You could, but it would take a lot of sugar leaf and the caps would not be very potent unless your material was concentrated. I would do a QWISO or Everclear extraction then transfer the concentrate to your coconut oil and then make caps. Dry sift or bubble hash would also make your material more concentrated (yget the good stuff only). Also, some people with digestive issues don't tolerate plant material in their meds, so the solvent transfer solves that problem. Good luck, mate.