反应详情

A solution of 81 g (314.77 mmol) trans-4-[(tert-Butoxyformamido)methyl]cyclohexanecarboxylic acid in 4 l CH2Cl2 was treated with 50.13 g (503.63 mmol) N,O-dimethyl-hydroxylamine hydrochloride, 55.37 ml (503.63 mmol) N-methylmorpholine and at 0° C. with 78.45 g (409.2 mmol) EDCI and 9.67 g (62.95 mmol) HOBT. The reaction mixture was stirred 16 h at room temperature, evaporated and extracted with aqueous 10% KHSO4/Et2O (3×). The organic phases were washed with aqueous saturated NaHCO3, 10% NaCl and dried over Na2SO4 to yield 100.03 g (quantitative) of trans-[4-(Methoxy-methyl-carbamoyl)-cyclohexylmethyl]-carbamic acid tert-butyl ester, MS: 301 (MH+).

1. customevaporated
2. extractionextracted with aqueous 10% KHSO4/Et2O (3×)
3. washThe organic phases were washed with aqueous saturated NaHCO3, 10% NaCl
4. dry with materialdried over Na2SO4