反应详情

((1S,3′R,4′S,5′S,6′R)-5-chloro-6-(4-ethylbenzyl)-3′,4′,5′-trihydroxy-3′,4′,5′,6′-tetrahydro-3H-spiro[isobenzofuran-1,2′-pyran]-6′-yl)methyl 4-methylbenzenesulfonate (20 mg, 0.034 mmol) was dissolved in 1 mL of morpholine. Then the solution was allowed to reflux overnight. Concentration under reduced pressure provided the crude product, which was purified by preparative TLC to give 15 mg of title compound. 1H NMR (CD3OD, 400 MHz) δ 7.37 (s, 1H), 7.18 (s, 1H), 7.11 (d, J=8.0 Hz, 2H), 7.09 (d, J=8.8 Hz, 2H), 5.17 (d, J=13.2 Hz, 1H), 5.11 (d, J=13.2 Hz, 1H), 4.65-4.60 (m, 2H), 4.18-4.00 (m, 4H), 3.82-3.50 (m, 7H), 3.31-3.25 (m, 1H), 3.08-2.99 (m, 2H), 2.61 (q, J=7.6 Hz, 2H), 1.21 (t, J=7.6 Hz, 3H); MS ESI (m/z) 490 (M+1)+, calc. 489.

1. temperatureto reflux overnight
2. concentrationConcentration under reduced pressure
3. customprovided the crude product, which
4. customwas purified by preparative TLC