HEMPSTEAD, N.Y. — A joint venture between Alpha Equity Group and Vasco Ventures has purchased The Clinton Pavilion, a multi-tenanted office building located at 50 Clinton St. in Hempstead. The acquisition price was not released. The buyers have a $3 million renovation planned for the 150,000-square-foot building. The renovation includes a complete makeover of the parking structure, a redesigned lobby, updated common areas, a newly landscaped building plaza, HVAC updates and a new facade design. The name of the seller was not disclosed.