Trimethylsilyldiazomethane → methyl N-[(5-chlorothien-2-yl)sulfonyl]-5,5,5-trifluoro-3-(2,2,2-trifluoroethyl)-dl-norvalinate

Participants

Reaction Conditions

Reaction Steps

To a solution of N-[(5-chlorothien-2-yl)sulfonyl]-5,5,5-trifluoro-3-(2,2,2-trifluoroethyl)-dl-norvaline (1.3 g, 5.23 mmol) in CH2Cl2:MeOH (4:1) TMSCHN2 (6 mL, 12 mmol) was added dropwise over 10 min at 0° C. until a neon yellow color persisted. When the dropwise addition was completed, the reaction mixture was allowed to warm to 25° C. over 19 h. The solvent was removed in vacuo to obtain methyl N-[(5-chlorothien-2-yl)sulfonyl]-5,5,5-trifluoro-3-(2,2,2-trifluoroethyl)-dl-norvalinate (0.5 g, 37.31%). Mass Spectrum (−ESI): 445 (M−H)−.

Provenance & Evidence