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[ CAS No. 38583-51-6 ] {[proInfo.proName]}

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Chemical Structure| 38583-51-6
Chemical Structure| 38583-51-6
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CAS No. :38583-51-6 MDL No. :MFCD02182966
Formula : C5H7N3OS2 Boiling Point : -
Linear Structure Formula :- InChI Key :-
M.W : 189.26 Pubchem ID :-
Synonyms :

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[ 38583-51-6 ] Synthesis Path-Upstream   1~1

  • 1
  • [ 38583-51-6 ]
  • [ 32873-57-7 ]
YieldReaction ConditionsOperation in experiment
95%
Stage #1: at 6℃; for 2.33333 h;
Stage #2: at 4℃; for 4.33333 h;
The pharmaceutical intermediate 2-acetamido-5-chlorosulfonyl-1,3,4-thiadiazole synthesis method comprises the following steps:A: 2 mol of 2-acetamido-5-methylthio-1,3,4-thiadiazole was added to the reaction vessel., control the temperature to 6 ° C,Add 2.3L potassium nitrate solution,Control stirring speed 250 rpm, reaction 140 min;B: 3 mol of lanthanum nitrate was added in 4 portions, and the temperature was controlled at 4 ° C.6 mol of 3-chlorophenol solution was added in 4 times over 80 min, the reaction was continued for 3 h, and the pH of the solution was adjusted to 6,The solid was precipitated, washed 4 times with sodium sulfate solution and 6 times with cyclobutane solution.The methylamine solution was washed 5 times, recrystallized in a t-butanol solution, and dehydrated with anhydrous calcium sulfate.The yield of the finished 2-acetamido-5-chlorosulfonyl-1,3,4-thiadiazole was 459.8 g, 95percent.
Reference: [1] Patent: CN108239047, 2018, A, . Location in patent: Paragraph 0017-0018; 0021-0022; 0023-0026
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