How to make a synchronous request

Hi i did a request bus others request i want to receive in order like
main request > if it's ok i made other request > if the previous request was success i made a last request

i was reading and odata v2 is deprecated, with odata v4 could i do this ? or is there any way to make a function with as many requestas i need and send them all and just when all this request are ok keep executing the rest of my code ?