N-Allylthiourea synthesis
- Product Name:N-Allylthiourea
- CAS Number:109-57-9
- Molecular formula:C4H8N2S
- Molecular Weight:116.18
Yield:109-57-9 436.16 g
Reaction Conditions:
in water at 60; for 1.16667 h;Temperature;
Steps:
3 Example 3
Add 5L of 16% sodium chloride solution to the reaction vessel, 4mol3-methylisothiocyanate benzene, raise the temperature of the solution to 65 ° C, add 6mol of acrylamide and 6L of 20% acetone solution, reflux for 120min, let stand layer, remove the oil layer, wash with potassium bromide solution 7 times, obtained isopropyl thiocyanate, dehydrating agent dehydration, filtration, filtrate distillation under reduced pressure of 30 kPa, collecting fractions at 86 ° C to obtain propylene thiocyanate;Add propylene thiocyanate to 6 mol of phenylacetamide, add 2 L of aqueous solution, raise the temperature of the solution to 60 ° C, react for 70 min, lower the temperature of the solution to 15 ° C, precipitate crystals, filter, mass fraction of 80% toluene solution, mass fraction It was washed with 90% methyl ethyl ketone solution and dehydrated with anhydrous potassium carbonate dehydrating agent to obtain 436.16 g of the finished propylene thiourea with a yield of 94%.
References:
CN108264471,2018,A Location in patent:Paragraph 0011; 0013; 0014; 0015
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