تفاعل #2021459

معادلة التفاعل

(−)-cocaine

→

[1R-(exo,exo)]-3-hydroxy-8-methyl-8-azabicyclo[3.2.1]octane-2-carboxylic acid

المردود 92.0%

المذيبات

HCl

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارة(gentle reflux)
2. 2
   درجة الحرارةAfter cooling to room temperature
3. 3
   استخلاصthe mixture was thoroughly extracted with ether
4. 4
   أخرىto remove the benzoic acid by-product
5. 5
   أخرىThe acidic aqueous layer was evaporated on a rotary evaporator under high vacuum
6. 6
   workup.DISSOLUTIONthe residue was redissolved in water
7. 7
   أخرىto afford a white solid that
8. 8
   أخرىno further purification (92% yield)

الإجراء التجريبي

Commercially available (−)-cocaine (Sigma Chemical Co.) was dissolved in 1.25 M HCl (1 g cocaine/12 ml). The mixture was allowed to stir for 16 hours at 110-115° C. (gentle reflux). After cooling to room temperature, the mixture was thoroughly extracted with ether to remove the benzoic acid by-product. The acidic aqueous layer was evaporated on a rotary evaporator under high vacuum and then the residue was redissolved in water and lyophilized to afford a white solid that required no further purification (92% yield).

المصدر