An Approach to 2,3-Methanoamino Acids with Extended Side Chains

An Approach to 2,3-Methanoamino Acids with Extended Side Chains: Syntheses of trans-BOC-cyclo-Lys(CBZ)-OH, trans-BOC-cyclo-Glu-OEt, and ...
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10086 J. Org. Chem., Vol. 63, No. 26, 1998 Dongyeol Lim and Kevin Burgess*. An Approach to 2,3Methanoamino Acids with Extended Side Chains: Syntheses of trans-BOC-cyclo-Lys(CBZ)-OH, trans-BOC-cyclo-Glu-OEt, and trans-BOC-cyclo-Arg(CBZ)-OH.

Pages 9382-4. Compound 7 in this paper is obviously similar to compound 21 which was made via a different approach in Chang et al. (Chang, H. S.; Bergmeier S. C.; Frick J. A.; Bath A.; Rapoport H. J. Org., Chem. 1994, 59, 5336-42), though reference to this paper was overlooked in our work.

Additions and Corrections

ton, 1992; ORGN 35. (c) Shing. T. K. M.; Jiang, Q.; Mak, T. C. W. J. Org. Chem. 1998, 63, 2056. JO984024O 10.1021/jo984024o Published on Web 12/09/1998 Shinichi Saito,* Jian Zhang, and Toru Koizumi*. Synthesis and Structure of Novel Haloselenurane-Lewis Acid Complexes.

Pages 6029-30. This manuscript was accepted for publication as a Communication, but incorrectly published as a Note. JO984025G 10.1021/jo984025g Published on Web 12/09/1998

The 1994 paper also alludes to potential applications of some of their intermediates in syntheses of cyclopropane amino acids. We thank Professor Rapoport for pointing this out. JO9840224 10.1021/jo9840224 Published on Web 12/03/1998

Min Li, Leela Kar, and Michael E. Johnson*. Extraordinary Formation of a Novel Butadiene Derivative, (Z,E)-1-(2-Naphthylmethyloxycarbonylamino)-2,4-bis(4-nitrophenyl)butadiene, and Subsequent Isomerization into the Corresponding (E,E)Isomer.

Page 7519, column 1, line 16. The amount of dichlorophenylphosphine used should be (373 µL, 2.75 mmol) instead of (373 mol). JO984991Z

Vol. 63, 1998 Antonio Abad,* Consuelo Agullo´ , Manuel Arno´ , Ana C. Cun ˜ at, Benjamin Meseguer, and Ramo´ n J. Zaragoza´ . An Efficient Stereoselective Synthesis of Stypodiol and Epistypodiol.

Page 5101, footnote 8. The following previous works which use a related IMDA reaction for the construction of other tricyclic systems regrettably were omitted: (a) Taber, D.; Saleh, S. A. J. Am. Chem. Soc. 1980, 102, 5085. (b) Rawal, V. H.; Iwasa, S. Abstracts of Papers; 204th National Meeting of the American Chemistry Society, Washington, DC; American Chemical Society: Washing-

10.1021/984991z Published on Web 11/25/1998 Tomoko Kawasaki, Tatsuro Ichige, and Tomoya Kitazume*. An Efficient Stereoselective Synthesis of Fluorinated Trisubstituted Alkenes.

Page 7527, column 1. The following 13C NMR data should be added: for 2a, 115.8 (d, J ) 12.0 Hz); for 2c, 21.5 (s). JO994981D 10.1021/jo994981d Published on Web 12/09/1998