Brust connected on 6-of-9 from long range and grabbed 12 rebounds while Sam Dekker came off the bench to pop in 16 points as the Badgers (3-1) advanced to Friday's quarterfinals in Las Vegas.
George Marshall canned four 3-pointers for 12 points and Frank Kaminsky added 10 for the victors, who will next face 12th-ranked Creighton.
Khalid Mutakabbir put in 14 points and Joshua Clyburn added 10 for the Blue Hose (0-4).
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