pearlman's catalist; hydrogen; methanol;
reactants can be synthesized in 4 steps.
tetrahedron, vol. 68, 4, (2012), p. 1286 - 1298 general procedure: palladium hydroxide on carbon (20 wt percent, 100 mg) was added to a solution of azide 22 or 34 (5 mmol) in methanol (15 ml), the mixture was stirred under hydrogen at room temperat ure overnight, filtered through celite and evaporated. the residue was chromatographed on silica gel (100 g) in ethyl acetate/1,4-dioxane/ethanol/water/concd aqueous ammonia (18:3:2:1:1).
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