Reacción #1265357

Ecuación de reacción

3,5-bis(3′,5′-di-tert-butylstyryl)benzaldehyde

sodium borohydride

→

3,5-bis(3′,5′-di-tert-butylstyryl)benzyl alcohol

Rendimiento 87.0%

Disolventes

tetrahydrofuran

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturawas heated
2. 2
   Temperaturaat reflux for 110 min
3. 3
   OtroThe solvent was then completely removed
4. 4
   workup.ADDITIONlight petroleum (30-40) and aqueous hydrochloric acid (3 M, 30 cm3) were added
5. 5
   FiltraciónThe white precipitate was then filtered
6. 6
   Otrodried under vacuum

Procedimiento

A mixture of 3,5-bis(3′,5′-di-tert-butylstyryl)benzaldehyde (3.00 g, 6.61 mmol) and sodium borohydride (840 mg, 22.2 mmol) in tetrahydrofuran (150 cm3) was heated at reflux for 110 min. The solvent was then completely removed and light petroleum (30-40) and aqueous hydrochloric acid (3 M, 30 cm3) were added and stirred until effervescence had ceased. The white precipitate was then filtered and dried under vacuum to give 3,5-bis(3′,5′-di-tert-butylstyryl)benzyl alcohol (2.63 g, 87%). A sample for analysis was recrystallised from a dichloromethane-light petroleum (60-80) mixture, mp 226-228° C. (Found: C, 87.28; H, 9.47. C39H52O requires C, 87.26; H, 9.76%); νmax(CHCl3)/cm−1 3608 w (OH), 1596 (C═C) and 964 (C═C—H trans); λmax(CH2Cl2)/nm (logε) 230 (4.42), 307 (4.80), 312 (4.80), 315 (4.80) and 330 sh (4.66); δH(500 MHz, CDCl3) 1.41 (36 H, s, t-Bu), 1.81 (1 H, t, J 6, OH), 4.79 (2 H, d, J 6, CH2), 7.16 and 7.27 (4H, d, J 16, 7′,8′-H), 7.40 (2 H, dd, J 1.5, 4′-H), 7.43(4 H, d, J 1.5, 2′,6′-H), 7.49 (2 H, s, 2,6-H) and 7.66 (1 H, s, 4-H); m/z (APCI+) 519 ((M-OH)+, 100%).

Fuente