user@comp ~
$ touch (a).1
bash: syntax error near unexpected token `a'

user@comp ~
$ touch '(a).1'

user@comp ~
$ rename -v 's/.b./b/ \(b\).*

user@comp ~
$ mkdir sdfe

user@comp ~
$ mv (a)

user@comp ~
$ mv '(a).1' sdfe

user@comp ~
$ cd sdfe

user@comp ~/sdfe
$ rename -v s/.b./b/ \(b\).*
rename: not enough arguments

Usage:
 rename [options] expression replacement file...

Options:
 -v, --verbose    explain what is being done
 -s, --symlink    act on symlink target

 -h, --help     display this help and exit
 -V, --version  output version information and exit

For more details see rename(1).

user@comp ~/sdfe
$ rename -v s/.b./b/ \(b\).*
rename: not enough arguments

Usage:
 rename [options] expression replacement file...

Options:
 -v, --verbose    explain what is being done
 -s, --symlink    act on symlink target

 -h, --help     display this help and exit
 -V, --version  output version information and exit

For more details see rename(1).

user@comp ~/sdfe
$ ls
(a).1

user@comp ~/sdfe
$ rename -v s/.b./b/ \(b\).*
rename: not enough arguments

Usage:
 rename [options] expression replacement file...

Options:
 -v, --verbose    explain what is being done
 -s, --symlink    act on symlink target

 -h, --help     display this help and exit
 -V, --version  output version information and exit

For more details see rename(1).

user@comp ~/sdfe
$ rename -v s/.b./b/ \(b\) .*

user@comp ~/sdfe
$ ls
(a).1

user@comp ~/sdfe
$ rename -v s/\(a\)/b/ \(a\).*
rename: not enough arguments

Usage:
 rename [options] expression replacement file...

Options:
 -v, --verbose    explain what is being done
 -s, --symlink    act on symlink target

 -h, --help     display this help and exit
 -V, --version  output version information and exit

For more details see rename(1).

user@comp ~/sdfe
$ rename -v s/\(a\)/b/ \(a\) .*

user@comp ~/sdfe
$ ls
(a).1

user@comp ~/sdfe
$