6,7 - dihydro - 6 - mercapto - 5h pyrazolo / 1,2 - (a / / 1,2,4 / triatsolium - intermediate products and method for their preparation

摘要

The invention relates to a compound of the formula (III) in which X- is an anion charge. The compound can be used as an intermediate for preparing carbapenem antibiotics. The invention also relates to the preparation of a compound of the formula (III) from intermediates (V) and (VI). The invention additionally relates to the intermediates (V) and (VI) and to the preparation of the intermediate (V) from the intermediate (VI). IMAGE