1,2-Dimethoxyethane → HCID 59516436, compound

Participants

Reaction Steps

Methyl (2S)-3-(3-pivaloyloxyphenyl)-2-hydroxypropionate (11 kg), 2,2,2-trichloro-1-isopropoxyethanimine (20 kg, 98 mol), 1,2-dimethoxyethane (10 L), and heptane (44 L) were mixed and stirred, and the resultant solution was cooled to 7° C. Trifluoromethanesulfonic acid (2.36 kg, 15.7 mol) was added dropwise to the reaction mixture over a period of 36 minutes, followed by stirring the reaction mixture at 25° C. for 19 hours. The reaction mixture was cooled to 7° C., to which heptane (66 L) was then added. The reaction mixture was then stirred for 45 minutes, followed by filtering off a white crystal of trichloroacetoamide. Water (55 L) was added to the filtrate for separating. Then, the organic layer was washed with a 5% sodium bicarbonate aqueous solution (52 L) twice and with water (55 L), followed by vacuum concentration to obtain 12.1 kg of the title compound (yield: 96%).

Provenance & Evidence