After effecting notable reforms at Clus Abbey, where he had been abbot since 1430, Dederoth was persuaded by Duke Otto of Brunswick in 1433 to undertake the reform of the extremely neglected and dilapidated Bursfelde Abbey after the previous abbot had resigned in despair.
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Sent to Germany to negotiate the transfer of monasteries from the Bursfelde Congregation, he was for half a year superior of the monastery of Rinteln, and was subsequently president-general of his order from 1635 to 1641.