Journal Pre-proofs A Highly Divergent Pictet-Spengler Approach for Pyrrolo[1,2-a]quinoxalines from Aryl Amine Using 1,2-Dinitrobenzene as an Oxidant Sachin D. Pardeshi, Bhausaheb N. Patil, Prashant Patil, Atul C. Chaskar PII: S0040-4039(19)31030-5 DOI: https://doi.org/10.1016/j.tetlet.2019.151250 Reference: TETL 151250 To appear in: Tetrahedron Letters Received Date: 24 July 2019 Revised Date: 27 September 2019 Accepted Date: 2 October 2019 Please cite this article as: Pardeshi, S.D., Patil, B.N., Patil, P., Chaskar, A.C., A Highly Divergent Pictet-Spengler Approach for Pyrrolo[1,2-a]quinoxalines from Aryl Amine Using 1,2-Dinitrobenzene as an Oxidant, Tetrahedron Letters (2019), doi: https://doi.org/10.1016/j.tetlet.2019.151250 This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. 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. © 2019 Published by Elsevier Ltd.