What is the longest range single-pilot certified (FAA and/or EASA) business jet?
There aren't any civilian, current-production jets that come close to the range of the SJ30 for single pilot operations based on my research, although one or two turboprops have comparable ranges. I consulted Aviation Week's "Business Airplane's 2012" and the only other light jets listed with a long range are the Embraer Phenom 300 with a range of 1,954 nm, and the Cessna Citation CJ4 with a range of 1,913 nm.  The Cessna CJ3 comes in at a respectable 1,869 nm. The PC-24, which is still undergoing certification in 2016, is listed here with an NBAA range of 1,950 nm. All of these are (or will be) single-pilot certified in at least one cockpit configuration, to my knowledge.  

Is there any reason you're restricting this to jets and not turboprops? (Speed is one of the biggest differences between the two categories.) The King Air 350IER has a range of 2,239 nm.  Several other turboprops have ranges that are comparable to average light business jets, like the PC-12 NG which has a  range of 1,544 nm. 

Here's a graph of my own making to show these statistics:



For any readers unfamiliar with the restrictions regarding FAA approval for single-pilot operations, here's a good source: http://www.flyingmag.com/single-pilot-jets . The biggest stipulation is that transport category aircraft (12,500+ lb MTOW or not commuter category) are assumed to be two-pilot aircraft. 

Note:  all ranges listed here except the PC-24's range are NBAA IFR max fuel ranges w/ 100 nm alternate as listed in Aviation Week's "Business Airplanes 2012"