A spokesperson for SL Green called the lawsuit frivolous and said it won’t impact 346 Madison Avenue, which will remain on track and on schedule. And then threw out the idea of teaming up with SL Green. But after SL Green closed the deal Rosen sued the seller — Luxottica heir and former Brooks Brothers CEO Claudio Del Vecchio — claiming they used RFR’s confidential information to help steer the deal to SL Green. SL Green then came in and bought the debt at a significant discount and continued with the foreclosure proceedings. Rosen touted the Amazon sale as a major win, but the dealings with SL Green may have left a bitter taste in his mouth.