ジ(1‐アダマンチル)‐N‐ブチルホスフィン

物理的性質

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.

使用

suzuki reaction

一般的な説明

Sold in collaboration with Solvias AG

合成

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).