Reaction #4277

Reaction equation

N-methylmorpholine

1-methyl-2-aminomethyl-5-(2'-fluorophenyl)-2,3-dihydro-1H-1,4-benzodiazepine

isobutyl chloroformate

→

oil

Yield 68.2%

1-methyl-2-[(2-methylpropoxy)carbonyl]aminomethyl-5-(2'-fluorophenyl)-2,3-dihydro-1H-1,4-benzodiazepine

Yield 68.2%

Solvents

methylene chloride

Conditions

Workup

1. 1
   workup.ADDITIONwas added to the mixture
2. 2
   OtherThe resulting reaction mixture
3. 3
   Washafter dilution and washing

Procedure

According to the method of Example 1, 1-methyl-2-aminomethyl-5-(2'-fluorophenyl)-2,3-dihydro-1H-1,4-benzodiazepine (250 mg, 0.88 mmole) and isobutyl chloroformate (114 μl, 0.88 mmole) were combined with 4 ml of dry methylene chloride, and 97 μl of N-methylmorpholine (0.88 mmole) at -5° C. was added to the mixture. The resulting reaction mixture was allowed to warm to room temperature over 2 hours, and after dilution and washing, rotoevaporation of the dried extracts of the reaction afforded 230 mg of an oil which was purified by silica gel chromatography (ethyl acetate-hexane elution, 7:3 v/v) to give the analytical sample (120 mg) which was 98% pure by HPLC.

Source