I recorded the process and then updated the Name property to variable and got this code
Code:
Sub SaveAsRTF()
'
' SaveAsRTF Macro
'
'
ChangeFileOpenDirectory _
ActiveDocument.Path
ActiveDocument.SaveAs2 FileName:=ActiveDocument.Name & ".RTF", FileFormat:= _
wdFormatRTF, LockComments:=False, Password:="", AddToRecentFiles:=True, _
WritePassword:="", ReadOnlyRecommended:=False, EmbedTrueTypeFonts:=False, _
SaveNativePictureFormat:=False, SaveFormsData:=False, SaveAsAOCELetter:= _
False, CompatibilityMode:=0
ActiveDocument.Close
End Sub