Wohler famously produced urea by reacting silver cyanate with ammonium chloride,
AgNCO + NH$_4$Cl $\rightarrow$ (NH$_2$)$_2$CO + AgCl
Naive question: Could this work instead with magnesium cyanate Mg(OCN)$_2$ ?
(I ask because my undergrad chem lab has HCl, Ammonia, and magnesium strips, and I'd like to make some urea, if possible. Not sure how to make magnesium cyanate, but one step at a time...)