Downstream synthetic route of Thiomorpholine 1,1-dioxide

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 39093-93-1, and friends who are interested can also refer to it.

39093-93-1, A common heterocyclic compound, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route., 39093-93-1

Trifluoro-methanesulfonic acid 3-cyano-6,6-dimethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazol-8-yl ester (Compound B1, 30 mg, 0.069 mmol) was dissolved in 1,4-dioxane (1 mL), added with thiomorpholine 1,1-dioxide (19 mg, 2 eq.), Pd2 (dba)3 (6.3 mg, 0.1 eq.), BINAP (8.6 mg, 0.2 eq.) and K3PO4 (29 mg, 2 eq.), and stirred at 100¡ã C. overnight. The reaction solution was added to water, and then extracted with ethyl acetate. The organic layer was washed with saturated brine and dried over sodium sulfate. The drying agent was removed by filtration and the residues obtained after concentration under reduced pressure were purified by silica gel column chromatography (ethyl acetate/hexane) to obtain the target compound (white powder, 2.1 mg, 7percent). 1H-NMR (270 MHz, DMSO-d6) delta: 8. 29 (1H, d, J=8.6 Hz), 8. 07 (1H, d, J=8. 9 Hz), 8.00 (1H, s), 7. 55 (1H, dd, J=8. 5, 1. 7 Hz), 7. 34 (1H, d, J=2. 0 Hz), 7. 15 (1H, dd, J=9.1, 2.7 Hz), 4. 01 (4H, s), 3. 16 (4H, s), 1. 77 (6H, s).LCMS: m/z 420 [M+H]+

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 39093-93-1, and friends who are interested can also refer to it.

Reference£º
Patent; Chugai Seiyaku Kabushiki Kaisha; US2012/83488; (2012); A1;,
Thiomorpholine – Wikipedia
Thiomorpholine | C4H9NS – PubChem