2-methyl-2,3-dihydrothiochromen-4-one

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3,4-Dihydro-2-dimethylaminomethylene-3-methyl-4-thia-1(2H)-naphthalenone was prepared from 3,4-dihydro-3-methyl-4-thia-1(2H)naphthalenone (1.55 mg, 0.87 mmol),[Clayton, S E et al. Tetrahedron (1993) 49, 939], and N,N-dimethyl formamide diethylacetal (2 ml) to give the compound as yellow crystals (161 mg). δH (CDCl3) 8.12 (1H, dd, J 1.5, 7.8 Hz), 7.50 (1H, s), 7.34-7.16 (3H, m), 4.36 (1H, q, J 7.1 Hz), 3.16 (6H, s) and 1.57 (1H, d, J 7.0 Hz). MS (ES+) 234 (MH+, 100%).

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3,4-Dihydro-2-dimethylaminomethylene-3-methyl-4-thia-1(2H)-naphthalenone was prepared from 3,4-dihydro-3-methyl-4-thia-1(2H)naphthalenone (1.55 mg, 0.87 mmol),[Clayton, S E et al. Tetrahedron (1993) 49, 939], and N,N-dimethyl formamide diethylacetal (2 ml) to give the compound as yellow crystals (161 mg). δH (CDCl3) 8.12 (1H, dd, J 1.5, 7.8 Hz), 7.50 (1H, s), 7.34-7.16 (3H, m), 4.36 (1H, q, J 7.1 Hz), 3.16 (6H, s) and 1.57 (1H, d, J 7.0 Hz). MS (ES+) 234 (MH+, 100%).

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 3,4-Dihydro-2-dimethylaminomethylene-3-methyl-4-thia-1(2H)-naphthalenone was prepared from 3,4-dihydro-3-methyl-4-thia-1(2H)naphthalenone (1.55 mg, 0.87 mmol),[Clayton, S E et al. Tetrahedron (1993) 49, 939], and N,N-dimethyl formamide diethylacetal (2 ml) to give the compound as yellow crystals (161 mg). δH (CDCl3) 8.12 (1H, dd, J 1.5, 7.8 Hz), 7.50 (1H, s), 7.34-7.16 (3H, m), 4.36 (1H, q, J 7.1 Hz), 3.16 (6H, s) and 1.57 (1H, d, J 7.0 Hz). MS (ES+) 234 (MH+, 100%).