течение 20 ч. Охлаждают, отдел ют органические соли и выпаривают , избыток галогенамина отгон ют в вакууме (0,2 мм).In a vessel with a capacity of 250 ml, a suspension of 9 g (0.036 mol) of ethyl 2- (hydroxy-4-benzoyl) -3-indolysin and 9.9 g (0.072 mol) of potassium carbonate in 60 ml of acetone is stirred for 30 min; 5, 9 g (-0.040 mol) of chloro-1-di-n-propylamine-0-2-ethane and heated under reflux for 20 hours. Cool, separate the organic salts and evaporate, remove excess halogenamine in vacuum (0.2 mm ).
Полученное основание хроматограФируют на колонке, раствор ют вThe resulting base is chromatographed on a column, dissolved in
эфире, добавл ют эфирный раствор сол ной.кислоты и получают хлоргидрат . Выход 61%, т. пл. 158-161°С (ацетонитрил).ether, add ethereal hydrochloric acid solution and get hydrochloride. Yield 61%, so pl. 158-161 ° C (acetonitrile).
Подобным образом получают соединени , представленные в таблице.The compounds shown in the table are prepared in a similar manner.
ТаблицаTable
Температура плавлени СMelting point C
Хлоргидрат метил-2-(ди-н-пропиламино-3-пропокси- )-4-бензоил -3-индолизинаMethyl-2- (di-n-propylamino-3-propoxy-) -4-benzoyl-3-indolysine hydrochloride
Хлоргидрат н-пропил-2-(диметиламино-З-пропокси ) -4-беНзоил -3-индолизинаN-propyl-2- (dimethylamino-3-propoxy) -4-benzoyl-3-indolysine hydrochloride
Хлоргидрат н-бутил-2-(диэтиламино-3-пропокси )-4-бензоил -З-индолизинаN-butyl-2- (diethylamino-3-propoxy) -4-benzoyl -Z-indolysine hydrochloride
Хлоргидрат н-пропил-2-(морфолино-3-пропокси )-4-бензоил -3-индолизинаN-propyl-2- (morpholino-3-propoxy) -4-benzoyl-3-indolysine hydrochloride
Хлоргидрат метил-2-(диэтиламино-3-пропокси )-4-диметил-3 j 5-безоил -3-индолизинаMethyl-2- (diethylamino-3-propoxy) -4-dimethyl-3 j 5-bezoyl-3-indolysine hydrochloride
148 - 150 (ацетон-зтилацетат)148 - 150 (acetone-ethyl acetate)
152 - 154 (ацетон-этилаиетат)152 - 154 (acetone-ethyl acetate)
139 - 141 (ацетон-зтилацетат)139 - 141 (acetone-ethyl acetate)
158 .-- 160 (ацетон-этилацетат)158 .-- 160 (acetone-ethyl acetate)
186 - 188 (ацетон)186 - 188 (acetone)
Хлорги рат этил-2(диэтиламино-3-пропокси )-4-диметил-З, 5-бензоил 3-индолизинаHlorgi rat ethyl-2 (diethylamino-3-propoxy) -4-dimethyl-3, 5-benzoyl 3-indolizina
Хлоргидрат н-пропил-2-t(ди-н бутиламино-3-пропокси )4-диметил-3 ,5-бензоил -3-индолизинаN-propyl-2-t hydrochloride (di-n-butylamino-3-propoxy) 4-dimethyl-3, 5-benzoyl-3-indolizina
Кислый оксалат изопропил-.- ( (ди-н-бутиламино-3-пропокси)-4-бензоил -3-индолизина , моногидратAcid oxalate isopropyl. - ((di-n-butylamino-3-propoxy) -4-benzoyl-3-indolysin monohydrate
Кислый оксалат н-пентил-2-(ди-н бутиламино-3-пропокси )-4-бензоил -3-индолизинаAcid oxalate n-pentyl-2- (di-n-butylamino-3-propoxy) -4-benzoyl-3-indolysine
Кислый оксалат н-пентил-2-{(ди-н-пропиламино-3-пропокси )-4 -бензоил -3-индолизинаAcid oxalate n-pentyl-2 - {(di-n-propylamino-3-propoxy) -4-benzoyl-3-indolizine
Кислый оксалат н бутил-2-(ди-н-бутиламино-3-пропокси )-4-диметил-З , 5-бензоил -3--индолизина, моногидратAcid oxalate n butyl-2- (di-n-butylamino-3-propoxy) -4-dimethyl-3, 5-benzoyl-3 - indolizina, monohydrate
Полуторный оксалат этил-2-(ди-н-пропиламино-3-пропокси )-4-бензоил -3-индолизинаEthyl oxalate one-and-a-half oxalate-2- (di-n-propylamino-3-propoxy) -4-benzoyl-3-indolysine
Кислый оксалат этил-2-{(ди-н-бутиламино-3-пропокси )-4-бензои -3-индолизинаAcid ethyl oxalate-2 - {(di-n-butylamino-3-propoxy) -4-benzoi-3-indolysine
Кислый оксалат этил-2-I(ди-н-бутиламино-3-пропокси )-4-димети-3 ,5-бензоил -3-индилизикаAcid ethyl oxalate-2-I (di-n-butylamino-3-propoxy) -4-dimeti-3, 5-benzoyl-3-indylisic
Кислый оксалат этил-2-(ди-н-пропиламино-З-пропокси )-4-диметил-З ,5-бензоил -3-индолизинаAcid ethyl oxalate-2- (di-n-propylamino-3-propoxy) -4-dimethyl-3, 5-benzoyl-3-indolizine
Кислый оксалат фенил-2-(диэтиламино-3-пропокси )-4-бензоил -3-индолизинаAcid phenyl-2- (diethylamino-3-propoxy) -4-benzoyl-3-indolysine oxalate
Кислый оксалат фенил-2-I(ди-н -бутиЛамино-З-пропокси)-4-бензоил -3-индолизинаAcidic phenyl-2-I oxalate (di-n-butylamino-3-propoxy) -4-benzoyl-3-indolysine
Кислый аксалат фтор-4-фенил)-2- (диметиламино-3-пропокси)-4бензоил -3-индолизинаFluoro-4-phenyl) -2- (dimethylamino-3-propoxy) -4-benzoyl-3-indolysine acid axalate
Кислый оксалат {фтор-4-фенил)-2- (ди-н-бутиламино-3-пропокси)-4-бензоил -3-йндолизинаAcidic oxalate {fluoro-4-phenyl) -2- (di-n-butylamino-3-propoxy) -4-benzoyl-3-yndolizina
Кислый оксалат (хлор-4-фенил)-2 (диметиламино-3-пропокси)-4-бензоил -3-индолизинаAcid oxalate (chloro-4-phenyl) -2 (dimethylamino-3-propoxy) -4-benzoyl-3-indolysine
Кислый оксалат (хлор-4-фенил)-2- (ди-н-пропиламино-3-пропокси)-4-бензоил -3-индолизина Кислый оксалат (брсм-4-фенил) -2-(диэтиламино-3-пропокси)-4-бензоил -3-индолизинаAcid oxalate (chloro-4-phenyl) -2- (di-n-propylamino-3-propoxy) -4-benzoyl-3-indolizine Acid oxalate (brsm-4-phenyl) -2- (diethylamino-3-propoxy) -4-benzoyl -3-indolysine
Продолжение таблицыTable continuation
183 - 185 (изопропанол)183 - 185 (isopropanol)
154 - 156 (этилацетат)154 - 156 (ethyl acetate)
90 - 92 (бензол)90 - 92 (benzene)
92 - 93 (бензол)92 - 93 (benzene)
:97,5 - 99 (бензол): 97.5 - 99 (benzene)
90 - 92 (бензол)90 - 92 (benzene)
99,5-104,5 (дихлорэтан)99.5-104.5 (dichloroethane)
83 - 85 (дихлорэтан-бенз83 - 85 (dichloroethane-benz
180 (ацетонитрил)180 (acetonitrile)
134 - 135134 - 135
(бензол-дихлорэт(benzene-dichloroet
183183
(изопропанол)(isopropanol)
92 - 93,592 - 93.5
(бензол)(benzene)
175 (метанол)175 (methanol)
120 (изопропанол)120 (isopropanol)
186 (пропанол)186 (propanol)
129 - 130 (изопропанол)129 - 130 (isopropanol)
159 (метанол)159 (methanol)
Кислый .оксалат (бром-4-фенил)-2- (ди-н-бутиламино-3-пропокси)-4-бенэоил -3-индолизинаAcidic oxalate (bromo-4-phenyl) -2- (di-n-butylamino-3-propoxy) -4-benzoyl-3-indolizine
Кислый оксалат (метокси-4-фенил)-2- (диметиламино-3-пропокси)-4-бенэоил )-3-индолизинаAcid oxalate (methoxy-4-phenyl) -2- (dimethylamino-3-propoxy) -4-benzoyl) -3-indolizine
Кислый оксалат (метокси-4-фенил)-2- (диэтиламиио-3-)-4-бензоил -3-индолизинаAcid oxalate (methoxy-4-phenyl) -2- (diethylamio-3 -) - 4-benzoyl-3-indolysine
Кислый оксалат {бром-2-фенил)-2- (ди-н-пропиламино-3-пропокси)-4-бензоил -3-индолиэинаAcidic oxalate {bromo-2-phenyl) -2- (di-n-propylamino-3-propoxy) -4-benzoyl-3-indoliein
Кислый оксалат (бром-2-фенйл)-2-{ (ди-н-бутиламино-3-пропокси)-4-бензоил )-3-индолизинаAcid oxalate (bromo-2-fenil) -2- {(di-n-butylamino-3-propoxy) -4-benzoyl) -3-indolizine
Кислый оксалат (дихлор-3,4-фенил)-2- (ди-н-бутиламино-3-пропокси)-4-бензоил )-3-индолизинаAcid oxalate (dichloro-3,4-phenyl) -2- (di-n-butylamino-3-propoxy) -4-benzoyl) -3-indolizine
Кислый оксалат (дихлор-3,4-фенил)2-t (диэтиламино-3-пропокси)-4-бензоил -3-индолизинаAcid oxalate (dichloro-3,4-phenyl) 2-t (diethylamino-3-propoxy) -4-benzoyl-3-indolizina
Кислый оксалат (бром-3-фенил)-2- (диметиламино-3-пропокси)-4-бензоил -3-индолизинаAcid oxalate (bromo-3-phenyl) -2- (dimethylamino-3-propoxy) -4-benzoyl-3-indolizine
Кислый оксалат (бром-3-фенил)-2-Е (диэтиламино-3-пропокси)-4-бензоил -3-индолизинаAcid oxalate (bromo-3-phenyl) -2-E (diethylamino-3-propoxy) -4-benzoyl-3-indolizine
Кислый оксалат (хлор-З-метил-4-фенил )-2-(ди-н-пропиламино-3-пропокси )-4-бензоил -З-индолизинаAcid oxalate (chloro-3-methyl-4-phenyl) -2- (di-n-propylamino-3-propoxy) -4-benzoyl-3-indolizine
Кислый оксалат (хлор-З-метил-4-фенил )-2-(диэтиламино-3-пропокси )-4-5ензоил -3-индолизинаAcid oxalate (chloro-3-methyl-4-phenyl) -2- (diethylamino-3-propoxy) -4-5enzoyl-3-indolizine
Кислый оксалат (меткл-4-фенил)-2- (ди-н-пропиламино-3-пропокси-4-бенэоил -3-индолизинаAcid oxalate (Mekl-4-phenyl) -2- (di-n-propylamino-3-propoxy-4-benzoyl-3-indolizina
Кислый оксалат (метил-4-фенил)-2- (ди н-бутиламино-3-пропокси)-4-бензоил -3-индолизинаAcid oxalate (methyl-4-phenyl) -2- (di n-butylamino-3-propoxy) -4-benzoyl-3-indolysin
Продолжение таблицыTable continuation
139 (изопропанол)139 (isopropanol)
138 (метанол)138 (methanol)
158 (метанол)158 (methanol)
157 (изопропанол)157 (isopropanol)
100100
145 - 146 (изопропанол)145 - 146 (isopropanol)
187 - 188 (изопропанол)187 - 188 (isopropanol)
182 (изопропанол)182 (isopropanol)
167 - 168 зопропанол-метанол)167 - 168 zopropanol-methanol)
150 - 151 (изопропанол)150 - 151 (isopropanol)
171 - 172 (метанол)171 - 172 (methanol)
141 - 142 (изопропанол)141 - 142 (isopropanol)
148 - 149 (изопропанол)148 - 149 (isopropanol)
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB6680/76A GB1518443A (en) | 1976-02-19 | 1976-02-19 | Indolizine derivatives and process for preparing the same |
Publications (1)
Publication Number | Publication Date |
---|---|
SU715025A3 true SU715025A3 (en) | 1980-02-05 |
Family
ID=9818842
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU772452005A SU674674A3 (en) | 1976-02-19 | 1977-02-16 | Method of obtaining indolyzine derivatives or salts thereof |
SU772530249A SU715025A3 (en) | 1976-02-19 | 1977-10-12 | Method of preparing indolysine derivatives or their salts |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU772452005A SU674674A3 (en) | 1976-02-19 | 1977-02-16 | Method of obtaining indolyzine derivatives or salts thereof |
Country Status (7)
Country | Link |
---|---|
BE (1) | BE851463A (en) |
DD (1) | DD131558A5 (en) |
GB (1) | GB1518443A (en) |
HU (1) | HU180492B (en) |
PL (2) | PL113904B1 (en) |
SU (2) | SU674674A3 (en) |
ZA (1) | ZA771002B (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ193926A (en) * | 1979-07-06 | 1984-05-31 | Labaz Sanofi Nv | 2-(alkyl or phenyl)-3(4-hydroxybenzoyl)indolizines |
IL61385A (en) | 1979-12-06 | 1984-11-30 | Labaz Sanofi Nv | 3-(4-(dialkylaminoalkyl)-oxy-benzoyl)-indolizine derivatives,their preparation and pharmaceutical compositions containing them |
FR2495616A1 (en) * | 1980-12-09 | 1982-06-11 | Labaz Nv | Indolizine derivs. used to treat angina pectoris and cardiac arrhythmia - are 2-alkyl or phenyl 3-di:alkyl:amino-alkoxy-benzoyl -indolizine derivs. which have superior activity to butoprozine |
ATE409491T1 (en) * | 2000-01-18 | 2008-10-15 | Merck & Co Inc | ORHTHALMOLOGICAL COMPOSITIONS FOR THE TREATMENT OF OCULAR HYPERTENSION |
-
1976
- 1976-02-19 GB GB6680/76A patent/GB1518443A/en not_active Expired
-
1977
- 1977-02-16 SU SU772452005A patent/SU674674A3/en active
- 1977-02-16 BE BE174955A patent/BE851463A/en unknown
- 1977-02-17 DD DD7700197389A patent/DD131558A5/en not_active IP Right Cessation
- 1977-02-17 PL PL1977202797A patent/PL113904B1/en unknown
- 1977-02-17 PL PL1977196061A patent/PL102239B1/en unknown
- 1977-02-18 HU HU77LA907A patent/HU180492B/en not_active IP Right Cessation
- 1977-02-18 ZA ZA771002A patent/ZA771002B/en unknown
- 1977-10-12 SU SU772530249A patent/SU715025A3/en active
Also Published As
Publication number | Publication date |
---|---|
ZA771002B (en) | 1977-12-28 |
PL196061A1 (en) | 1978-04-24 |
PL113904B1 (en) | 1981-01-31 |
DD131558A5 (en) | 1978-07-05 |
GB1518443A (en) | 1978-07-19 |
SU674674A3 (en) | 1979-07-15 |
PL102239B1 (en) | 1979-03-31 |
HU180492B (en) | 1983-03-28 |
BE851463A (en) | 1977-08-16 |
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