4-chloro-1-(diphenylmethyl)-3-hydroxy-3-(6-hydroxy-2,3-dihydro-1-benzofuran-5-yl)-1,3-dihydro-2H-indol-2-one → HCID 67356963, compound

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Following the procedure as described in PREPARATION 4C, and making non-critical variations using 1-(diphenylmethyl)-3-hydroxy-3-(7-hydroxy-2,3-dihydro-1,4-benzodioxin-6-yl)-1,3-dihydro-2H-indol-2-one to replace 4-chloro-1-(diphenylmethyl)-3-hydroxy-3-(6-hydroxy-2,3-dihydro-1-benzofuran-5-yl)-1,3-dihydro-2H-indol-2-one, 1-(diphenylmethyl)-3-(7-hydroxy-2,3-dihydro-1,4-benzodioxin-6-yl)-1,3-dihydro-2H-indol-2-one was obtained (quantitative) as a pale pink solid: mp 157-160° C. (diethyl ether/hexanes); 1H NMR (300 MHz, DMSO-d6) δ9.19 (br s, 1H), 7.42-7.27 (m, 10H), 6.98-6.91 (m, 3H), 6.88-6.82 (m, 1H), 6.69-6.63 (m, 1H), 6.37 (d, J=7.8 Hz, 1H), 6.30 (s, 1H), 4.81 (s, 1H), 4.21-4.11 (m, 4H); 13C NMR (75 MHz, DMSO-d6) δ176.2, 149.2, 142.8, 142.6, 138.2, 137.8, 135.8, 130.1, 128.6, 128.4, 128.3, 128.2, 127.7, 1275, 126.8, 123.6, 121.7, 118.9, 117.0, 110.6, 103.8, 64.3, 63.8, 57.4, 47.4; MS (ES+) m/z 450.3 (M+1).

Provenance & Evidence