تفاعل #219363

معادلة التفاعل

3-(2-Hydroxymethyl-4-tert-butoxycarbonylamino-5-methyl-phenyl)-2-(R)-benzyloxycarbonylamino-propionic acid methyl ester

Triethylamine

methanesulfonyl chloride

→

Title compound

المردود 91.0%

3-(2-Chloromethyl-4-tert-butoxycarbonylamino-5-methyl-phenyl)-2-(R)-benzyloxycarbonylamino-propionic acid methyl ester

المردود 91.0%

المذيبات

dichoromethane

dichloromethane

ظروف التفاعل

المعالجة

1. 1
   غسيلthen washed once with water, twice with 1N hydrochloric acid
2. 2
   تجفيفOrganics were dried (magnesium sulfate)
3. 3
   ترشيحfiltered
4. 4
   تركيزconcentrated in vacuo

الإجراء التجريبي

3-(2-Hydroxymethyl-4-tert-butoxycarbonylamino-5-methyl-phenyl)-2-(R)-benzyloxycarbonylamino-propionic acid methyl ester (510 mg, 1.1 mmol) was dissolved in dichoromethane (5 mL). Triethylamine (250 μL, 1.8 mmol) was added to the mixture followed by methanesulfonyl chloride (100 μL, 1.3 mmol). Mixture was stirred at room temperature for 1.5 hours. Mixture was diluted with dichloromethane then washed once with water, twice with 1N hydrochloric acid, and once with brine. Organics were dried (magnesium sulfate), filtered and concentrated in vacuo. Title compound was obtained as white solid in 91% yield. MS m/e (M+H)+=491.

المصدر