Zn(HSO_4)_2 and Co(HSO_4)_2 has been used as efficient catalysts for the preparation of \beta-acetamido carbonyl compounds by Dakin-West reaction.
MOMENI, AHMAD REZA; SADEGHI, MARYAM; and HADIZADEH, MOTAHAREH
"A simple and efficient one-pot multicomponent synthesis of \beta-acetamido carbonyl compounds with Zn(HSO_4)_2 and Co(HSO_4)_2 as catalysts,"
Turkish Journal of Chemistry: Vol. 33:
6, Article 3.
Available at: https://journals.tubitak.gov.tr/chem/vol33/iss6/3