Water → HCID 57535349, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of (1-Ethyl-3-nitro-2-trimethylsilanyloxy-propyl)-carbamic acid tert-butyl ester (918 mg, 2.86 mmol), 1,4-Phenylene diisocyanate (1.38 g, 8.5 mmol) and 3-methyl-1-butyne (586 mg, 8.5 mmol) in dry toluene (15 mL) under N2 is added triethylamine (10 drops). The mixture is heated to 50° C. in a sealed vial for 28 h, and then cooled to room temperature Water (1 mL) is added and the mixture is stirred for an additional 2 h, then filtered. The filtrate is concentrated in vacuum and the residue is purified over 35 g silica gel, eluted with ethyl acetate: heptane (1:5) to afford {1-[(5-Isopropyl-isoxazol-3-yl)-trimethylsilanyloxy-methyl]-propyl}-carbamic acid tert-butyl ester (764 mg, 72%) as an oil.

Provenance & Evidence