1 Terminal Alkyne Addition to Diazodicarboxylates: Synthesis of Hydrazide Linked Alkynes (Ynehydrazides) Ramsay E. Beveridge and Robert A. Batey * Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George St., Toronto ON, Canada, M5S 3H6 Fax: (+1) 416-978-5059 E-mail: rbatey@chem.utoronto.ca (R.A. Batey); rbeverid@chem.utoronto.ca (R.E. Beveridge) Supporting Information Table of Contents: Pages: General Considerations 2 Experimental Procedures 3-8 Characterization and Spectral Data 9-13 1H and 13C NMR Spectra 14-38 Representative 1D NOESY Spectra 39 References 13