Tetrahedron Letters 55 (2014) 4505

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Tetrahedron Letters

journal homepage: www.elsevier .com/ locate/ tet le t

Corrigendum

Corrigendum to ‘‘Short stereoselective synthesis of (+)-crispine A viaan N-sulfinyl Pictet–Spengler reaction’’ [Tetrahedron Lett. 54 (2013)1893–1896]

http://dx.doi.org/10.1016/j.tetlet.2014.06.1080040-4039/� 2014 Elsevier Ltd. All rights reserved.

q DOI of original article: http://dx.doi.org/10.1016/j.tetlet.2013.01.121⇑ Corresponding authors.

E-mail addresses: rubens@unam.mx (R. Sánchez-Obregón), joseluis.garcia.ruano@uam.es (J.L.G. Ruano).

Rubén Sánchez-Obregón a,⇑, Benjamín Ortiz a, Virginia M. Mastranzo a, Francisco Yuste a,b,José Luis García Ruano b,⇑a Instituto de Química, Universidad Nacional Autónoma de México, Coyoacán, 04510 México, D.F., Mexicob Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain

From the Prof. David M. Hodgson (University of Oxford)personal comments we wish to correct the absolute configurationof N-sulfinyl amine 1 as (S) instead of (R) as it was incorrectly writ-ten in our article. This error was inadvertently undetected becausethe reaction of (S)-menthyl-p-toluenesulfinate with lithiumamides gives (S)-p-toluenesulfinamides, since while inversion atsulfur occurs the absolute configuration is unchanged as CIP prior-ity of incoming amide falls below that of the sulfinyl oxygen

(whereas the alkoxide displaced was of higher priority than thesulfinyl oxygen). This mistake affects Schemes 2–5 and the textin the Abstract and in the left column of page 1894. A similar errorwas made in the two Letters in reference 13 (personal communica-tion from Martin J. Wanner, University of Amsterdam).

The authors would like to apologize for any inconveniencecaused.