2-(Dicyclohexylphosphino)-2'-(dimethylamino)biphenyl → tert-Butyl trans-1-[2-(1,1-dioxido-2,3-dihydro-1,4-benzothiazepin-4(5H)-yl)-1,6-naphthyridin-4-yl]-3-hydroxypyrrolidin-4-carbamate

Participants

Reaction Conditions

Reaction Steps

To a solution of -(4-chloro-1,6-naphthyridin-2-yl)-2,3,4,5-tetrahydro-1,4-benzothiazepine 1,1-dioxide (300 mg, 0.84 mmol, prepared in analogy to 4-(4-chloro-6-methylquinolin-2-yl)-2,3,4,5-tetrahydro-1,4-benzothiazepine 1,1-dioxide in Example 2-1 by using 2,3,4,5-tetrahydro-1,4-benzothiazepine and 2,4-dichloro-1,6-naphthyridine) in 1,4-dioxane (5 mL) was added tert-butyl (trans-4-hydroxypyrrolidin-3-yl)carbamate (204 mg, 1.02 mmol), tri(dibenzylideneacetone)dipalladium(0) (39 mg, 0.042 mmol), (2′-dicyclohexylphosphanyl-biphenyl-2-yl)-dimethyl-amine (24 mg, 0.063 mmol) and sodium tert-butoxide (114 mg, 1.17 mmol) under Ar protection. The reaction mixture was heated with stirring in a 10 mL of microwave process vial for 2 hours at 120° C. The reaction mixture was concentrated in vacuo. The residue was purified by preparative HPLC to give 45 mg of the desired product (yield was 10%).

Provenance & Evidence