I don't use Redirector, but this pattern says that the original URL must have a slash at the end of the line. Are you sure that's what you want?
I'd try leaving off the \/.
In fact, I'd try this (unless directory1's name is found in other URLs you don't want to redirect):
Pattern: directory1
Target: directory2
.htaccess would be more efficient
Try this in .htaccess
RewriteCond %{REQUEST_URI} directory1
RewriteRule directory1 directory2 [R=301,NC,L]