Isatin → (R)-1-((tetrahydrofuran-2-yl)methyl)indoline-2,3-dione

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Reaction Steps

Following the procedure as described in PREPARATION 4A, and making non-critical variations using isatin to replace 4-chloroisatin, and (R)-(tetrahydrofuran-2-yl)methyl 4-methylbenzenesulfonate to replace bromodiphenylmethane, 1-[(2R)-tetrahydrofuran-2-ylmethyl]-1H-indole-2,3-dione was obtained (47%) as a thick red oil: 1H NMR (300 MHz, CDCl3) δ7.60-7.54 (m, 2H), 7.14-7.07 (m, 2H), 4.25-4.17 (m, 1H), 3.92-3.82 (m, 2H), 3.78-3.69 (m, 2H), 2.13-2.02 (m, 1H), 1.98-1.85 (m, 2H), 1.74-1.65 (m, 1H); 13C NMR (75 MHz, CDCl3) δ183.5, 158.8, 151.8, 138.5, 125.3, 123.8, 117.7, 111.7, 68.4, 44.7, 29.3, 25.8; MS (ES+) m/z 232.1 (M+1).

Provenance & Evidence