DE1097998B - Process for the production of new 1, 2, 4-oxadiazoles - Google Patents

Process for the production of new 1, 2, 4-oxadiazoles

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Publication number
DE1097998B
DE1097998B DEA32952A DEA0032952A DE1097998B DE 1097998 B DE1097998 B DE 1097998B DE A32952 A DEA32952 A DE A32952A DE A0032952 A DEA0032952 A DE A0032952A DE 1097998 B DE1097998 B DE 1097998B
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Germany
Prior art keywords
ions
found
cln
calculated
oxadiazoles
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DEA32952A
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German (de)
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Angelini Acraf SpA
Original Assignee
Aziende Chimiche Riunite Angelini Francesco ACRAF SpA
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Priority claimed from AT703759A external-priority patent/AT212830B/en
Application filed by Aziende Chimiche Riunite Angelini Francesco ACRAF SpA filed Critical Aziende Chimiche Riunite Angelini Francesco ACRAF SpA
Priority to DEA32952A priority Critical patent/DE1097998B/en
Publication of DE1097998B publication Critical patent/DE1097998B/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D271/00Heterocyclic compounds containing five-membered rings having two nitrogen atoms and one oxygen atom as the only ring hetero atoms
    • C07D271/02Heterocyclic compounds containing five-membered rings having two nitrogen atoms and one oxygen atom as the only ring hetero atoms not condensed with other rings
    • C07D271/061,2,4-Oxadiazoles; Hydrogenated 1,2,4-oxadiazoles

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Description

DEUTSCHESGERMAN

Es wurde gefunden, daß man zu einer Gruppe neuer und therapeutisch wertvoller 1,2,4-Oxadiazole der allgemeinen FormelIt has been found that a group of new and therapeutically valuable 1,2,4-oxadiazoles of the general formula

Verfahren zur Herstellung
neuer 1,2,4-Oxadiazole
Method of manufacture
new 1,2,4-oxadiazoles

R-CfR-Cf

,N—O, N-O

^N=C- (C H2)M—N(A)2 ^ N = C- (CH 2 ) M -N (A) 2

(I)(I)

gelangt, in der R ein gegebenenfalls substituierter Arylrest, η gleich 1, 2 oder 3 ist und in welcher (A)2 gleiche oder verschiedene Alkylreste darstellt, die beide gemeinsam einen gegebenenfalls durch weitere Heteroatome unterbrochenen Ring bilden können, wenn man Amidoximderivate der allgemeinen Formelarrives, in which R is an optionally substituted aryl radical, η is 1, 2 or 3 and in which (A) 2 represents identical or different alkyl radicals, both of which can together form a ring optionally interrupted by further heteroatoms, if amidoxime derivatives of the general formula

Anmelder:
Fa. Angelini Francesco, Rom
Applicant:
Angelini Francesco, Rome

Vertreter: Dr. G. W. LotterhosRepresentative: Dr. G. W. Lotterhos

und Dr.-Ing. H. W. Lotterhos, Patentanwälte,and Dr.-Ing. H. W. Lotterhos, patent attorneys,

Frankfurt/M., Lichtensteinstr. 3Frankfurt / M., Lichtensteinstr. 3

. N O C O (C H2) „ — Halogen. NOCO (CH 2 ) "- halogen

"NH,"NH,

(Π)(Π)

in der R und η die obige Bedeutung haben, mit sekundären Aminen der Formel HN(A)2 umsetzt und die Oxadiazole isoliert.in which R and η have the above meaning, reacts with secondary amines of the formula HN (A) 2 and isolates the oxadiazoles.

Geeignete Amidoxime sind z. B. solche, in denen R ein Phenylrest, ein p-Chlorphenylrest oder ein Naphthylrest ist und in denen A2 die — (CH3)2- oder — (C2H5)2-Gruppe darstellt oder auch gemeinsam mit dem Stickstoffatom, z.B.Suitable amidoximes are, for. B. those in which R is a phenyl radical, a p-chlorophenyl radical or a naphthyl radical and in which A 2 represents the - (CH 3 ) 2 or - (C 2 H 5 ) 2 group or together with the nitrogen atom, e.g.

,CH9 — CH,, CH 9 - CH,

— N- N

werden am besten in der Weise hergestellt, daß man das Amidoximare best prepared in such a way that the amidoxime

.NOH.NOH

-CHo-CHo

CH2 — CH2 CH 2 - CH 2

— C H.- C H.

2\2 \

— N- N

CH2 — CH2 CH 2 - CH 2

,CH2 — CH2x , CH 2 - CH 2x

1NH, 1 NH,

N-CHS N-CH S

g ·— C H2
Die als Ausgangssubstanz dienenden Amidoximderivate in der Kälte in Gegenwart eines inerten Lösungsmittels mit einem 2 bis 4 C-Atome besitzenden co-Halogencarbonsäurehalogenid zur Reaktion bringt.
g · - CH 2
The amidoxime derivatives serving as the starting substance are reacted in the cold in the presence of an inert solvent with a co-halocarboxylic acid halide containing 2 to 4 carbon atoms.

Die nach dem Verfahren der Erfindung herstellbaren Verbindungen zeigen z. B. eine aspezifische antispasmodische Wirkung auf die glatte Muskulatur des Dünndarmes, wenn er in vitro mittels Acetylcholin, Histamin, Bariumchlorid und l,l-Dimethyl-4-phenyl-piperaziniumiodid gereizt wird. So zeigt z. B. das 3-Phenyl-5-diäthylarninoäthyl-l,2,4-oxadiazol, das S-p-Chlorphenyl-S-pyrroHdino-propyl-l,2,4-oxadiazol und das 3-p-Chlorphenyl-4-diäthylaminoäthyl-l,2,4-oxadiazol eine dem Papaverin überlegene Wirkung. Ferner sei die anästhetische Wirkung hervorgehoben. So zeigen z. B. das 3-p-Chlorphenyl-5-morpholino-propyl-l,2,4-oxadiazol sowie das 3-Phenyl-5-diäthylaminomethyl-l,2,4-oxadiazol auf die Hornhaut des Kaninchens bereits in einer Konzentration von 0,5 °/0 eine sehr gute anästhetische Wirkung. Bei Verwendung der zuletzt genannten Verbindungen in der angegebenen Konzentration wird der Hornhautreiz vollkommen aufgehoben. Es sei auch auf die bei kleinen Dosen beim Mäusetest auftretende sedative Wirkung hingewiesen.The compounds which can be prepared by the process of the invention show e.g. B. an asspecific antispasmodic effect on the smooth muscles of the small intestine when it is stimulated in vitro by means of acetylcholine, histamine, barium chloride and l, l-dimethyl-4-phenyl-piperazinium iodide. So shows z. B. 3-phenyl-5-diethylarninoethyl-l, 2,4-oxadiazole, Sp-chlorophenyl-S-pyrroHdino-propyl-l, 2,4-oxadiazole and 3-p-chlorophenyl-4-diethylaminoethyl-l , 2,4-oxadiazole has an effect superior to papaverine. The anesthetic effect should also be emphasized. So show z. B. 3-p-chlorophenyl-5-morpholino-propyl-l, 2,4-oxadiazole and 3-phenyl-5-diethylaminomethyl-l, 2,4-oxadiazole on the rabbit cornea in a concentration of 0 5 ° / 0 a very good anesthetic effect. When using the last-mentioned compounds in the specified concentration, the corneal irritation is completely eliminated. Attention should also be drawn to the sedative effect that occurs with small doses in the mouse test.

Ferner wurde festgestellt, daß insbesondere das 3-Phenyl-5-dimethylaminoäthyl-l,2,4-oxadiazol und das 3-Phenyl-5-diäthylamino-l,2,4-oxadiazol eine starke, den Hustenreiz hemmende Wirkung hat, die analog der des Codeins ist (2mg/kgintraperitonal). Das zuletzt genannteIt was also found that in particular 3-phenyl-5-dimethylaminoethyl-1,2,4-oxadiazole and the 3-phenyl-5-diethylamino-l, 2,4-oxadiazole has a strong, throat-inhibiting effect, which is analogous to that of the Codeine is (2mg / kg intraperitoneally). The latter

109 507/493109 507/493

1,2,4-Oxadiazol verhindert lijjai:'" den Husten der Katze, der durch elektrische Reizung hervorgerufen wurde. Führt man den Test nach L. 0. Randall und J. J. Selitto mit der Ratte durch (vgl. Arch. Int. Pharmacodin., 1957, 111, S. 4Q9), so zeigt sich z. B. das 3-Phenyl-5-diäthylaminoäthyl-l,2,4-oxädiazol ebenso ahalgetisch " wirksam wie das Codein. Insbesondere übt die genannte Verbindung eine der Acetylsalicylsäure vergleichbare, entzündungshemmende Wirkung aus,: die sich bei dem durch Injektion von Bierhefe hervorgerufenem Rattenödem unter Beweis stellen ließ.1,2,4-Oxadiazole prevents lijjai: '"the cough of the cat, which was caused by electrical irritation. If the test according to L. 0. Randall and JJ Selitto is carried out with the rat (cf. Arch. Int. Pharmacodin. , 1957, 111, p. 4Q9), 3-phenyl-5-diethylaminoethyl-1,2,4-oxadiazole, for example, is just as effective as codeine. In particular, the compound mentioned exerts an anti-inflammatory effect comparable to that of acetylsalicylic acid : which was demonstrated in the rat edema caused by the injection of brewer's yeast.

BeispieleExamples

1. Zu einer Lösung von 40 g Benzamidoxim in 450 cm3 wasserfreiem Äther gibt man tropfenweise und unter Rühren und äußerer Eiskühlung eine Lösung, die 18,7 g /S-Chlorpropionylchlorid in 50 cm3 wasserfreiem Äther enthält. Man erhält einen dicken Niederschlag, rührt noch= 1I2 Stunde bei Raumtemperatur und filtriert sodann. Der Niederschlag wird gründlich mit Wasser gewaschen, um das Chlorhydrat des Benzamidoxims zu entfernen, während das Chloropropionyl-benzamidoxim ungelöst bleibt. Es wird im Exsikkator über P2O5 getrocknet. Die Ausbeute an dem praktisch reinen Produkt, das bei 98 und 99°C schmilzt, beträgt 94% der Theorie. Eine Lösung von 9,2 g Diäthylamin in 50 cm3 wasserfreiem Benzol wird tropfenweise unter Rühren und Kühlen zu einer Suspension aus 13 g Chloropropionyl-benzamidoxim in 50 cm3 wasserfreiem Benzol gegeben. Man erwärmt noch etwa 2 Stunden, kühlt ab und wäscht zweimal mit 10 cm3 Wasser. Man trocknet den Niederschlag über CaCl2 und destilliert das Lösungsmittel ab. Das 3-Phenyl-5-/?-diäthylaminoäthyl-l,2,4-oxadiazol geht bei 0,4 mm bei 127° C über. Ausbeute 10,5 g.1. A solution containing 18.7 g / S-chloropropionyl chloride in 50 cm 3 of anhydrous ether is added dropwise to a solution of 40 g of benzamidoxime in 450 cm 3 of anhydrous ether, with stirring and external ice cooling. A thick precipitate is obtained, stirred for a further 1 l for 2 hours at room temperature and then filtered. The precipitate is washed thoroughly with water in order to remove the hydrochloride of the benzamidoxime, while the chloropropionylbenzamidoxime remains undissolved. It is dried over P 2 O 5 in a desiccator. The yield of the practically pure product, which melts at 98 ° and 99 ° C., is 94% of theory. A solution of 9.2 g of diethylamine in 50 cm 3 of anhydrous benzene is added dropwise with stirring and cooling to a suspension of 13 g of chloropropionylbenzamidoxime in 50 cm 3 of anhydrous benzene. The mixture is heated for about 2 hours, cooled and washed twice with 10 cm 3 of water. The precipitate is dried over CaCl 2 and the solvent is distilled off. The 3-phenyl-5 - /? - diethylaminoethyl-1,2,4-oxadiazole passes over at 0.4 mm at 127 ° C. Yield 10.5g.

2. Man suspendiert 0,1 Mol Benzamidoxim in 200 cm3 wasserfreiem Äther, rührt unter Eiskühlen energisch und gibt eine Lösung von 0,05 Mol ω-Chlorbutyrylchlorid in 20 cm3 Äther hinzu. Man rührt noch 1Z2 Stunde bei Raumtemperatur und filtriert von dem dicken Niederschlag ab. Man wäscht den Niederschlag einigemal mit Wasser, um das Chlorhydrat des Benzamidoxims zu entfernen, und trocknet im Vakuumexsikkator über P2O5. Ausbeute 92%. Schmelzpunkt 106 bis 107° C.2. 0.1 mol of benzamidoxime is suspended in 200 cm 3 of anhydrous ether, stirred vigorously with ice cooling and a solution of 0.05 mol of ω-chlorobutyryl chloride in 20 cm 3 of ether is added. The mixture is stirred for a further 1 Z 2 hours at room temperature and the thick precipitate is filtered off. The precipitate is washed several times with water in order to remove the hydrochloride of the benzamidoxime and dried in a vacuum desiccator over P 2 O 5 . Yield 92%. Melting point 106 to 107 ° C.

Bei 130° C werden 10 g oj-Chlorobutyryl-benzamidoxim, 9,1 g Diäthylamin in 40 cm3 Toluol 16 Stunden lang im geschlossenen Rohr erhitzt. Hierbei bilden sich Kristalle des Diäthylamino-chlorhydrats. Man säuert den gesamten Inhalt des Rohres mit verdünnter Salzsäure an und behandelt alsdann die wäßrige Lösung mit festem K2CO3. Sodann extrahiert man mit Äther das sich abscheidende Öl, trocknet mit Na2SO4, entfernt das Lösungsmittel und destilliert bei vermindertem Druck. Das S-Phenyl-S-S-diäthylamiaopropyl-l^^-oxadiazol siedet bei 0,1 mm bei 136° C. Ausbeute 7,3 g.At 130 ° C., 10 g of oj-chlorobutyryl-benzamidoxime, 9.1 g of diethylamine in 40 cm 3 of toluene are heated in a closed tube for 16 hours. Crystals of diethylamino-chlorohydrate are formed during this process. The entire contents of the tube are acidified with dilute hydrochloric acid and the aqueous solution is then treated with solid K 2 CO 3 . The oil which separates out is then extracted with ether, dried with Na 2 SO 4 , the solvent is removed and the mixture is distilled under reduced pressure. The S-phenyl-SS-diethylamiaopropyl-l ^^ - oxadiazole boils at 0.1 mm at 136 ° C. Yield 7.3 g.

Es wurden noch folgende, aus den nachfolgenden Tabellen ersichtlichen Verbindungen hergestellt:The following connections, which can be seen in the following tables, were also established:

Allgemeine Formel A Ji—OGeneral formula A Ji-O

N=C-CH2RN = C-CH 2 R

1.1. X = HX = H R = N(C2H5),R = N (C 2 H 5 ), R = N^R = N ^ C H.2 — C HgC H.2 - C Hg )nch3 ) after 3 Kp.0,05 115° C
Fp. des Chlorhydrats
168° C
Kp. 0 .05 115 ° C
Mp. Of the hydrochloride
168 ° C
166166 bisuntil C13H18ClN3O
gefunden Cl-Ionen
berechnet Cl-Ionen
C 13 H 18 ClN 3 O
found Cl ions
calculates Cl ions
13,15
13,24
13.15
13.24
ηττ i~* ττηττ i ~ * ττ R=N(CH3)3C1R = N (CH 3 ) 3 C1 2.2. X = HX = H prr Γ*Τ_Τprr Γ * Τ_Τ Kp-O13 155° CBp O 13 155 ° C C14H20Cl2N4OC 14 H 20 Cl 2 N 4 O CH2-CCH 2 -C gefunden Cl-Ionen
berechnet Cl-Ionen
found Cl ions
calculates Cl ions
21,46
21,41
21.46
21.41
3.3. X = HX = H Fp. (Zers.) 187° CMp (dec) 187 ° C C12H16ClN3OC 12 H 16 ClN 3 O R=N(C2H5),R = N (C 2 H 5 ), gefunden Cl-Ionen
berechnet Cl-Ionen
found Cl ions
calculates Cl ions
13,74
13,97
13.74
13.97
4.4th X=HX = H , CH2 — CH2 , CH 2 - CH 2 Kp.0>1 128° C
Fp. des Chlorhydrats
Bp 0> 1 128 ° C
Mp. Of the hydrochloride
201201 bis 203° Cup to 203 ° C C13H16ClN3O
gefunden Cl 12,49
berechnet Cl 12,58
C 13 H 16 ClN 3 O
found Cl 12.49
calculated Cl 12.58
5.5. X = ClX = Cl -CH2-C-CH 2 -C Kp.0l8 137° C
Fp. des Chlorhydrats
B.p. 0.18 137 ° C
Mp. Of the hydrochloride
180180 0C 0 C C13H17Cl2N3O
gefunden Cl-Ionen
berechnet Cl-Ionen
C 13 H 17 Cl 2 N 3 O
found Cl ions
calculates Cl ions
11,81
11,73
11.81
11.73
^ rig^ rig 6.6th X = ClX = Cl Kp.0>3 141° C; Fp. 42
Fp. des Chlorhydrats
B.p. 0> 3141 ° C; M.p. 42
Mp. Of the hydrochloride
bis
235
until
235
44°C
bis 236° C
44 ° C
up to 236 ° C
C13H15Cl2N3O
gefunden Cl-Ionen
berechnet Cl-Ionen
C 13 H 15 Cl 2 N 3 O
found Cl ions
calculates Cl ions
11,85
11,81
11.85
11.81

ι Ü97ι Ü97

Allgemeine Formel BGeneral formula B

JJ QJJ Q

N=C-CH2CH2RN = C-CH 2 CH 2 R

7.7th X=HX = H R = N(C2H5),R = N (C 2 H 5 ), r = n(r = n ( // ,CH,, CH, CH2 CH 2 CH2 CH 2 -CH2S -CH 2S / ° Kp.0,5 130° C
Fp. des Chlorhydrats 153 bis 154°
Fp. des Jodmethylats 112 bis 114°
Kp. 0, 5, 130 ° C
Mp. Of the chlorohydrate 153 to 154 °
Mp. Of the iodine methylate 112 ° to 114 °
C
C
C.
C.
C14H19N3O
gefunden
C 14 H 19 N 3 O
found
C 68,23, H
N 17,10
C 68.23, H.
N 17.10
OO 7,97,.7.97 ,.
CH2
.CH2
CH 2
.CH 2
r = n(r = n ( T? \T/r πι
K. = J.N ^2Xl5J2
T? \ T / r πι
K. = JN ^ 2 Xl 5 J 2
berechnet C 68,54, H
N 17,13
calculated C 68.54, H
N 17.13
Cl-Ionen
Cl-Ionen
Cl ions
Cl ions
7,81,7.81,
8.8th. X = HX = H R=N(CH3),R = N (CH 3 ), /CH2 / CH 2 -CH2S -CH 2S )nch3 ) after 3 Fp. des Chlorhydrats 160 bis 161°Mp. Of the chlorohydrate 160 to 161 ° CC. C12H16ClN3 C 12 H 16 ClN 3 O2 O 2 CH2 CH 2 r = n(r = n ( gefunden
berechnet
found
calculated
Cl-Ionen
Cl-Ionen
Cl ions
Cl ions
13,97
13,97
13.97
13.97
9.9. X = HX = H -CH2 -CH 2 Fp. des Chlorhydrats 190 bis 192°Mp. Of the chlorohydrate 190 to 192 ° CC. C14H18ClN3 C 14 H 18 ClN 3 iOOK gefunden
berechnet
found
calculated
Cl-Ionen
Cl-Ionen
Cl ions
Cl ions
12,25
11,99
12.25
11.99
10.10. X = HX = H Fp. des Dichlorhydrats 194 bisMp. Of the dichlorohydrate 194 bis C15H22Cl2NC 15 H 22 Cl 2 N OO 196° C196 ° C gefunden
berechnet
found
calculated
Cl' 12,81
Cl' 12,65
Cl '12.81
Cl '12.65
20,50
20,54
20.50
20.54
11.11. X = HX = H / ° Fp. des Chlorhydrats 166 bis 167°Mp. Of the chlorohydrate 166 to 167 ° CC. C14H18ClN3 C 14 H 18 ClN 3 3o 3 o -CH2n -CH 2n gefunden
berechnet
found
calculated
Cl-Ionen
Cl-Ionen
Cl ions
Cl ions
12.12th X=ClX = Cl Fp. des Chlorhydrats 159 bis 161°Mp. Of the chlorohydrate 159 to 161 ° CC. C14H19Cl2NC 14 H 19 Cl 2 N 3 O2 3 O 2 gefunden
berechnet
found
calculated
Cl-Ionen
Cl-Ionen
Cl ions
Cl ions
11,04
11,21
11.04
11.21
13.13th X=ClX = Cl 'TT /'TT / Fp. des Chlorhydrats 158 bis 159°Mp. Of the chlorohydrate 158 to 159 ° CC. C14H17Cl2NC 14 H 17 Cl 2 N gefunden
berechnet
found
calculated
11,07
10,74
11.07
10.74

X;X;

Allgemeine Formel C
.N O
General formula C
.NO

>—c{> —C {

X = H .X = H. R = N(C2H5),
/ C H2 — C H2.
R = N (C 2 H 5 ),
/ CH 2 - CH 2 .
Kp-0,1 136° C
Fp. des Chlorhydrats
Bp 0.1 136 ° C
Mp. Of the hydrochloride
130°130 ° C15H21N3O
gefunden
berechnet
C 15 H 21 N 3 O
found
calculated
C 69,39,
C 69,36,
C 69.39,
C 69.36,
H 8,17
H 8,01
H 8.17
H 8.01
14.14th X = H .X = H. R = N(^ ^O
PTT PTT
\s JnLg V^ -Ei2
/ C H2 — C H2.
R = N (^ ^ O
PTT PTT
\ s JnLg V ^ -Ei 2
/ CH 2 - CH 2 .
Kp.Oil 163° C
Fp. des Chlorhydrats
Bp Oil 163 ° C
Mp. Of the hydrochloride
194°194 ° C15H19N3O2
gefunden
berechnet
C 15 H 19 N 3 O 2
found
calculated
C 65,76,
C 65,91,
C 65.76,
C 65.91,
H 6,86
H 7,01
H 6.86
H 7.01
15.15th Λ. = XlΛ. = Xl K = JN. /CH2
CH2 — CH2
K = JN. / CH 2
CH 2 - CH 2
Kp.0>1 152° C
Fp. des Chlorhydrats
B.p. 0> 1 152 ° C
Mp. Of the hydrochloride
162°162 ° C16H21N3O
gefunden
berechnet
C 16 H 21 N 3 O
found
calculated
C 70,86,
C 70,82,
C 70.86,
C 70.82,
H 7,79
H 7,80
H 7.79
H 7.80
16.16. X = ClX = Cl R = N(C2H5),R = N (C 2 H 5 ), Kp.0i2 142° C
Fp. des Chlorhydrats
B.p. 0i2 142 ° C
Mp. Of the hydrochloride
192°192 ° C16H21Cl2N3
gefunden
berechnet
C 16 H 21 Cl 2 N 3
found
calculated
O
G-Ionen
Cl-Ionen
O
G ions
Cl ions
10,91
10,73
10.91
10.73
17.17th LX2AVLX 2 AV CC. CC. CC. CC.

Fortsetzung der TabelleContinuation of the table

X=Cl R =X = Cl R =

,CH22 , CH 2 - 2

C Hg -— C H2 , CHo,— CH2 C Hg - C H2 , CHo, - CH 2

CH2 ~~— CH2 , CHo — CHo v CH 2 ~~ - CH 2 , CHo - CHo v

:o:O

C=Cl R = NC = Cl R = N

CH2-CH2' CH2-—CH2 CH 2 -CH 2 'CH 2 -CH 2

- CHo- CHo

3-/^Naphthyl-5-/?-diäthylanmoäthyl-1,2,4^ oxadiazol-chlorhydrat3 - / ^ Naphthyl-5 - /? - diethylanmoäthyl-1,2,4 ^ oxadiazole chlorohydrate

a-Naphthyl-5-pvrroUdinopropyl-1,2,4-oxadiazol-chlorhydrat Kp.0,3 170° Ca-naphthyl-5-pvrroUdinopropyl-1,2,4-oxadiazol-chlorohydrate Kp. 0, 3 170 ° C

Fp. des Chlorhydrats 202 bis 204° CMp of the chlorohydrate 202-204 ° C

Kp.0)3 160° C/Bp. 0) 3 160 ° C /

Fp. des Chlorhydrats 188 bis 189° CMp. Of the hydrochloride 188-189 ° C

Kp.Oi4 180° C; Fp. 37 bis 39° C
Fp. des Chlorhydrats 252 bis 254° C
B.p. Oi4 180 ° C; Mp 37-39 ° C
Mp. Of the hydrochloride 252 to 254 ° C

Kp.0,e 152° CB.p. 0 , e 152 ° C

Fp. des Chlorhydrats 140 bis 141,5° CMp. Of the chlorohydrate 140 to 141.5 ° C

Fp. 146 bis 148° CMp 146-148 ° C

Fp. 116 bis 117° CMp 116-117 ° C

Claims (1)

Patentanspruch-.Claim-. Verfahren zur Herstellung neuer 1,2,4-Oxadiazole der allgemeinen FormelProcess for the preparation of new 1,2,4-oxadiazoles the general formula R—CfR-Cf SN=C—(CH2)^-N(A)2 S N = C- (CH 2 ) ^ - N (A) 2 in der R ein gegebenenfalls substituierter Arylrest, η gleich 1, 2 oder 3 ist und in welcher A gleiche oder verschiedene Alkylreste darstellt, die auch beide gemeinsam einen gegebenenfalls durch weitere Heteroatome unterbrochenen Ring bilden können, dadurch C15H19Cl2N3O2 in which R is an optionally substituted aryl radical, η is 1, 2 or 3 and in which A is identical or different alkyl radicals, which both together can also form a ring optionally interrupted by further heteroatoms, thereby C 15 H 19 Cl 2 N 3 O 2 gefunden Cl-Ionen 10,01 berechnet Cl-Ionen 10,30found Cl ions 10.01 calculated Cl ions 10.30 C15H19Cl2N3OC 15 H 19 Cl 2 N 3 O gefunden Cl-Ionen 10,48 berechnet Cl-Ionen 10,80found Cl ions 10.48 calculated Cl ions 10.80 C16H21ClN4OC 16 H 21 ClN 4 O gefunden Cl 11,07 berechnet Cl 11,05found Cl 11.07 calcd Cl 11.05 C15H20ClN3OC 15 H 20 ClN 3 O gefunden Cl' 11,65 berechnet Cl' 11,45found Cl '11.65 calcd Cl' 11.45 C18H22ClN3OC 18 H 22 ClN 3 O gefunden Cl'10,94 berechnet Cl' 10,69found Cl'10.94 calculated Cl '10.69 C13H22ClN3OC 13 H 22 ClN 3 O gefunden 10,28 berechnet 10,31found 10.28 calculates 10.31 gekennzeichnet, daß man Amidoxim derivate der allgemeinen Formelcharacterized in that amidoxime derivatives of the general formula R-C'R-C ' ;N—0 —CO-(CH2)ra—Halogen ; N-O-CO- (CH 2 ) ra -halogen 1NH2 1 NH 2 in der R und η die obige Bedeutung haben, mit sekundären Aminen der allgemeinen Formelin which R and η have the above meaning, with secondary amines of the general formula H-N(A)2 HN (A) 2 umsetzt, wobei A dieselbe Bedeutung wie oben hat, und die Oxadiazole isoliert.reacts, where A has the same meaning as above, and isolates the oxadiazoles. © 109 507/493 1.61© 109 507/493 1.61
DEA32952A 1959-09-29 1959-09-30 Process for the production of new 1, 2, 4-oxadiazoles Pending DE1097998B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1213840B (en) * 1962-03-26 1966-04-07 Acraf Process for the preparation of 1, 2, 4-oxadiazoles and their salts
US3251840A (en) * 1961-06-17 1966-05-17 Acraf 3-sulfamyl phenyl-5-aminoalkyl-1, 2, 4-oxadiazoles
DE1545658A1 (en) * 1964-03-02 1972-01-20 Chinoin Gyogyszer Es Vegyeszet Process for the preparation of oxadiazole derivatives
WO2005108382A1 (en) * 2004-05-04 2005-11-17 Merck & Co., Inc. 1,2,4-oxadiazole derivatives as dipeptidyl peptidase-iv inhibitors for the treatment or prevention of diabetes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3251840A (en) * 1961-06-17 1966-05-17 Acraf 3-sulfamyl phenyl-5-aminoalkyl-1, 2, 4-oxadiazoles
DE1213840B (en) * 1962-03-26 1966-04-07 Acraf Process for the preparation of 1, 2, 4-oxadiazoles and their salts
DE1545658A1 (en) * 1964-03-02 1972-01-20 Chinoin Gyogyszer Es Vegyeszet Process for the preparation of oxadiazole derivatives
WO2005108382A1 (en) * 2004-05-04 2005-11-17 Merck & Co., Inc. 1,2,4-oxadiazole derivatives as dipeptidyl peptidase-iv inhibitors for the treatment or prevention of diabetes
US7687492B2 (en) 2004-05-04 2010-03-30 Merck Sharp & Dohme Corp. 1,2,4-Oxadiazole derivatives as dipeptidyl peptidase-IV inhibitors for the treatment or prevention of diabetes

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