反应详情

A solution of 2.66 g (9.44 mmol) of trans-[4-(4-Hydroxy-but-1-ynyl)-cyclohexyl]-methyl-carbamic acid tert-butyl ester in 75 ml CH2Cl2 was treated at 0° C. with 0.81 ml (10.38 mmol) methanesulfonylchloride, 1.14 ml (14.16 mmol) pyridine and 1.15 g (9.44 mmol) DMAP. The reaction mixture was stirred at RT for 3 h, water (19 ml) was added and the reaction was stirred for 5 min. After extraction with aqueous 10% KHSO4/Et2O (3×) the organic phases were washed with aqueous saturated NaHCO3 (2×), aqueous 10% NaCl, dried over Na2SO4 and evaporated to yield 3.57 g (quantitative) of trans-Methanesulfonic acid 4-[4-(tert-butoxycarbonyl-methyl-amino)-cyclohexyl]-but-3-ynyl ester, MS: 360 (MH+).

1. stirringthe reaction was stirred for 5 min
2. extractionAfter extraction with aqueous 10% KHSO4/Et2O (3×) the organic phases
3. washwere washed with aqueous saturated NaHCO3 (2×), aqueous 10% NaCl
4. dry with materialdried over Na2SO4
5. customevaporated