Diisopropylethylamine → HCID 178485964, compound

Participants

Reaction Steps

A solution of 1.41 g (corresponds to 3.0 mmol) of trans-Methanesulfonic acid 3-(4-methylamino-cyclohexyl)-prop-2-ynyl ester trifluoroacetate in 20 ml CH2Cl2 was first cooled at 0° C., treated with 0.5 ml (3.6 mmol) 4-chlorophenylchloroformate and then with 2.57 ml (15 mmol; 5 equivalents) of Huenigs base (during 3 min). After 45 min at RT, the mixture was dissolved in aqueous 10% KHSO4/Et2O (3×). The organic phases were washed with aqueous 10% NaCl, dried over Na2SO4 and evaporated to give 1.41 g (quantitative) of crude trans-Methanesulfonic acid 3-{4-[(4-chloro-phenoxycarbonyl)-methyl-amino]-cyclohexyl}-prop-2-ynyl ester, MS: 400 (MH+, 1Cl). The crude product was directly used in the next step.

Provenance & Evidence