تفاعل #75488

معادلة التفاعل

4-(4-nitro-benzyl)-pyridine

→

4-pyridin-4-ylmethyl-phenylamine

المردود 41.6%

المذيبات

MeOH

ظروف التفاعل

المعالجة

1. 1
   ترشيحwas filtered through Celite 521
2. 2
   غسيلThe filter aid was washed with MeOH several times
3. 3
   أخرىThe filtrate was evaporated to dryness

الإجراء التجريبي

A solution of 4-(4-nitro-benzyl)-pyridine (24 mmol, 5.1 g) in MeOH (15 mL) was hydrogenated in the presence of 500 mg palladium (10% on activated carbon). After stirring at r.t. for 20 h the reaction mixture was filtered through Celite 521. The filter aid was washed with MeOH several times. The filtrate was evaporated to dryness to afford 4-pyridin-4-ylmethyl-phenylamine (1.84 g) as a grey solid. Anal. RP-HPLC indicated a single product. A solution of this product in MeOH (15 mL) was cooled on an ice bath and was treated first with HCl (conc. 1.75 mL) followed by addition of cyanamide (50% aq soln.; 5 mL). The reaction mixture was heated at reflux for 18 h. The solvent was evaporated and the residue was washed with EtOAc/MeOH (2:1, v/v) to afford N-(4-pyridin-4-ylmethyl-phenyl)-guanidine hydrochloride (2.25 g) as a white solid.

المصدر