Hydrogen Peroxide → HCID 86635950, compound

Participants

Reaction Steps

To a THF solution (0.04 M) of tert-butyl {2-{4-[2-(4-allyl-2,6-dichlorophenoxy)ethoxy]benzyl}-3-[[2-chloro-5-(3-methoxypropyl)benzyl](cyclopropyl)amino]-3-oxopropyl)carbamate from Example 122, Step 5 (1 eq.) was added 9-borabicyclo[3.3.1]nonane (0.5 M THF solution, 2.6 eq.) dropwise at 0° C. The resulting solution was warmed slowly to RT over 16 h. The reaction was quenched at 0° C. with the dropwise addition of ethanol. Then, NaOH (1 N aqueous solution, 4 eq.) and H2O2 (30% w/w aqueous solution, 12 eq.) were added. After 1 h of stirring at 0° C. and another 4 h of stirring at RT, the reaction mixture was diluted with EtOAc. The organic layer was separated, washed with water, dried over Na2SO4 and filtered. Concentration of the filtrate in vacuo and purification of the crude product thus obtained by way of flash chromatography (SiO2, 3:1 (v/v) Hex:EtOAc→EtOAc), revealed the title compound.

Provenance & Evidence