[(E)-3,3-dimethylbut-1-enyl]boronic acid

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A microwave vial was charged with (rac)-2′-Chloro-7′-(5-pyrimidinyl)spiro[1,3-oxazole-4,9′-xanthen]-2-amine (90 mg, 247 μmol), Pd2 dba3 (11 mg, 12 μmol), X-Phos (12 mg, 25 μmol), (E)-3,3-dimethylbut-1-enylboronic acid (63 mg, 493 μmol) and potassium phosphate (157 mg, 740 μmol). THF (2 mL) was added and the mixture was heated at 120° C. in microwave reactor for 2 hrs. The mixture was diluted with ethyl acetate and filtered through plug of Celite. After removal of the solvents the residue was purified by flash chromatography on silica gel (12 g Redi-Sep column, 20-100% DCM/MeOH/NH4OH 90:10:1 in DCM) to give 2′-(3,3-dimethylbut-1-enyl)-7′-(pyrimidin-5-yl)-5H-spiro[oxazole-4,9′-xanthen]-2-amine (65 mg, 64% yield). This product was hydrogenated at 1 atm of H2 in MeOH/EtOAc mixture using 10% palladium on carbon (53 mg, 49 μmol) for 60 hrs. The reaction mixture was filtered and concentrated in vacuo and was further purified by reverse-phase HPLC (10-90% CH3CN/H2O with 0.1% TFA). The fractions containing product were combined and dried overnight under high vacuum to give 2′-(3,3-dimethylbutyl)-7′-(pyrimidin-5-yl)-5H-spiro[oxazole-4,9′-xanthen]-2-amine as its TFA salt. filtered through plug of Celite After removal of the solvents the residue was purified by flash chromatography on silica gel (12 g Redi-Sep column, 20-100% DCM/MeOH/NH4OH 90:10:1 in DCM)

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A microwave vial was charged with (rac)-2′-Chloro-7′-(5-pyrimidinyl)spiro[1,3-oxazole-4,9′-xanthen]-2-amine (90 mg, 247 μmol), Pd2 dba3 (11 mg, 12 μmol), X-Phos (12 mg, 25 μmol), (E)-3,3-dimethylbut-1-enylboronic acid (63 mg, 493 μmol) and potassium phosphate (157 mg, 740 μmol). THF (2 mL) was added and the mixture was heated at 120° C. in microwave reactor for 2 hrs. The mixture was diluted with ethyl acetate and filtered through plug of Celite. After removal of the solvents the residue was purified by flash chromatography on silica gel (12 g Redi-Sep column, 20-100% DCM/MeOH/NH4OH 90:10:1 in DCM) to give 2′-(3,3-dimethylbut-1-enyl)-7′-(pyrimidin-5-yl)-5H-spiro[oxazole-4,9′-xanthen]-2-amine (65 mg, 64% yield). This product was hydrogenated at 1 atm of H2 in MeOH/EtOAc mixture using 10% palladium on carbon (53 mg, 49 μmol) for 60 hrs. The reaction mixture was filtered and concentrated in vacuo and was further purified by reverse-phase HPLC (10-90% CH3CN/H2O with 0.1% TFA). The fractions containing product were combined and dried overnight under high vacuum to give 2′-(3,3-dimethylbutyl)-7′-(pyrimidin-5-yl)-5H-spiro[oxazole-4,9′-xanthen]-2-amine as its TFA salt. filtered through plug of Celite After removal of the solvents the residue was purified by flash chromatography on silica gel (12 g Redi-Sep column, 20-100% DCM/MeOH/NH4OH 90:10:1 in DCM)

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A microwave vial was charged with (rac)-2′-Chloro-7′-(5-pyrimidinyl)spiro[1,3-oxazole-4,9′-xanthen]-2-amine (90 mg, 247 μmol), Pd2 dba3 (11 mg, 12 μmol), X-Phos (12 mg, 25 μmol), (E)-3,3-dimethylbut-1-enylboronic acid (63 mg, 493 μmol) and potassium phosphate (157 mg, 740 μmol). THF (2 mL) was added and the mixture was heated at 120° C. in microwave reactor for 2 hrs. The mixture was diluted with ethyl acetate and filtered through plug of Celite. After removal of the solvents the residue was purified by flash chromatography on silica gel (12 g Redi-Sep column, 20-100% DCM/MeOH/NH4OH 90:10:1 in DCM) to give 2′-(3,3-dimethylbut-1-enyl)-7′-(pyrimidin-5-yl)-5H-spiro[oxazole-4,9′-xanthen]-2-amine (65 mg, 64% yield). This product was hydrogenated at 1 atm of H2 in MeOH/EtOAc mixture using 10% palladium on carbon (53 mg, 49 μmol) for 60 hrs. The reaction mixture was filtered and concentrated in vacuo and was further purified by reverse-phase HPLC (10-90% CH3CN/H2O with 0.1% TFA). The fractions containing product were combined and dried overnight under high vacuum to give 2′-(3,3-dimethylbutyl)-7′-(pyrimidin-5-yl)-5H-spiro[oxazole-4,9′-xanthen]-2-amine as its TFA salt. filtered through plug of Celite After removal of the solvents the residue was purified by flash chromatography on silica gel (12 g Redi-Sep column, 20-100% DCM/MeOH/NH4OH 90:10:1 in DCM)

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

Procedure: Treatment of (±)-(7-bromo-2,3-dihydro-1-benzofuran-2-yl)methyl 4-methylbenzenesulfonate (8.0 g, 20.87 mmol) with [E]-2-tert-butylvinylboronic acid (4.01 g, 31.31 mmol), dichlorobis(tri-o-tolylphosphine)-palladium(II) (0.82 g, 1.04 mmol), and potassium carbonate (7.21 g, 52.19 mmol) generally according to the procedure described for Intermediate 37 provided 6.54 g (81%) of (±)-{7-[(1E)-3,3-dimethylbut-1-enyl]-2,3-dihydro-1-benzofuran-2-yl}methyl 4-methylbenzenesulfonate as a white solid. mp 85-88° C.; Anal. calcd. for C22H26O4S: C, 68.37; H, 6.78. Found: C, 68.27; H, 6.86.

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A microwave vial was charged with (rac)-2′-Chloro-7′-(5-pyrimidinyl)spiro[1,3-oxazole-4,9′-xanthen]-2-amine (prepared in a manner similar to Example 39; 90 mg, 247 μmol), Pd2dba3 (11 mg, 12 μmol), X-Phos (12 mg, 25 μmol), (E)-3,3-dimethylbut-1-enylboronic acid (63 mg, 493 μmol) and potassium phosphate (157 mg, 740 μmol). THF (2 mL) was added and the mixture was heated at 120° C. in microwave reactor for 2 hrs. The mixture was diluted with ethyl acetate and filtered through plug of Celite. After removal of the solvents the residue was purified by flash chromatography on silica gel (12 g Redi-Sep column, 20-100% DCM/MeOH/NH4OH 90:10:1 in DCM) to give 2′-(3,3-dimethylbut-1-enyl)-7′-(pyrimidin-5-yl)-5H-spiro[oxazole-4,9′-xanthen]-2-amine (65 mg, 64% yield). This product was hydrogenated at 1 atm of H2 in MeOH/EtOAc mixture using 10% palladium on carbon (53 mg, 49 μmol) for 60 hrs. The reaction mixture was filtered and concentrated in vacuo and was further purified by reverse-phase HPLC (10-90% CH3CN/H2O with 0.1% TFA). The fractions containing product were combined and dried overnight under high vacuum to give 2′-(3,3-dimethylbutyl)-7′-(pyrimidin-5-yl)-5H-spiro[oxazole-4,9′-xanthen]-2-amine as its TFA salt. prepared in a manner similar to Example 39 filtered through plug of Celite After removal of the solvents the residue was purified by flash chromatography on silica gel (12 g Redi-Sep column, 20-100% DCM/MeOH/NH4OH 90:10:1 in DCM)

Conditions: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A microwave vial was charged with (rac)-2′-Chloro-7′-(5-pyrimidinyl)spiro[1,3-oxazole-4,9′-xanthen]-2-amine (90 mg, 247 μmol), Pd2 dba3 (11 mg, 12 μmol), X-Phos (12 mg, 25 μmol), (E)-3,3-dimethylbut-1-enylboronic acid (63 mg, 493 μmol) and potassium phosphate (157 mg, 740 μmol). THF (2 mL) was added and the mixture was heated at 120° C. in microwave reactor for 2 hrs. The mixture was diluted with ethyl acetate and filtered through plug of Celite. After removal of the solvents the residue was purified by flash chromatography on silica gel (12 g Redi-Sep column, 20-100% DCM/MeOH/NH4OH 90:10:1 in DCM) to give 2′-(3,3-dimethylbut-1-enyl)-7′-(pyrimidin-5-yl)-5H-spiro[oxazole-4,9′-xanthen]-2-amine (65 mg, 64% yield). This product was hydrogenated at 1 atm of H2 in MeOH/EtOAc mixture using 10% palladium on carbon (53 mg, 49 μmol) for 60 hrs. The reaction mixture was filtered and concentrated in vacuo and was further purified by reverse-phase HPLC (10-90% CH3CN/H2O with 0.1% TFA). The fractions containing product were combined and dried overnight under high vacuum to give 2′-(3,3-dimethylbutyl)-7′-(pyrimidin-5-yl)-5H-spiro[oxazole-4,9′-xanthen]-2-amine as its TFA salt. filtered through plug of Celite After removal of the solvents the residue was purified by flash chromatography on silica gel (12 g Redi-Sep column, 20-100% DCM/MeOH/NH4OH 90:10:1 in DCM)