反应详情

Brown powder; mp 115-116° C.; UV (MeOH) λmax (log ε) 279 (3.28), 232 (3.55) nm; IR (NaCl) γmax 3421, 2909, 1652, 1515 cm−1; 1H and 13C NMR data, see Table 3; HMBC correlations: H-1/C-1′, C-21, C-61; H-2/C-1′, C-1″; H-3/C-1″, C-2″; H-5′/C-1′, C-3′, C-4′; H-6′/C-1, C-2′, C-4′; H-2″/C-3, C-1″, C-4″; H-3″/C-1″, C-4″; H-1′″/C-2′, C-41; H-4′″ and H-5′″/C-2′″, C-3′″; EIMS m/z 312 (M+, 67), 257 (12), 191 (100), 135 (74); HREIMS m/z 312.1725, calcd for C20H24O3, 312.1725.