METHOD 2
Step I. Use Yellow light
Reagants:
5.36g d-LSA
200ml Acetonitrile
8.82g Trifluroacetic anhydride
750ml Acetone
500g Dry Ice
Equipment:
Ice bath
Assorted Glassware
1. 5.36 g of d-lysergic
acid are suspended in 125 ml of acetonitrile and the suspension cooled to about -20 C in a bath of acetone cooled with dry ice.
2. To the suspension is added a cold (-20 C) solution of 8.82 g of trifluoroacetic anhydride in 75 ml of acetonitrile.
3. The mixture is allowed to stand at -20 C for about 1.5 hours during which the suspended material dissolves, and the d-lysergic
acid is converted to the mixed anhydride of lysergic and trifluoroacetic acids.
4. The mixed anhydride can be separated in the form of an oil by evaporating the solvent in vacuo at a temperature below 0 C, but this is not necessary.
Everything must be kept anhydrous!
Step II. Use Yellow light
Reagants:
Mixed Anhydride solution (Method 2, Step 1)
150ml Acetonitrile
7.6g Diethylamine
250ml Chloroform
70ml dH2O (chilled)
500g Anhydrous Na2SO4 (dessicant)
Equipment:
Dark Room
Vacuum distillation apparatus
Filtration set-up
Conical Flask
Dessicator (LARGE)
1. The solution of mixed anhydrides in acetonitrile from Step I is added to 150 ml of a second solution of acetonitrile containing 7.6 g of diethylamine.
2. The mixture is held in the dark at room temperature for about 2 hours.
3. The acetonitrile is evaporated in vacuo, leaving a residue of LSD-25 plus other impurities.
4. The residue is dissolved in 150 ml of chloroform and 20 ml of ice water.
5. The chloroform layer is removed and the aqueous layer is extracted with several portions of chloroform.
6. The chloroform portions are combined and in turn washed with four 50 ml portions of ice-cold water.
7. The chloroform solution is then dried over anhydrous Na2SO4 and evaporated in vacuo.