A Highly Selective Synthesis of Dialkenyl Sulfones via Cross

ORGANIC LETTERS 2007 Vol. 9, No. 16 3199

Additions and Corrections Volume 8, 2006

Michal Bieniek, Dariusz Kołoda, and Karol Grela* A Highly Selective Synthesis of Dialkenyl Sulfones via Cross-Metathesis of Divinyl Sulfone. Page 5689. In our discussion on the reaction of substituted divinylsulfones with nitrogen nucleophiles to form thiomorpholine derivatives (Table 3), we cited Tessyot et al. as optimizing the reaction. In fact, this reaction was first described and optimized by Pathak et al. as indicated below. (1) Bera, S.; Langley, G. J.; Pathak, T. Sugar-Modified Uridine Bisvinyl Sulfone: Synthesis of a Bifunctionalized Nucleoside Michael Acceptor and Its Use in Stereoselective Tandem Cyclization. J. Org. Chem. 1998, 63, 1754-1760. (2) Pathak, T. Comment: On the bis-heteronucleophilic Michael addition to divinyl sulfone: A new efficient access to macrocycles. Eur. J. Org. Chem. 2004, 3361. OL0711826 10.1021/ol0711826 Published on Web 06/20/2007 Volume 9, 2007

Hideo Shimizu,* Daisuke Igarashi, Wataru Kuriyama, Yukinori Yusa, Noboru Sayo, and Takao Saito Asymmetric Hydrogenation of Aryl Ketones Mediated by a Copper Catalyst. Page 1656. In Figure 1, we incorrectly drew the structure of (R)-(S)-Josiphos. The correct structure should be as follows:

OL701489T 10.1021/ol701489t Published on Web 07/07/2007