Synlett 2013; 24(1): 102-104
DOI: 10.1055/s-0032-1317711
letter
© Georg Thieme Verlag Stuttgart · New York

Oxidative Rearrangement of Tertiary Propargylic Alcohols

Arantxa Rodríguez*
Department of Chemical & Biological Sciences, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK   Fax: +44(1484)472182   Email: a.r.menendez@hud.ac.uk   Email: w.j.moran@hud.ac.uk
,
Wesley J. Moran*
Department of Chemical & Biological Sciences, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK   Fax: +44(1484)472182   Email: a.r.menendez@hud.ac.uk   Email: w.j.moran@hud.ac.uk
› Author Affiliations
Further Information

Publication History

Received: 09 October 2012

Accepted after revision: 07 November 2012

Publication Date:
04 December 2012 (online)


Abstract

An oxidative rearrangement of tertiary alcohols mediated by m-CPBA is described that generates tetrasubstituted alkenes with a carboxylic acid substituent. The mechanism of the reaction is proposed to proceed through epoxidation of the alkyne to form an oxirene that undergoes a 1,2-aryl shift.

Supporting Information

 
  • References and Notes

  • 1 McDonald RN, Schwab PA. J. Am. Chem. Soc. 1964; 86: 4866
  • 2 Stille JK, Whitehurst DD. J. Am. Chem. Soc. 1964; 86: 4871
    • 3a Ortiz de Montellano PR, Kunze KL. J. Am. Chem. Soc. 1980; 102: 7373
    • 3b Crandall JK, Conover WW. II. J. Org. Chem. 1978; 43: 1323
    • 3c Csizmadia IG, Font J, Strausz OP. J. Am. Chem. Soc. 1968; 90: 7360
  • 4 For a review, see: Bauer EB. Synthesis 2012; 44: 1131

    • For example, see:
    • 5a Angara GJ, Bovonsombat P, McNelis E. Tetrahedron Lett. 1992; 33: 2285
    • 5b Bovonsombat P, McNelis E. Tetrahedron 1993; 49: 1525
    • 5c Chen J.-M, Huang X. Synthesis 2004; 2459
    • 5d Bovonsombat P, McNelis E. Synth. Commun. 1995; 25: 1223
    • 5e Djuardi E, Bovonsombat P, McNelis E. Tetrahedron 1994; 50: 11793
    • 5f Bovonsombat P, McNelis E. Tetrahedron Lett. 1993; 34: 4277
    • 5g Bovonsombat P, McNelis E. Tetrahedron Lett. 1993; 34: 8205
  • 6 For a review of the Meyer–Schuster rearrangement, see: Engel DA, Dudley GB. Org. Biomol. Chem. 2009; 7: 4149
  • 7 Moran WJ, Rodríguez A. Org. Biomol. Chem. 2012; 10: 8590
  • 8 Rodríguez A, Moran WJ. Org. Lett. 2011; 13: 2220
  • 9 Typical Experimental Procedure 1-[(4-tert-Butylphenyl)ethynyl]cyclopentanol (1a, 50 mg, 0.21 mmol), m-CPBA (54 mg, 0.31 mmol), and trichloroacetic acid (51 mg, 0.31 mmol) were dissolved in MeCN (1 mL) at r.t. under a nitrogen atmosphere. The mixture was stirred overnight until solid precipitation was evident (typically less than 15 h). The reaction mixture was quenched with sat. aq Na2S2O3 solution and extracted with CH2Cl2. The organic layer was washed with sat. aq NaHCO3 solution, dried over MgSO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (silica gel; 20:1 PE–EtOAc) to afford 2-(4-tert-butylphenyl)-2-cyclopentylideneacetic acid (3a) as a pale yellow solid (22 mg, 40%); mp 193–195 °C. IR (neat): 1252 (s), 1284 (s), 1618 (m), 1674 (s), 2955 (w) cm–1. 1H NMR (400 MHz, CDCl3): δ = 1.32 (9 H, s), 1.58 (2 H, quin, J = 6.8 Hz), 1.76 (2 H, quin, J = 6.9 Hz), 2.23 (2 H, t, J = 7.2 Hz), 2.89 (2 H, t, J = 7.3 Hz), 7.10 (2 H, d, J = 8.4 Hz), 7.35 (2 H, d, J = 8.4 Hz), 11.35 (1 H, br). 13C NMR (100 MHz, CDCl3): δ = 26.1, 27.1, 31.7 (3 C), 34.8, 34.9, 36.5, 125.1, 125.4 (2 C), 129.2 (2 C), 135.9, 149.9, 168.1, 173.0. MS: m/z = 281.2 [M + 23]. HRMS: m/z calcd for C17H22NaO2: 281.1512; found: 281.1518.
  • 10 Martín-Vaca B, Rudler H. J. Chem. Soc., Perkin Trans. 1 1997; 3119
  • 11 Zhang H, Fu X, Chen J, Wang E, Liu Y, Li Y. J. Org. Chem. 2009; 74: 9351
  • 12 For a review, see: Hoveyda AH, Evans DA, Fu GC. Chem. Rev. 1993; 93: 1307