Avatar 330 ft ir spectrophotometer

¹H- and ¹³C-NMR spectra were recorded in DMSO/CCl₄ (1/3) solution (300 MHz for ¹H and 75 MHz for ¹³C, respectively) on a Mercury 300VX spectrometer (Varian Inc., Palo Alto, CA, USA). Chemical shifts were reported as δ (parts per million) relative to TMS as internal standard. IR spectra were recorded on an Avatar 330-FT-IR spectrophotometer (Thermo Nicolet, CA, USA) and the reported wave numbers were given in cm⁻¹. All melting points were determined in an open capillary and were uncorrected. Elemental analyses were performed on a CarloErba-1106 machine (Hewlett-Packard, Milan, Italy). Quoted values were in the range ±0.4% of the theoretical ones. Crystallographic data for the structure of compound 6a were deposited with the Cambridge Crystallographic Data Center as supplementary publication no: CCDC 1918758. Copies of the data can be obtained, free of charge, on application to CCDC, 12 Union Road, Cambridge CB2 1EZ, UK (fax. +44-(0)1223-336033 or e-mail: deposit@ccdc.cam.ac.uk). Compounds 2e,f [7 (link),8 ], 2i–o [9 (link)], 3a,b,d–m,o [6 (link),10 (link),11 (link),12 (link),13 (link)], and 4a,b,d,e,g–m,o [6 (link),10 (link),11 (link),12 (link),13 (link)] were already described.

¹H and ¹³C NMR spectra were recorded in DMSO-d₆/CCl₄ (1/3) solution (300 MHz for ¹H and 75 MHz for ¹³C, respectively) on a Mercury 300VX spectrometer (Varian Inc., Palo Alto, CA, USA). Chemical shifts were reported as δ (parts per million) relative to TMS as internal standard. The IR spectra were recorded on a Nicolet Avatar 330-FT-IR spectrophotometer (Thermo Nicolet, Madison, CA, USA) in Vaseline, ν_max in cm^–1. MS spectra were recorded on Waters Q-Tof (Waters, Manchester, UK). Melting points were determined on an MP450 melting point apparatus. Elemental analyses were performed on an Elemental Analyzer Euro EA 3000. Compounds 1 [16 (link)] and 2a [16 (link)] have already been described.