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Article History

Received: 18 July 2015

Accepted: 29 September 2015

First Online: 9 November 2015

Change Date: 9 December 2015

Change Type: Erratum

Change Details: In the version of this Article originally published online, the footnotes in Table 2 were incorrectly defined. The asterisk (*) should have indicated that yields were the average of two isolation experiments. Yields marked by the double dagger (ǂ) should have been defined as those determined by ¹H NMR analysis using 1,3,5-trimethoxybenzene as an internal standard. These errors have been corrected in all versions of the Article.

Competing interests

: The authors declare no competing financial interests.