1,4,7,10,13,16-hexazacyclooctadecane

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

Procedure: 516 mg (2 mmol) of 1,4,7,10,13,16-hexaazacyclooctadecane (hexacyclene; Fluka) is azeotropically dehydrated with toluene. A solution of 3.35 g (15 mmol) of benzyloxycarbonyl-β-alanine (Sigma) in tetrahydrofuran (THF) as well as 3.71 g (15 mmol) of 2-ethoxy-l-ethoxycarbonyl-1,2-dihydroquinoline (EEDQ; Fluka) are added to the cooled solution of hexacyclene in toluene at room temperature and stirred overnight. After the reaction is completed, the product is precipitated by adding hexane, and the precipitate is chromatographed on silica gel with dichloromethane/hexane/isopropanol (20:10:1). the product is precipitated by adding hexane the precipitate is chromatographed on silica gel with dichloromethane/hexane/isopropanol (20:10:1)

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

Procedure: 516 mg (2 mmol) of 1,4,7,10,13,16-hexaazacyclooctadecane (hexacyclene; Fluka) is azeotropically dehydrated with toluene. A solution of 3.35 g (15 mmol) of benzyloxycarbonyl-β-alanine (Sigma) in tetrahydrofuran (THF) as well as 3.71 g (15 mmol) of 2-ethoxy-1-ethoxycarbonyl-1,2-dihydroquinoline (EEDQ; Fluka) are added to the cooled solution of hexacyclene in toluene at room temperature and stirred overnight. After the reaction is completed, the product is precipitated by adding hexane, and the precipitate is chromatographed on silica gel with dichloromethane/hexane/isopropanol (20:10:1). the product is precipitated by adding hexane the precipitate is chromatographed on silica gel with dichloromethane/hexane/isopropanol (20:10:1)

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

Procedure: 516 mg (2 mmol) of 1,4,7,10,13,16-hexaazacyclooctadecane (hexacyclene; Fluka) is azeotropically dehydrated with toluene. A solution of 3.14 g (15 mmol) of benzyloxycarbonyl-glycine (Fluka) in tetrahydrofuran (THF) as well as 3.71 g (15 mmol) of 2-ethoxy-1-ethoxycarbonyl-1,2-dihydroquinoline (EEDQ; Fluka) are added to the cooled solution of hexacyclene in toluene at room temperature and stirred overnight. After completion of the reaction, the product is precipitated by adding hexane, and the precipitate is chromatographed with dichloromethane/hexane/isopropanol (20:10:1) on silica gel. After completion of the reaction the product is precipitated by adding hexane the precipitate is chromatographed with dichloromethane/hexane/isopropanol (20:10:1) on silica gel

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

Procedure: 516 mg (2 mmol) of 1,4,7,10,13,16-hexaazacyclooctadecane (hexacyclene; Fluka) is azeotropically dehydrated with toluene. A solution of 3.35 g (15 mmol) of benzyloxycarbonyl-β-alanine (Sigma) in tetrahydrofuran (THF) as well as 3.71 g (15 mmol) of 2-ethoxy-l-ethoxycarbonyl-1,2-dihydroquinoline (EEDQ; Fluka) are added to the cooled solution of hexacyclene in toluene at room temperature and stirred overnight. After the reaction is completed, the product is precipitated by adding hexane, and the precipitate is chromatographed on silica gel with dichloromethane/hexane/isopropanol (20:10:1). the product is precipitated by adding hexane the precipitate is chromatographed on silica gel with dichloromethane/hexane/isopropanol (20:10:1)

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

Procedure: 516 mg (2 mmol) of 1,4,7,10,13,16-hexaazacyclooctadecane (hexacyclene; Fluka) is azeotropically dehydrated with toluene. A solution of 3.35 g (15 mmol) of benzyloxycarbonyl-β-alanine (Sigma) in tetrahydrofuran (THF) as well as 3.71 g (15 mmol) of 2-ethoxy-1-ethoxycarbonyl-1,2-dihydroquinoline (EEDQ; Fluka) are added to the cooled solution of hexacyclene in toluene at room temperature and stirred overnight. After the reaction is completed, the product is precipitated by adding hexane, and the precipitate is chromatographed on silica gel with dichloromethane/hexane/isopropanol (20:10:1). the product is precipitated by adding hexane the precipitate is chromatographed on silica gel with dichloromethane/hexane/isopropanol (20:10:1)

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

Procedure: 516 mg (2 mmol) of 1,4,7,10,13,16-hexaazacyclooctadecane (hexacyclene; Fluka) is azeotropically dehydrated with toluene. A solution of 3.14 g (15 mmol) of benzyloxycarbonyl-glycine (Fluka) in tetrahydrofuran (THF) as well as 3.71 g (15 mmol) of 2-ethoxy-1-ethoxycarbonyl-1,2-dihydroquinoline (EEDQ; Fluka) are added to the cooled solution of hexacyclene in toluene at room temperature and stirred overnight. After completion of the reaction, the product is precipitated by adding hexane, and the precipitate is chromatographed with dichloromethane/hexane/isopropanol (20:10:1) on silica gel. After completion of the reaction the product is precipitated by adding hexane the precipitate is chromatographed with dichloromethane/hexane/isopropanol (20:10:1) on silica gel

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

Procedure: 516 mg (2 mmol) of 1,4,7,10,13,16-hexaazacyclooctadecane (hexacyclene; Fluka) is azeotropically dehydrated with toluene. A solution of 3.35 g (15 mmol) of benzyloxycarbonyl-β-alanine (Sigma) in tetrahydrofuran (THF) as well as 3.71 g (15 mmol) of 2-ethoxy-l-ethoxycarbonyl-1,2-dihydroquinoline (EEDQ; Fluka) are added to the cooled solution of hexacyclene in toluene at room temperature and stirred overnight. After the reaction is completed, the product is precipitated by adding hexane, and the precipitate is chromatographed on silica gel with dichloromethane/hexane/isopropanol (20:10:1). the product is precipitated by adding hexane the precipitate is chromatographed on silica gel with dichloromethane/hexane/isopropanol (20:10:1)