FIELD: chemistry.
SUBSTANCE: allobetulin sulphating is carried out in N,N-dimethylformamide with a mixture of sulphamic acid and urea at a temperature of 70-75°C for 2-3 hours, with the extraction of a target product being carried out by cooling of the reaction mass, its dilution with water, extraction with butyl or isoamyl alcohol, water washing, processing the extract with the following concentration of an alcohol layer and extraction of the target product.
EFFECT: assortment of sulphating reagents, suitable for allobetulin sulphating, is extended, environmental friendliness of the method is improved, the assortment of sulphated allobetulin derivatives is extended.
4 cl, 4 ex
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