Redirect from domain to subdomain

Hello dear community

I have a simple setup: I own two domains and want to point one domain to a subdomain of the other. So: 1.com Sub.1.com 2.com

Where 2.com should point to the subdomain sub.1.com. On sub.1.com is running a wordpress in a plesk. I am seeking for real redirect, so that is why I have tried to store this in the nginx.conf.

var/etc/nginx.conf looks like this:

http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  /var/log/nginx/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;
    #tcp_nodelay        on;

    #gzip  on;
    #gzip_disable "MSIE [1-6]\.(?!.*SV1)";

    server_tokens off;

    include /etc/nginx/conf.d/*.conf;


        <^>server {
                listen 80;
                server_name 1.com;
                return 301 $scheme://2.com$request_uri;
        }<^>
}

It seems that the server entry is not sufficient. I am now unsure what else I need to change.