%0 Journal Article %T Enantioselective Synthesis of α‐Amino‐γ‐sulfonyl Phosphonates with a Tetrasubstituted Chiral α‐Carbon via Quinine‐Squaramide‐Catalyzed Michael Addition of Nitrophosphonates to Vinyl Sulfones %A Bera, Kalisankar %A Namboothiri, Irishi N. N. %J Advanced Synthesis & Catalysis %V 355 %N 7 %P 1265-1270 %@ 1615-4150 %D 2013-05-03 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve