Dimethylformamide diethylacetal → HCID 54493075, compound

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The 3,4-dihydro-2-dimethylaminomethylene-7-methoxy-4-thia-1(2H)-naphthalenone starting material was prepared from 3,4-dihydro-7-methoxy-4-thia-1(2H)naphthalenone (1.0 g, 5.2 mmol [Degani, I. et al, Boll. Sci. Fac. Chim. Ind. Bologna (1966), 24(2-3) 75-91], and N,N-dimethyl-formamide diethyl acetal (2.7 ml, 15.6 mmol) to give the product as a mustard yellow solid (1.06 g). δH (CDCl3) 7.63 (1H, J 2.9 Hz), 7.60 (1H, s), 7.17 (1H, d, J 8. Hz), 6.90 (1H, dd, J 2.9, 8.4 Hz), 3.98 (2H, s), 3.83 (3H, s) and 3.15 (6H, s). MS(EI+) 249 (M+, 66%), 205 (13%), 177 (59%), 82 (100%).

Provenance & Evidence