Sodium methanethiolate → 4-(3-Methylsulfanyl-1H-indazol-6-yl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester

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Reaction Conditions

Reaction Steps

To a mixture of 4-(3-iodo-1H-indazol-6-yl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester (213 mg, 0.50 mmol), sodium methanethiolate (39 mg, 0.55 mmol) and sodium tert-butoxide (67 mg, 0.7 mmol) in a pre-dried flask sealed under N2 was added 1 mL of a catalyst solution, which was prepared by mixing Pd(OAc)2 (12.4 mg, 0.055 mml) and JOSIPHOS CyPF-t-Bu (30.6 mg, 0.055 mmol) in DME (1.1 mL) under N2. The resulting mixture was heated in 100° C. oil bath for 5 h, then cooled and loaded onto a silica-gel column and chromatography (gradient eluant 20% to 50% EtOAc in heptane) to yield 4-(3-Methylsulfanyl-1H-indazol-6-yl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester as white crystalline solid.

Provenance & Evidence