FIELD: chemistry.
SUBSTANCE: method of producing 1,6:2,3-dianhydro-β-D-mannopyranose 
(compound I) is characterised by that it includes a step for cyclisation of compound B (given below) 
, in which R is an activator, in the presence of a base selected from hydroxides of ammonia and inorganic bases. The present method also includes a step of activating compound A (see below) 
, which enables to obtain compound B after which the step for cyclisation of compound B is carried out.
EFFECT: short synthesis path.
12 cl
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