................DR ANTHONY MELVIN CRASTO Ph.D ( ICT, Mumbai) , INDIA 25Yrs Exp. in the feld of Organic Chemistry,Working for GLENMARK GENERICS at Navi Mumbai, INDIA. Serving chemists around the world. Helping them with websites on Chemistry.Million hits on google, world acclamation from industry, academia, drug authorities for websites, blogs and educational contribution
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Wednesday, 31 January 2018
the resulting crude was purified by flash chromatography on silica gel (eluted by 30–50% ethyl acetate in hexane). The collected fractions were evaporated and recrystallized from diethyl ether–hexanes (1:1, v/v) to afford N-formyl thazolidine 18 (300 g, 90% yield, 97% HPLC purity) as colorless crystals.
1H NMR (400 MHz, CDCl3, mixture of conformers (7:1), major): δ 8.35 (s, 1H), 4.89 (t, J = 8.0 Hz, 1H), 4.74 (s, 1H), 3.77 (s, 3H), 3.34–3.24 (m, 2H), 1.03 (s, 9H) ppm.
13C NMR (100 MHz, CDCl3, mixture of conformers (7:1), major): δ 170.1, 162.8, 75.3, 61.6, 52.8, 38.7, 33.0, 26.5 ppm. HRMS (ESI) m/z calcd for C10H17NO3S (M+H)+ 232.1002, found 232.1001.