dbo use only

when using "sp_dboption" to set database to 'dbo use only' , when Db is
used, we get the follwing error

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Msg 5070, Level 16, State 2, Line 1
Database state cannot be changed while other users are using the database
'IISLOG'
Msg 5069, Level 16, State 1, Line 1
ALTER DATABASE statement failed.
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I think this is logic, but Is there a system stored proc that allows to
disconnect all users after a period of time instead of looping through
all spids and killing them one by one

Thanks