8-Methyl-8-azabicyclo(3.2.1)octan-3-ol → Tropine-3-mesylate

Participants

Reaction Steps

Tropine (14.2 g, 100 mmol) was dissolved in CH2Cl2 (210 ml) and triethylamine (23 ml, 160 mmol) was added. Methanesulfonyl chloride (9.3 ml, 120 mmol) was added rapidly dropwise which caused the methylene chloride solution to reflux gently. The mixture was stirred one hour further; then extracted with cold 0.5 molar sodium hydroxide, water, and brine, dried by filtration through phase separating paper and concentrated to yield 13.8 g (65%) of title product as a yellow solid; NMR 4.88 (t, J=5 Hz, 1H), 3.10-3.05 (m, 2H), 2.94 (s, 3H), 2.22 (s, 3H), 2.20-2.10 (m, 2H), 2.02-1.88 (m, 6H).

Provenance & Evidence