2-amino-2-(hydroxymethyl)propane-1,3-diol

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 2-amino-9-[(2S)-2-aminopropyl]-9H-pyrido[2,3-b]indole-3-carboxamide (30, 100 mg, 0.350 mmol) in methylene chloride (3 mL) was added PL-DCC resin (394 mg, 0.575 mmol) and the mixture was stirred at room temperature for 15 min. N,N′-bis-tert-butoxycarbonylthiourea (112 mg, 0.406 mmol) was added and the reaction mixture was stirred at room temperature overnight. PS-trisamine resin (4.12 g, 3.6 mmol/g, 14.8 mmol) was subsequently added and the resulting mixture was stirred at room temperature overnight. The resins were removed by suction filtration and the filtrate was concentrated under reduced pressure. Purification of the crude material by reverse phase C-18 silica gel chromatography [0-70% acetonitrile in water (containing 0.1% TFA)] afforded 2-amino-9-((2S)-2-{[amino(imino)methyl]amino}propyl)-9H-pyrido[2,3-b]indole-3-carboxamide (71, 48 mg 26%). NH4OAc standard conditions. DAD Retention time=4.98 min. M+H=326. the reaction mixture was stirred at room temperature overnight the resulting mixture was stirred at room temperature overnight The resins were removed by suction filtration the filtrate was concentrated under reduced pressure Purification of the crude material by reverse phase