1. Pyridinium chlorochromate. An efficient reagent for oxidation of primary and secondary alcohols to carbonyl compounds
2. Useful procedures for the oxidation of alcohols involving pyridinium dichromate in aprotic media
3. Pfaffic acid, a novel nortriterpene from Pfaffia paniculata Kuntze
4. All the new compounds gave satisfactory analytical and spectral data. The compounds 2b, 2d and 2g were obtained as diastereomeric mixtures
5. δ 1.28(s,3H,CH3), 1.64–2.4(m,2H,CH2), 2.91(t,J=7.2Hz, 2H,benzylic CH2), 3.57(d,J=2Hz,2H, OCH2), 3.82(s,3H, OCH3), 6.68–7.2(m,3H,ArH)