Sodium hydride → HCID 90792305, compound

Participants

Reaction Steps

To a solution of Example 1, A3 in dry THF (0.06 M solution) at 0° C. was added NaH (60%, 1.5 eq.) portionwise, the resulting mixture was stirred for 1 hr and then SEM-Cl (1.5 eq.) was added dropwise. The solution was allowed to warm to RT and stirred for a further 3 hrs. The reaction was quenched by the addition of sat. aq. NH4Cl solution and the mixture extracted with EtOAc. The organic layer was washed with brine, dried (Na2SO4) and concentrated under reduced pressure. The crude was purified by column chromatography on silica gel eluting with 20-50% EtOAc/petroleum ether to obtain D1 as a pale brown foam. 1H NMR (400 MHz, CDCl3) δ: 8.32 (1H, s), 7.91-7.75 (5H, m), 7.49-7.37 (2H, m), 5.43 (1H, d, J=10.9 Hz), 5.26 (1H, d, J=10.9 Hz), 3.90 (4H, s), 3.86 (2H, t, J=7.4 Hz), 3.57 (1H, t, J=8.1 Hz), 2.27-2.14 (2H, m), 1.67-1.57 (4H, m), 1.49 (9H, s), 1.41-1.27 (6H, m), 0.96 (2H, t, J=7.4 Hz), 0.87 (3H, t, J=7.5 Hz), 0.07 (9H, s). MS (ES) C35H52N2O5Si requires: 608, found: 609 (M+H)+.

Provenance & Evidence