tert-Butyl piperazine-1-carboxylate → 4-[2-Hydroxy-3-(2-methylbenzothiazol-5-yloxy)propyl]-piperazine-1-carboxylic acid tert-butyl ester

Participants

Reaction Conditions

Reaction Steps

To 2-methyl-5-(oxiran-2-ylmethoxy) benzothiazole (2.21 g, 10 mmol), a compound of formula (3), was added tert-butyl 1-piperazinecarboxylate (1.86 g, 10 mmol), a compound of formula (4), and ethanol (30 ml). The resulting solution was heated to 85° C. and stirred for 8 hours. The solvent was evaporated under reduced pressure, and the residue was chromatographed on silica gel, eluting with 5% methanol/methylene chloride, to yield 4-[2-hydroxy-3-(2-methylbenzothiazol-5-yloxy)propyl]-piperazine-1-carboxylic acid tert-butyl ester as a clear oil (2.9 g, 7.1 mmol).

Provenance & Evidence