Sodium Thiosulfate → 2-(3-ethynyl-quinolin-6-yloxy)-N-(1-methyl-2-oxo-1-prop-2-ynyloxymethyl-ethyl)-2-methylsulfanyl acetamide

Participants

Reaction Steps

2-(3-Ethynyl-quinolin-6-yloxy)-N-(2-hydroxy-1-methyl-1-prop-2-ynyloxymethyl-ethyl)-2-methylsulfanyl-acetamide (1.0 g) from Stage 3 above in dichloromethane (40 ml) was treated with Dess-Martin periodinane (1.277 g). The reaction mixture was stirred at room temperature for 2.5 and then treated with sat. aqueous NaHCO3 and sat. aqueous sodium thiosulphate. The organic layer was washed with sat. aqueous NaHCO3. After separation, the organic phase was dried over sodium sulphate, filtered and evaporated to yield 1.10 g of 2-(3-ethynyl-quinolin-6-yloxy)-N-(1-methyl-2-oxo-1-prop-2-ynyloxymethyl-ethyl)-2-methylsulfanyl acetamide as a crude product which was used in the next step (Stage 5, described below) without any further purification. 1H NMR (CDCl3) δ ppm: [{9.51 (s), 9.49 (s) 1H}, isomer A and isomer B]; 8.86 (1H, d); 8.22 (1H, d); 8.07 (1H, d); 7.53-7.50 (1H, m); [{7.58 (s br), 7.48 (s br) 1H}, isomer A and isomer B]; 7.26 (1H, m); 5.72 (1H, s); 4.16-3.87 (4H, m); 3.28 (1H, s); 2.48 (1H, m); [{2.22 (s), 2.20 (s) 3H}, isomer A and isomer B]; 1.52 (3H, s).

Provenance & Evidence