Sodium Methoxide → HCID 131722941, compound

Participants

Reaction Conditions

Reaction Steps

1,3,4,6-Tetra-O-acetyl-2,5-O-methylene-D-mannitol 17 (2.8 kg, 7.73 mol) was added to chloroform (14 lit.) in 25 lit. round bottom flask with mechanical stirring. The reaction mixture was cooled to 0° C., and 0.5% NaOMe solution (6.5 lit.) was added slowly. The reaction mixture was stirred for 3 hours . The solid was filtered and dried to provide 1.0 kg (67%) of 2,5-O-methylene-D-mannitol 18, m.p. 172°-173° C., [α]D−52° (c 1.18, CHCl3), TLC (silica gel), 1:4, methanol:chloroform, Rf=0.8. 1H NMR (D20): δ 3.42 (m, 2H), 3.72 (m, 4 H), 3.97 (m, 2 H), 4.91 (s, 2 H).

Provenance & Evidence