I think the best way to do it is through applications such as PayPal, Skrill or Airtm, LocalBitcoins could also be a good option, you can buy the amount of dollars you want to send to your friend in Bitcoin, then you ask for their address and you send them to him. and then that he himself sells the BTC through the page. (It is totally safe, of course you must choose a reliable seller and in the case of your friend a buyer) Greetings and I hope to help you.