Additions and corrections

AlCl₃/ICl-mediated iodo-carbocyclization of α-iodo cycloalkanones: a new entry to spirocyclic ketones

Chin-Kang Sha, Fong-Cheng Lee and Hsien-Hsun Lin

Chem. Commun., 2001, 39–40 (DOI: 10.1039/b008129i) Amendment published 17th November 2006

The authors reported a synthesis of spirocyclic ketones from α-iodo cycloalkanones bearing acetylenic side chains by treatment with AlCl₃ and ICl. After further study on this subject, the authors have now discovered that the products of this reaction were the products of addition of ICl to the terminal alkyne groups of the starting materials (Scheme 1) and not the spirocyclic ketones. The addition of ICl was facilitated by AlCl₃. In the absence of AlCl₃, this reaction gave a mixture of products.¹

1. Chin-Kang Sha, Chao-Hua Jiang and Annyt Bhattacharyya, unpublished observations.

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