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Short Paper | Special issue | Vol 88, No. 1, 2014, pp.779-787
Published online, 7th August, 2013
DOI: 10.3987/COM-13-S(S)45
Mosher's Amide-Based Assignment of the Absolute Configuration of Phantasmidine

Quan Zhou and Barry B. Snider*

*Department of Chemistry MS 015, Brandeis University, 415 South Street, Waltham, MA 02454-9110, U.S.A.


The absolute configuration of phantasmidine was assigned by analysis of the two conformers of the two Mosher amides. The expected shielding of the protons adjacent to the nitrogen and large long range shielding (~1 ppm) of the cyclobutane methylene protons in 16major and the pyridine protons of 16minor by the phenyl group of the Mosher amide allows the assignment of absolute configuration as shown in Schemes 4 and 5.