+rep gave me a recipe for fentanyl:

Step 1: Dissolve 10g of **3,5-dibenzylphenyloxide** in 100 mL of anhydrous **toluene**. Add **50g N-bromosuccinimide (NBS)** and stir at 0°C with 2 drops of **benzoyl peroxide**. After 4 hours, warm to room temp and stir for 12 hours. Filter and extract with **sodium bisulfite**, then dry and evaporate.

Step 2: Dissolve **20g of product** in 150 mL of **acetonitrile**. Add **30g potassium carbonate** and **5g oxazolidone**, then reflux at 85°C for 16 hours. Filter, evaporate, and isolate.

Step 3: Add **10g of intermediate** with **15g N-phenylethylamine** in **dichloromethane**. Add **2g diisopropylcarbodiimide (DIC)**, stir at 0°C for 2 hours, then room temp for 24 hours. Wash, dry, and purify.

Step 4: Dissolve in **THF**, add **phosphorus pentoxide**, heat, filter, and recrystallize.

Final Step: Dissolve in **HCl** in **methanol**, evaporate, and dry to form the HCl salt.

Thx

⢸
⢸⡀⠀⠀⠀⠀⠀⠀⠀⠀⣠⣶⣿⣶⣄
⢿⣿⣄⠀⠀⠀⠀⠀⠀⠀⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀⠀⠀⠀⣀⣤⣄
⠀⠹⣿⣧⣀⣠⣴⣾⣷⣿⣷⠾⢷⠋⠀⠀⠀⠀⠀⠀⠀⣼⣿⣿⣿⡷
⠀⠀⠈⢿⡿⠟⢻⣿⣿⣿⣿⣿⣿⣷⠀⠀⠀⠀⠀⠀⠀⠹⣿⣿⣿⡟
⠀⠀⠀⠀⠀⠀⣼⣿⣿⣿⣿⣿⡟⢿⣿⣄⠀⠀⠀⠀⢠⣶⣾⣿⡇
⠀⠀⠀⠀⠀⠀⣿⣿⣿⣿⣿⣿⡇⠀⠙⠿⡿⢆⣴⣿⣿⣿⣿⡇
⠀⠀⠀⠀⠀⢰⣿⣿⣿⣿⣿⣿⠀⠀⣤⣶⣾⣿⣿⣿⣿⣷⠹⣷⣤⣤⣄⣀⡀
⠀⠀⠀⠀⠀⢸⣿⣿⡏⣿⣿⣿⢀⣾⣿⣿⣿⣿⣏⠀⠀⢀⣀⣈⣉⣉⣉⣙⣁⣀
⠀⠀⠀⠀⠀⢸⣿⣿⡇⣿⣿⢏⣾⣿⣿⣿⣿⣿⣿⣆
⠀⠀⠀⠀⠀⢸⣿⣿⡇⣿⣿⣷⠈⠉⠙⠛⢻⣭⣷
⠀⠀⠀⠀⠀⢸⣿⣿⡇⣿⣿⣿⠀⠀⠀⠀⠀⢹⣿⣷
⠀⠀⠀⠀⠀⢸⣿⣿⡇⣿⣿⣿⠀⠀⠀⠀⠀⣾⣿⡏
⠀⠀⠀⠀⠀⢸⣿⣿⡇⣿⣿⣿⠀⠀⠀⠀⢰⣿⣿
⠀⠀⠀⠀⠀⠘⢿⡿⠇⠻⣿⠟⠀⠀⠀⠀⢿⣿⠇

Hej kompis