For the developer of Portland’s Canal Plaza, the acquisition of a neighboring block of three buildings was natural fit. East Brown Cow Management Inc. bought the Boyd Block and Four Canal Plaza, at 178-188 Middle St. and 4 Canal St., from Middle Street Holdings LLC for $11.7 million. Dan Greenstein of the Boulos Co. and Jennifer Small and Joseph Malone of Malone Commercial Brokers brokered the deal, which closed Jan. 19. East Brown Cow owns neighboring One, Two and Three Canal Plaza and Fore Street Garage. The company’s president is Tim Soley. “He was the natural buyer,” said Malone’s Jennifer Small, who represented Soley. “This particular asset made sense to Tim,” she said. “He essentially controls the entire block.”