Accepted Manuscript Regioselective and Efficient Halogenation of 4,5-unsubstituted alkyl 3-hydrox- ypyrrole / 3-hydroxythiophene-2-yl-carboxylates Omar Castillo-Aguilera, Patrick Depreux, Ludovic Halby, Nathalie Azaroual, Paola B. Arimondo, Laurence Goossens PII: S0040-4039(17)30606-8 DOI: http://dx.doi.org/10.1016/j.tetlet.2017.05.025 Reference: TETL 48918 To appear in: Tetrahedron Letters Received Date: 8 April 2017 Accepted Date: 10 May 2017 Please cite this article as: Castillo-Aguilera, O., Depreux, P., Halby, L., Azaroual, N., Arimondo, P.B., Goossens, L., Regioselective and Efficient Halogenation of 4,5-unsubstituted alkyl 3-hydroxypyrrole / 3-hydroxythiophene-2- yl-carboxylates, Tetrahedron Letters (2017), doi: http://dx.doi.org/10.1016/j.tetlet.2017.05.025 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.