反应详情

Sodium iodide (3.93 g, 26.2 mmol) and Ex 11-Step 1 product, hydrochloride salt (step 1, 2.30 g, 8.74 mmol) in acetonitrile (20 mL) were refluxed for 3 days. The reaction mixture was cooled, concentrated and partitioned between CH2Cl2 and saturated aqueous sodium bicarbonate. The phases were separated and the aqueous phase was re-extracted twice with CH2Cl2 (total volume 750 mL). The solution was passed through a plug of silica gel (0.5″) layered with celite (0.5″) using 1:1 EtOAc/CH2Cl2 for elution to yield 1.98 g (71%) of Ex 11-Step 2 product as a brown solid: 1H NMR shows a ˜1:1 mixture of rotamers (400 MHz, CDCl3) δ 8.08-8.11 (overlapping doublets, 1H total), 7.61 (br d, J=5.3, 1H), 4.89/4.84 (br singlets, 2H total), 4.68/4.64 (br singlets, 2H total), 4.23-4.29 (overlapping quartets, 2H total), 1.32-1.37 (overlapping triplets, 3H total).

1. temperatureThe reaction mixture was cooled
2. concentrationconcentrated
3. custompartitioned between CH2Cl2 and saturated aqueous sodium bicarbonate
4. customThe phases were separated
5. extractionthe aqueous phase was re-extracted twice with CH2Cl2 (total volume 750 mL)
6. washfor elution
7. customto yield 1.98 g (71%) of Ex 11-Step 2 product as a brown solid
8. additiona ˜1:1 mixture of rotamers (400 MHz, CDCl3) δ 8.08-8.11 (overlapping doublets, 1H total), 7.61 (br d, J=5.3, 1H), 4.89/4.84 (br singlets, 2H total), 4.68/4.64 (br singlets, 2H total), 4.23-4.29 (overlapping quartets, 2H total), 1.32-1.37 (overlapping triplets, 3H total)