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Basic Information
CAS No.: 29490-19-5
Name: 2-Mercapto-5-methyl-1,3,4-thiadiazole
Molecular Structure:
Molecular Structure of 29490-19-5 (2-Mercapto-5-methyl-1,3,4-thiadiazole)
Formula: C3H4N2S2
Molecular Weight: 132.21
Synonyms: 1,3,4-Thiadiazole-2(3H)-thione, 5-methyl-;5-methyl-3H-1,3,4-thiadiazole-2-thione;5-Methyl-1,3,4-thiadiazole-2(3H)-thione;D-Hydro phenyl glycine sodium methyl dane salt;2-Mercapto-5-Methyl-1,3,4-Thiadiazol;2-mercapto-5-methyl-1,3,4 thiadiazole（MMTD）;2-Methyl-5-mercapto-1,3,4-thiadiazole;
EINECS: 249-667-1
Density: 1.58 g/cm3
Melting Point: 185-188 °C
Boiling Point: 182.9 °C at 760 mmHg
Flash Point: 64.4 °C
Solubility: water: 2 g/100 mL
Appearance: white crystal powder
Hazard Symbols: IrritantXi
Risk Codes: 36/37/38
Safety: 37/39-26
PSA: 92.82000
LogP: 1.13520
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Synthetic route

C3H4N2S2*H3N

29490-19-5

2-mercapto-5-methyl-1,3,4-thiadiazole

Conditions
ConditionsYield
With hydrogenchloride In water at 30 - 35℃; for 0.5h; pH=4 - 4.5;99.9%
66666-63-5

Bis(2-methyl-1,3,4-thiadiazolyl)-5,5'-disulfide

29490-19-5

2-mercapto-5-methyl-1,3,4-thiadiazole

Conditions
ConditionsYield
With hydrazine In dichloromethane for 0.25h; Ambient temperature; further reagents;87%
38509-92-1

potassium N-acetylhydrazinodithioformate

29490-19-5

2-mercapto-5-methyl-1,3,4-thiadiazole

Conditions
ConditionsYield
With SO42-/TiO2-SnO2-Al2O3 solid super acid catalyst In tetrahydrofuran at -5 - 0℃; for 3.5h;84.2%
With sulfuric acid at 5℃;
With sulfuric acid

ammonium N-acetylhydrazinodithioformate

29490-19-5

2-mercapto-5-methyl-1,3,4-thiadiazole

Conditions
ConditionsYield
With SO42-/TiO2-SnO2-Al2O3 solid super acid catalyst In tetrahydrofuran at -5 - 0℃; for 3.5h; Reagent/catalyst;83.5%
79239-19-3

delta-3 methyl ester of cefazolin

29490-19-5

2-mercapto-5-methyl-1,3,4-thiadiazole

Conditions
ConditionsYield
With phosphate buffer at 40℃; for 0.0833333h; Rate constant;
79239-19-3

delta-3 methyl ester of cefazolin

A

25953-19-9

cefazolin

B

29490-19-5

2-mercapto-5-methyl-1,3,4-thiadiazole

C

(6R,7R)-3-(5-Methyl-[1,3,4]thiadiazol-2-ylsulfanylmethyl)-8-oxo-7-(2-tetrazol-1-yl-acetylamino)-5-thia-1-aza-bicyclo[4.2.0]oct-3-ene-2-carboxylic acid

D

117929-10-9

(6R,7R)-3-(5-Methyl-[1,3,4]thiadiazol-2-ylsulfanylmethyl)-8-oxo-7-(2-tetrazol-1-yl-acetylamino)-5-thia-1-aza-bicyclo[4.2.0]oct-3-ene-2-carboxylic acid methyl ester

Conditions
ConditionsYield
With phosphate buffer at 40℃; for 0.0833333h; Mechanism;
...Expand
75-15-0

carbon disulfide

62-55-5

thioacetamide

29490-19-5

2-mercapto-5-methyl-1,3,4-thiadiazole

Conditions
ConditionsYield
With hydrazine 1) DMF, 0-5 deg C; 2) DMF, 0-5 deg C; 3) DMF, microwave irradiation, 1 min; Yield given. Multistep reaction;
108-33-8

5-methyl-1,3,4-thiadiazol-2-amine

29490-19-5

2-mercapto-5-methyl-1,3,4-thiadiazole

Conditions
ConditionsYield
With potassium hydroxide; hydrogen bromide; copper; thiourea; sodium nitrite In ethanol
29490-19-5

2-methyl-1,3,4-thiadiazoline-5-thione

29490-19-5

2-mercapto-5-methyl-1,3,4-thiadiazole

Conditions
ConditionsYield
In argon matrix at -263.16℃; for 2.25h; UV-irradiation;
75-15-0

carbon disulfide

108-24-7

acetic anhydride

79-19-6

thiosemicarbazide

29490-19-5

2-mercapto-5-methyl-1,3,4-thiadiazole

Conditions
ConditionsYield
Stage #1: carbon disulfide; thiosemicarbazide With sodium carbonate In ethanol at 20 - 30℃; for 4.5h;
Stage #2: acetic anhydride With sulfuric acid In ethanol at 0 - 20℃; for 2h; Reflux;
...Expand
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Chemistry

   IUPAC Name: 5-methyl-3H-1,3,4-thiadiazole-2-thione  
   MF: C3H4N2S2
   MW: 132.21
   EINECS: 249-667-1
   5-METHYL-1,3,4-THIADIAZOLE-2-THIOL(29490-19-5),mp:185-188 °C ;Water Solubility;2 g/100 mL ;Appearance is white crystal powder.
Following is the molecular formula of 5-METHYL-1,3,4-THIADIAZOLE-2-THIOL(29490-19-5):
 

Uses

  5-METHYL-1,3,4-THIADIAZOLE-2-THIOL(29490-19-5) is mainly used as intermediates of cefazolin sodium.

Safety Profile

Safty informations about 5-METHYL-1,3,4-THIADIAZOLE-2-THIOL(29490-19-5):
Hazard Codes : Xi (Irritant)
Risk Statements  :
 R36/37/38 (Irritating to eyes, respiratory system and skin)
Safety Statements:  
 S37/39(Wear suitable gloves and eye/face protection )
 S26 (In case of contact with eyes, rinse immediately with plenty of water and seek medical advice )
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