반응 #6677

반응 방정식

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

sodium borohydride

→

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

수율 87.0%

용매

tetrahydrofuran

반응 조건

후처리

1. 1
   온도was heated
2. 2
   온도at reflux for 110 min
3. 3
   기타The solvent was then completely removed
4. 4
   workup.ADDITIONlight petroleum (30–40) and aqueous hydrochloric acid (3 M, 30 cm3) were added
5. 5
   여과The white precipitate was then filtered
6. 6
   기타dried under vacuum

실험 절차

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%); vmax(CHCl3)/cm−1 3608w (OH), 1596 (C═C) and 964 (C═C—H trans); λmax(CH2Cl2)/nm (log ε) 230 (4.42), 307 (4.80), 312 (4.80), 315 (4.80) and 330sh (4.66); δH(500 MHz, CDCl3) 1.41 (36H, s, t-Bu), 1.81 (1H, t, J 6, OH), 4.79 (2H, d, J 6, CH2), 7.16 and 7.27 (4H, d, J 16, 7′, 8′-H), 7.40 (2H, dd, J 1.5, 4′-H), 7.43 (4H, d, J 1.5, 2′, 6′-H), 7.49 (2H, s, 2, 6-H) and 7.66 (1H, s, 4-H); m/z (APCI+) 519 ((M—OH)+, 100%).

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