Butyldi-1-adamantylphosphine

Physical properties

Butyldi-1-adamantylphosphine is a white to yellow solid with a melting point of 100°C and an estimated boiling point of 449.6±12.0°C. Store at room temperature, it is air sensitive.

The Uses of Butyldi-1-adamantylphosphine

suzuki reaction

The Uses of Butyldi-1-adamantylphosphine

CataCXium A is a catalyst. CataCXium A is an electron-rich phosphine ligand used for palladium catalyzed cross-coupling reactions like Heck and Suzuki coupling reactions.

The Uses of Butyldi-1-adamantylphosphine

cataCXium A or di-adamantylalkylphosphine is a bulky and electron-rich phosphine ligand that is highly effective for palladium catalyzed cross-coupling reactions such as Heck and Suzuki coupling, Buchwald-Hartwig amination of aryl chlorides, and α-arylation reactions of ketones.

Other applications:

• palladium-catalyzed carbonylation of aryl and heteroaryl halides
• palladium-catalyzed synthesis of (hetero)aromatic nitriles
• palladium-catalyzed aminocarbonylation of aryl halides

General Description

Sold in collaboration with Solvias AG

Synthesis

Phosphonium salt (2.2 mmol) was added to a cooled solution (- 78 ??C) of Et3N (4.44 g, 44 mmol) in di-n-butyl ether (20 mL). The reaction mixture was stirred at -78 ??C for 5 h and then allowed to warm gradually to r.t. The solvent was removed under vacuum and the residue was dissolved in degassed EtOH (5 mL). After stirring for 15 min, the solid was filtered off and dried to yield the desired phosphine, which can be further purified by crystallization from EtOH. Butyldi-1-adamantylphosphine, yield 90%.
31P NMR (C6D6)|?: 24.9. Mp 108-110??C. IR (KBr): 3425 (m, br), 2952 (s), 2847 (s), 2847 (s), 2675 (w), 1446 cm-1 (m). 1H NMR (250 MHz, C6D6): |? = 0.96 (3 H, t, 3JH, H = 7.3 Hz, CH3), 1.35-2.03 (36 H, m, adamantyl-30H, butyl-6H). 13C NMR (62 MHz, C6D6): |? = 41.3 (d, 2JC,P = 11.3 Hz, C-2), 37.4 (C-4), 36.1 (d, 1JC,P = 23.5 Hz, C-1), 33.9 (d, 1JC,P = 26.2 Hz, butyl-|á -CH2), 29.1 (d, 3JC,P = 7.6 Hz, C-3), 24.9 (d, 2JC,P = 13.1 Hz, butyl-|? -CH2), 17.1 (d, 3JC,P = 21.6 Hz, butyl-|? -CH2), 14.3 (butyl-CH3). MS (EI, 70 eV): m/z (%) = 358 (M+, 60), 135 (Ad+, 100).