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27th March 2012 @ 01:48
SM recovered. === Synthesis of an oxazole linked aryl pyrrole ester from PMY 42-1 and ethyl bromopyruvate. Intermediate in synthesis of ester isostere of TCMDC-123812 PMY 10-6 [b]Reaction Start Time: 15.50 27/03/12[/b] PMY 42-1 (80 mg, 0.34 mmol, 1 equiv.) and dried NaHCO3 (145 mg, 1.72 mmol, 5.0 equiv.) were stirred in dry THF (8 mL) at room temperature. Ethyl bromopyruvate (52 μL, 0.41 mmol, 1.2 equiv.) was added and the reaction heated to 57 °C. After 18 hours, reaction showed mostly SM by TLC. A further portion of ethyl bromopyruvate (26 &muL;, 0.20 mmol, 0.6 equiv.) was added and the reaction refluxed for 3 hours and then cooled. The mixture was filtered through celite then concentrated under high vacuum to a brown oil (84 mg). 1H NMR mainly SM. Mass spec is inconclusive. [b]Mass Spec:[/b] [data]2178[/data] [b]NMR:[/b] [data]3690[/data] [b]Reference:[/b] doi:[url=]10.1021/jo048106q[/url] doi:[url=]10.1021/jo702305g[/url] [b]See also:[/b] [blog]2704[/blog] [url=]Discussion[/url] on The Synaptic Leap. [b]Risk and Hazard Assessment:[/b] [data]2114[/data] [b]InChi:[/b] Starting Material: InChI=1S/C13H13FN2O/c1-8-7-12(13(15)17)9(2)16(8)11-5-3-10(14)4-6-11/h3-7H,1-2H3,(H2,15,17) Product: InChI=1S/C18H17FN2O3/c1-4-23-18(22)16-10-24-17(20-16)15-9-11(2)21(12(15)3)14-7-5-13(19)6-8-14/h5-10H,4H2,1-3H3
Attached Files
ESI mass spec
1H NMR crude
Re: Synthesis of aryl pyrrole oxazole ester (PMY 45-1) by OSDD Malaria
25th January 2014 @ 02:02
Related to methyl ester OSM-S-62