2-((1,1-Dimethylethyl)imino)-N,N-diethylhexahydro-1,3-dimethyl-2lambda5-1,3,2-diazaphosphorin-2-amine → HCID 44200310, compound

Participants

Reaction Steps

The crude material of N′-((2R,3S)-2-(3-chloro-4-cyanophenylamino)-3-hydroxybutanoyl)benzohydrazide (intermediate 12b) (509 mg, 1.36 mmol) was added to THF (100 mL) stirred at room temperature. PS-BEMP (1.86 g, 4.09 mmol base) was added to the solution followed by slow addition of p-TSCl (286 mg, 1.50 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 provide the title compound (140 mg). 1H NMR (500 MHz, CDCl3, δ in ppm) 7.93 (d, J=9 Hz, 2H), 7.54 (m, 1H), 7.46 (m, 3H), 6.83 (s, 1H), 6.65 (d, J=9 Hz, 1H), 5.35 (d, J=9 Hz, 1H), 4.70 (d, J=9 Hz, 1H), 4.62 (m, 1H), 3.30 (d, J=5 Hz, 1H), 1.42 (d, J=6 Hz, 3H).

Provenance & Evidence