反应详情

A solution of 520 mg (1.95 mmol) of trans-[4-(3-Hydroxy-prop-1-ynyl)-cyclohexyl]-methyl-carbamic acid tert-butyl ester in 14 ml CH2Cl2 was treated at 0° C. with 0.17 ml (2.14 mmol) methanesulfonylchloride, 0.235 ml (2.92 mmol) pyridine and 238 mg (1.95 mmol) DMAP. The reaction mixture was warmed up over night to room temperature, water (2 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 435 mg (65%) of trans-Methanesulfonic acid 3-[4-(tert-butoxycarbonyl-methyl-amino)-cyclohexyl]-prop-2-ynyl ester, MS: 345 (M).

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