Sodium Carbonate → HCID 68748691, compound

Participants

Reaction Steps

(S)-9-(4-Methoxybenzyl)-N-(1-(1,8-dichloroisoquinolin-3-yl)ethyl)-9H-purin-6-amine (1) (2.0 g, 4.2 mmol, 1.0 eq), methylboronic acid (277 mg, 4.62 mmol, 1.1 eq), Pd (PPh3)4(485 mg, 0.42 mmol, 0.1 eq) and Na2CO3(1.34 g, 12.6 mmol, 3.0 eq) were suspended in a mixture of 1,4-dioxane (30 mL) and water (10 mL). The resulting mixture was degassed and back-filled with argon three times and then stirred at reflux under argon for 16 h. The mixture was allowed to cool to RT, concentrated in vacuo and the residue was purified by column chromatography on silica gel (1-3% MeOH-DCM) to afford the product, (S)-9-(4-methoxybenzyl)-N-(1-(8-chloro-1-methylisoquinolin-3-yl)ethyl)-9H-purin-6-amine (168). Compound 168 was then converted to compound 169 using the analogous procedures for the synthesis of 151 in Example 91 except that pyridin-3-ylboronic acid was used in place of 1-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole. The PMB group of compound 169 was then subsequently deprotected using Method L to afford compound 170. ESI-MS m/z: 382.2 [M+H]+.

Provenance & Evidence