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3-Amino-5-methoxyisoxazole is a heterocyclic organic compound characterized by the presence of an isoxazole ring with an amino group at the 3-position and a methoxy group at the 5-position. It is a versatile intermediate in organic synthesis and possesses unique chemical properties due to its heterocyclic structure.

32326-25-3

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32326-25-3 Usage

Uses

Used in Pharmaceutical Industry:
3-Amino-5-methoxyisoxazole is used as a key reactant in the synthesis of pyrazolidine derivatives and 1-substituted tetrazoles. These compounds are of significant interest in the pharmaceutical industry due to their diverse range of biological activities, including antimicrobial, antiviral, and anticancer properties. The cyclization of amines with 3-amino-5-methoxyisoxazole allows for the development of novel therapeutic agents with improved pharmacological profiles.
Used in Organic Synthesis:
3-Amino-5-methoxyisoxazole is also used as a building block in the synthesis of various organic compounds, such as heterocycles, natural products, and pharmaceuticals. Its unique structure and reactivity make it a valuable component in the design and synthesis of complex organic molecules with potential applications in various fields, including materials science, agrochemistry, and medicinal chemistry.

Check Digit Verification of cas no

The CAS Registry Mumber 32326-25-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,2,3,2 and 6 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 32326-25:
(7*3)+(6*2)+(5*3)+(4*2)+(3*6)+(2*2)+(1*5)=83
83 % 10 = 3
So 32326-25-3 is a valid CAS Registry Number.

32326-25-3SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 16, 2017

Revision Date: Aug 16, 2017

1.Identification

1.1 GHS Product identifier

Product name 5-methoxy-1,2-oxazol-3-amine

1.2 Other means of identification

Product number -
Other names 5-Methoxyisoxazol-3-amine

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:32326-25-3 SDS

32326-25-3Synthetic route

1-cyano-2,2-bis(methoxy)ethylene
15732-02-2

1-cyano-2,2-bis(methoxy)ethylene

3-amino-5-methoxyisoxazole
32326-25-3

3-amino-5-methoxyisoxazole

Conditions
ConditionsYield
With sodium hydroxide; hydroxylamine hydrochloride In methanol at 45 - 60℃; for 7h;75%
With sodium hydroxide; hydroxylamine hydrochloride In methanol; water70.6%
orthoformic acid triethyl ester
122-51-0

orthoformic acid triethyl ester

3-amino-5-methoxyisoxazole
32326-25-3

3-amino-5-methoxyisoxazole

5-methoxy-3-(1H-tetrazol-1-yl)isoxazole

5-methoxy-3-(1H-tetrazol-1-yl)isoxazole

Conditions
ConditionsYield
With sodium azide In neat (no solvent) at 90℃; for 0.666667h; Reagent/catalyst; Green chemistry;91%
C20H20F3NO4S

C20H20F3NO4S

3-amino-5-methoxyisoxazole
32326-25-3

3-amino-5-methoxyisoxazole

1-(2-(5-methoxyisoxazol-3-yl-amino)ethyl)-7-(trifluoromethyl)-3,4-dihydro-1H-benzo[b]azepin-5(2H)-one

1-(2-(5-methoxyisoxazol-3-yl-amino)ethyl)-7-(trifluoromethyl)-3,4-dihydro-1H-benzo[b]azepin-5(2H)-one

Conditions
ConditionsYield
With potassium hydrogencarbonate In methanol for 8h; Reflux;88%
potassium thioacyanate
333-20-0

potassium thioacyanate

methyl chloroformate
79-22-1

methyl chloroformate

3-amino-5-methoxyisoxazole
32326-25-3

3-amino-5-methoxyisoxazole

(5-methoxycarbonylamino-[1,2,4]thiadiazol-3-yl)-acetic acid methyl ester
149196-71-4

(5-methoxycarbonylamino-[1,2,4]thiadiazol-3-yl)-acetic acid methyl ester

Conditions
ConditionsYield
In acetonitrile 1.) 70 deg C, 30 min; 2.) 5 deg C, 10 min then 20 deg C, 15 min;86%
1.) MeCN, 70 deg C, 30 min, 2.) MeCN, a) 5 deg C, 10 min, b) RT, 15 min; Yield given. Multistep reaction;
potassium thioacyanate
333-20-0

potassium thioacyanate

chloroformic acid ethyl ester
541-41-3

chloroformic acid ethyl ester

3-amino-5-methoxyisoxazole
32326-25-3

3-amino-5-methoxyisoxazole

methyl 2-(5-ethoxycarbonylamino-1,2,4-thiadiazol-3-yl)acetate
150215-07-9

methyl 2-(5-ethoxycarbonylamino-1,2,4-thiadiazol-3-yl)acetate

Conditions
ConditionsYield
In acetonitrile 1.) 70 deg C, 30 min; 2.) 5 deg C, 10 min then 20 deg C, 15 min;83%
1.) MeCN, 70 deg C, 30 min, 2.) MeCN, a) 5 deg C, 10 min, b) RT, 15 min; Yield given. Multistep reaction;
methyl chloroformate
79-22-1

methyl chloroformate

3-amino-5-methoxyisoxazole
32326-25-3

3-amino-5-methoxyisoxazole

(5-methoxycarbonylamino-[1,2,4]thiadiazol-3-yl)-acetic acid methyl ester
149196-71-4

(5-methoxycarbonylamino-[1,2,4]thiadiazol-3-yl)-acetic acid methyl ester

Conditions
ConditionsYield
In acetonitrile80.6%
chloroformic acid ethyl ester
541-41-3

chloroformic acid ethyl ester

3-amino-5-methoxyisoxazole
32326-25-3

3-amino-5-methoxyisoxazole

methyl 2-(5-ethoxycarbonylamino-1,2,4-thiadiazol-3-yl)acetate
150215-07-9

methyl 2-(5-ethoxycarbonylamino-1,2,4-thiadiazol-3-yl)acetate

Conditions
ConditionsYield
In acetonitrile78.9%
potassium thioacyanate
333-20-0

potassium thioacyanate

phenyl chloroformate
1885-14-9

phenyl chloroformate

3-amino-5-methoxyisoxazole
32326-25-3

3-amino-5-methoxyisoxazole

methyl 2-(5-phenoxycarbonylamino-1,2,4-thiadiazol-3-yl)acetate
150215-08-0

methyl 2-(5-phenoxycarbonylamino-1,2,4-thiadiazol-3-yl)acetate

Conditions
ConditionsYield
In acetonitrile 1.) 70 deg C, 30 min; 2.) 5 deg C, 10 min then 20 deg C, 15 min;60%
1.) MeCN, 70 deg C, 30 min, 2.) MeCN, a) 5 deg C, 10 min, b) RT, 15 min; Yield given. Multistep reaction;
Benzoyl isothiocyanate
532-55-8

Benzoyl isothiocyanate

3-amino-5-methoxyisoxazole
32326-25-3

3-amino-5-methoxyisoxazole

methyl 2-(5-phenylcarbonylamino-1,2,4-thiadiazol-3-yl)acetate

methyl 2-(5-phenylcarbonylamino-1,2,4-thiadiazol-3-yl)acetate

Conditions
ConditionsYield
In tetrahydrofuran; ethanol57.7%
phenyl chloroformate
1885-14-9

phenyl chloroformate

3-amino-5-methoxyisoxazole
32326-25-3

3-amino-5-methoxyisoxazole

methyl 2-(5-phenoxycarbonylamino-1,2,4-thiadiazol-3-yl)acetate
150215-08-0

methyl 2-(5-phenoxycarbonylamino-1,2,4-thiadiazol-3-yl)acetate

Conditions
ConditionsYield
In acetonitrile57.4%
potassium thioacyanate
333-20-0

potassium thioacyanate

benzyl chloroformate
501-53-1

benzyl chloroformate

3-amino-5-methoxyisoxazole
32326-25-3

3-amino-5-methoxyisoxazole

methyl 2-(5-benzyloxycarbonylamino-1,2,4-thiadiazol-3-yl)acetate
150215-09-1

methyl 2-(5-benzyloxycarbonylamino-1,2,4-thiadiazol-3-yl)acetate

Conditions
ConditionsYield
In acetonitrile 1.) 70 deg C, 30 min; 2.) 5 deg C, 10 min then 20 deg C, 15 min;40%
1.) MeCN, 70 deg C, 30 min, 2.) MeCN, a) 5 deg C, 10 min, b) RT, 15 min; Yield given. Multistep reaction;
benzyl chloroformate
501-53-1

benzyl chloroformate

3-amino-5-methoxyisoxazole
32326-25-3

3-amino-5-methoxyisoxazole

methyl 2-(5-benzyloxycarbonylamino-1,2,4-thiadiazol-3-yl)acetate
150215-09-1

methyl 2-(5-benzyloxycarbonylamino-1,2,4-thiadiazol-3-yl)acetate

Conditions
ConditionsYield
In acetonitrile24.9%
[2-methyl-1-(pyrazolidine-1-carbonyl)-butyl]-carbamic acid tert-butyl ester

[2-methyl-1-(pyrazolidine-1-carbonyl)-butyl]-carbamic acid tert-butyl ester

phosgene
75-44-5

phosgene

3-amino-5-methoxyisoxazole
32326-25-3

3-amino-5-methoxyisoxazole

{1-[2-(5-methoxy-isoxazol-3-ylcarbamoyl)-pyrazolidine-1-carbonyl]-2-methyl-butyl}-carbamic acid tert-butyl ester

{1-[2-(5-methoxy-isoxazol-3-ylcarbamoyl)-pyrazolidine-1-carbonyl]-2-methyl-butyl}-carbamic acid tert-butyl ester

Conditions
ConditionsYield
With pyridine In dichloromethane; toluene at 20℃;
methyl chloroformate
79-22-1

methyl chloroformate

3-amino-5-methoxyisoxazole
32326-25-3

3-amino-5-methoxyisoxazole

[5-Amino-3-(1,2,4-thiadiazole)]acetic acid, methyl ester

[5-Amino-3-(1,2,4-thiadiazole)]acetic acid, methyl ester

Conditions
ConditionsYield
In tetrahydrofuran; water

32326-25-3Relevant articles and documents

Process for preparing 1,2,4-thiadiazole derivatives

-

, (2008/06/13)

An improved process for the production of 5-amino-1,2,4-thiadiazol-3-yl-(2-(lower)-alkoxyimino)acetic acids starting from 5-substituted- or unsubstituted-3-amino-isoxazole compounds is disclosed herein. The title compounds are useful as acylating agents for the production of 7-acylaminocephalosporins.

Practical preparation of (Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-methoxyiminoacetic acid: A side-chain of the fourth generation of cephem antibiotics

Tatsuta,Miura,Gunji,Tamai,Yoshida,Inagaki,Kurita

, p. 1701 - 1707 (2007/10/02)

A Z-isomer (4) of 2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(methoxyimino)acetic acid, which is the common acyl moiety of clinically useful cephem antibiotics, has been prepared from the aminoisoxazoles through the skeletal rearrangement in several routes. Reaction of 3-amino-5-methoxyisoxazole (7) with alkoxycarbonyl isothiocyanates gave methyl 2-(5-alkoxycarbonylamino-1,2,4-thiadiazol-3-yl)acetates (8), which were converted into the target compound 4 through the reaction of the corresponding keto ester with O-methylhydroxylamime. Compound 4 was prepared similarly from 3-aminoisoxazole (10). Also, O-methylation of 2-hydroxyimino-2-(5-methoxycarbonylamino-1,2,4-thiazol-3-yl)acetate (15) with methyl iodide or dimethyl sulfate in the presence of barium oxide and barium hydroxide octahydrate was found to afford exclusively the desired Z-isomer (14a) of methyl 2-(5-methoxycarbonylamino-1,2,4-thiadiazol-3-yl)-2-(methoxyimino)aceta te, which was led to 4.

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