ORGANIC LETTERS 2008 Vol. 10, No. 18 4153
Additions and Corrections Volume 10, 2008
Florin M. Istrate, Andrea K. Buzas, Igor Dias Jurberg, Yann Odabachian, and Fabien Gagosz* Synthesis of Functionalized Oxazolones by a Sequence of Cu(II)- and Au(I)-Catalyzed Transformations. When this manuscript was submitted, we were not aware of some seminal results concerning the synthesis of N-alkynyl tert-butyloxycarbamates by a copper(I)-catalyzed crosscoupling of an alkynyl bromide with a tert-butyloxycarbamate. Three other examples using KHMDS and CuI were previously reported. They were unfortunately compiled into the Beilstein database only about the time of submission of the manuscript and were therefore missed. We apologize for omitting these prior contributions and thank Prof. Rick L. Danheiser for bringing these results to our attention.
Maurice A. Marsini, Yaodong Huang, Christopher C. Lindsey, Kun-Liang Wu, and Thomas R. R. Pettus* Diastereoselective Syntheses of Chroman Spiroketals via [4 + 2] Cycloaddition of Enol Ethers and o-Quinone Methides. Page 1477. In Figure 1, the structures of berkelic acid (2) and paecilospirone (3) are misdrawn. The correct structures are shown below (Figure 1).
Page 926. The following references should therefore be added: Figure 1. Natural products that contain a chroman spiroketal.
(15) (e) Dunetz, J. R.; Danheiser, R. L. J. Am. Chem. Soc. 2005, 127, 5776-5777. (f) Kohnen, A. L.; Mak, X. Y.; Lam, T. Y.; Dunetz, J. R.; Danheiser, R. L. Tetrahedron 2006, 62, 3815-3822. (g) Villeneuve, K.; Riddell, N.; Tam, W. Tetrahedron 2006, 62, 3823-3836. (h) Danheiser, R. L.; Kohnen, A. L.; Dunetz, J. R. Org. Synth. 2007, 84, 88-101.
Page 1480. Compounds 29-31 and the X-ray crystal structure of 33 can be found in an earlier publication detailing our synthetic strategy for berkelic acid (see Huang, Y.; Pettus, T. R. R. Synlett 2008, 1353-1356). We apologize for inadvertently failing to properly reference this duplication from the earlier article.
OL801746Q
OL801779A
10.1021/ol801746q Published on Web 08/12/2008
10.1021/ol801779a Published on Web 08/21/2008
