2120
B. DAS ET AL.
Compound 5j (minor diastereomer). 1H NMR (200 MHz, CDCl3): d
7.58–7.47 (4H, brs), 3.85 (1H, ddd, J ¼ 9.5, 9.0, 4.0 Hz), 3.31 (1H, brs), 2.51 (1H,
ddd, J ¼ 9.2, 9.0, 4.0 Hz), 2.17–1.91 (2H, m), 1.89–1.62 (2H, m), 1.49–1.10 (4H,
m); ESIMS: m=z 283, 281 [M þ Na]þ.
ACKNOWLEDGMENTS
The authors thank the Council of Scientific and Industrial Research and the
University Grants Commission, New Delhi, for financial assistance.
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