Pull Out Earliest And Latest Dates Associated With Text String In Workbook

I'm trying to pull out the earliest and latest dates associated with a text string in a workbook.

Min Max dates example.xlsx

i.e. in this example, I want one column to display the earliest date associated with DU 145, and the next column to display the latest.

From what I understand, I need an array formula to do this and have written the following, which works:

=MIN(IF($A$2:$A$6=A2,$B$2:$B$6))
(confirmed with CSE) - and the same for MAX.

Where I'm struggling is that DU 145 may be entered in the workbook as DU145, DU 145 or DU-145 and I need to take all of them into account. I tried:

=MIN(IF($A$2:$A$6="du*145",$B$2:$B$6))

As this works in a COUNTIF formula in the same sheet. But this just returns a date of 00/01/1900. I'm new to array formulae & haven't really worked them out yet. Is there a way to do this? I assume it's something to do with the way I'm entering text as removing the wildcard * makes no difference.