The silver-catalyzed oxidative C(sp 3 ) À H/P À Hcrosscoupling of 1,3-dicarbonyl compounds with H-phosphonates, followed by achemo-and regioselective C(sp 3 )ÀC(CO) bondcleavage step,provided heavily functionalized b-ketophosphonates.This novel method based on areadily available reaction system exhibits wide scope,h igh functional-group tolerance, and exclusive selectivity. Scheme 1. Representative CÀXb ond-reconstruction reactions through the CÀCbond cleavage of 1,3-dicarbonyl compounds.DMF = N,Ndimethylformamide.