2-((1,1-Dimethylethyl)imino)-N,N-diethylhexahydro-1,3-dimethyl-2lambda5-1,3,2-diazaphosphorin-2-amine → HCID 44200769, compound

Participants

Reaction Steps

The crude material of N′-((2R,3S)-2-(4-cyanonaphthalen-1-ylamino)-3-hydroxybutanoyl)benzohydrazide (intermediate 13b) (602 mg, 1.5501 mmol) was added to THF (100 mL) stirred at room temperature. PS-BEMP (2.11 g, 4.65 mol base) was added to the solution followed by slow addition of p-TSCl (355 mg, 1.8601 mmol). The reaction mixture was stirred for 2 h and the progress of the reaction was monitored by TLC. After the completion of the reaction the BEMP reagent was filtered off and the solution concentrated to get the crude material. The crude material was chromatographed with hexanes:EtOAc (6:4) to give the product (160 mg, 28%). 1H NMR (500 MHz, CDCl3, δ in ppm) 8.11 (d, J=9 Hz, 1H), 8.01 (d, J=9 Hz, 1H), 7.83 (d, J=9 Hz, 2H), 7.69 (d, J=9 Hz, 1H), 7.62 (t, J=9 Hz, 1H), 7.52 (t, J=9 Hz, 1H), 7.45 (t, J=9 Hz, 1H), 7.36 (t, J=9 Hz, 2H), 6.64 (d, J=9 Hz, 1H), 6.20 (d, J=9 Hz, 1H), 4.93 (dd, J=5.0, 9.0 Hz, 1H), 4.70 (m, 1H), 4.06 (d, J=5 Hz, 1H), 1.47 (d, J=6 Hz, 3H).

Provenance & Evidence