Henry Termeer

Sanofi-Aventis Opens Buyout Talks with Genzyme

French pharmaceutical giant Sanofi-Aventis sent a letter to major U.S. biotech firm Genzyme proposing a friendly takeover valued at $69 a share, or $18.4 billion. But that's significantly less than the offer of $80 a share, or $21.3 billion, that sources say Genzyme is looking for.