cuyo/cuya/cuyos/cuyas pueden cambiar a «de + article + que/cual(es)» ??

Question

He pedido un préstamo ________ intereses se pagan al final. Acá se puede usar «del que» o «del cual» también?

Inma Sánchez · Accepted Answer

Hola Shoji
That wouldn't be possible in this sentence as it would say:
He pedido un préstamo del que / del cual intereses se pagan al final.
This wouldn't be grammatically correct because you have a noun after "intereses". Cuyo, cuya, cuyos, cuyas are always followed by a  noun. With the options that you gave "del que, del cual" you are omitting the noun as they are acting as pronouns, so you can't have a noun right after. 
You could say this instead:
He pedido un préstamo del que / del cual tendré que pagar los intereses al final. 
I hope this clarified it.
Saludos
Inma