Northwind Group, a Manhattan-based real estate private equity firm and debt fund manager, announced the origination of a $45 million senior first-mortgage loan for the acquisition and predevelopment of 300 East 42nd Street, an 18-story office building located in Midtown East submarket of Manhattan. The loan will bridge the property’s conversion into a mixed-use asset with 135 multifamily rental units in addition to a long-term leased office component. The financing was arranged by Morris Betesh at Arrow Real Estate Advisors.