Synlett 2009(17): 2765-2768  
DOI: 10.1055/s-0029-1217965
LETTER
© Georg Thieme Verlag Stuttgart ˙ New York

One-Pot Synthesis of 1,2,3-Triols from Allylic Hydroperoxides and a Catalytic Amount of OsO4 in Aqueous Acetone

Cemalettin Alp, Ufuk Atmaca, Murat Çelik, Mehmet Serdar Gültekin*
Faculty of Sciences, Department of Chemistry, Atatürk University, 25240 Erzurum, Turkey
Fax: +90(442)2360948; e-Mail: gultekin@atauni.edu.tr;
Further Information

Publication History

Received 28 May 2009
Publication Date:
09 September 2009 (online)

Abstract

Allylic hydroperoxides were converted into the corresponding triols in the presence of a catalytic amount of OsO4. The present reaction involves regeneration of active osmium species by the hydroperoxide functionality and occurs in a diastereoselective manner to form triols in high yields. A plausible mechanism for the formation of 1,2,3-triols from allylic hydroperoxide is presented.

8

Typical Procedure for the Formation of Triols
Allylic hydroperoxide (10 mmol) was dissolved in a mixture of H2O-acetone (20 mL, 1:9) solution and OsO4 (0.02 mmol, 5 mg) in acetone (5 mL) was added to the stirring solution of hydroperoxide. The mixture was stirred at r.t. at 22-65 h (examples in Table  [¹] ). The reaction was monitored by TLC. The solution was evaporated (2.7˙10 bar, r.t.), and then the crude residue was directly purified by column chromatography on silica gel using EtOAc-hexanes as eluent to give the corresponding triols (Table  [¹] ). rac -2,3-Dimethylbutane 1,2,3-Triol (2a)
¹H NMR (200 MHz, CDCl3): δ = 1.02 (s, 3 H), 1.18 (s, 3 H), 1.21 (s, 3 H), 3.44 (d, J = 11.3 Hz, 1 H), 3.83 (d, J = 11.3, 1 H) ppm. ¹³C NMR (50 MHz, CDCl3): δ = 22.1, 26.6, 27.2, 70.1, 77.5, 77.9 ppm. rac -Cyclopentane-1,2,3-triol (4a) ¹H NMR (200 MHz, CD3OD): δ = 1.39-1.83 (m, 2 H), 1.91-2.18 (m, 2 H), 3.69-3.79 (m, 1 H), 4.01-4.12 (m, 2 H) ppm. ¹³C NMR (50 MHz, CD3OD): δ = 31.5, 31.8, 74.6, 79.2, 82.7 ppm.
rac -Cyclopentane-1,2,3-triyl Triacetate (4b) ¹H NMR (200 MHz, CDCl3): δ = 1.49-1.61 (m, 1 H), 1.74-1.81 (m, 1 H), 2.02 (br s, 9 H, 3 CH3), 2.23-2.44 (m, 2 H), 5.09-5.23 (m, 2 H), 5.28 (m, 1 H) ppm. ¹³C NMR (50 MHz, CDCl3): δ = 22.5, 22.6, 22.8, 28.6, 28.8, 74.1, 77.9, 78.4, 171.8, 171.9, 172.2 ppm. rac -Cyclohexane-1,2,3-triol (6a) ¹H NMR (200 MHz, CD3OD): δ = 1.20-1.87 (m, 6 H), 3.34 (dd, J = 2.7, 8.5 Hz, 1 H), 3.75 (m, 1 H), 4.01 (m, 1 H) ppm. ¹³C NMR (50 MHz, CD3OD): δ = 21.3, 33.5, 34.9, 72.9, 73.1, 79.1 ppm.
rac -Cyclohexane-1,2,3-triyl Triacetate (6b)
¹H NMR (200 MHz, CDCl3): δ = 1.57-1.97 (m, 6 H), 2.01 (s, 3 H), 2.05, (s, 3 H), 2.19, (s, 3 H), 4.90 (dd, J = 3.0, 9.1 Hz, 1 H), 5.05 (m, 1 H), 5.32 (m, 1 H) ppm. ¹³C NMR (50 MHz, CDCl3): δ = 20.3, 22.5, 22.8, 23.9, 29.9, 30.8, 71.9, 72.3, 74.4, 168.1, 171.8, 171.9 ppm.
rac -Cycloheptane-1,2,3-triol (8a): ¹H NMR (200 MHz, CD3OD): δ = 1.45-1.88 (m, 8 H), 3.55 (dd, J = 2.5, 7.1 Hz, 2 H), 3.70 (m, 1 H), 3.96 (m, 1 H) ppm.¹³C NMR (50 MHz, CD3OD): δ = 25.4, 26.3, 33.4, 35.8, 74.6, 75.3, 82.2 ppm.
rac -Cycloheptane-1,2,3-triyl Triacetate (8b): ¹H NMR (200 MHz, CDCl3): δ = 1.42-1.66 (m, 8 H), 2.02 (s, 3 H), 1.99 (s, 3 H), 1.97 (s, 3 H), 4.86 (dd, J = 2.0, 4.2, 1 H), 4.95 (m, 1 H), 5.06 (m, 1 H) ppm. ¹³C NMR (50 MHz, CDCl3): δ = 22.7, 22.8, 22.9, 23.8, 24.0, 29.7, 29.9, 73.9, 74.4, 78.05, 171.8 (2 C), 171.9 ppm.
rac -Cyclooctane-1,2,3-triol (10a): ¹H NMR (200 MHz, CD3OD): δ = 1.55-1.90 (m, 10 H), 3.65 (dd, J = 2.4, 8.5 Hz, 1 H), 3.79 (m, 1 H), 3.96 (m, 1 H) ppm. ¹³C NMR (50 MHz, CD3OD): δ = 26.1, 27.8, 29.9, 34.0, 36.1, 73.8, 74.8, 80.8 ppm.
rac -Cyclooctane-1,2,3-triyl Triacetate (10b): ¹H NMR (200 MHz, CDCl3): δ = 1.45-2.01 (m, 10 H), 1.93 (s, 3 H), 1.96 (s, 3 H), 1.97 (s, 3 H), 4.92-5.23 (m, 3 H) ppm. ¹³C NMR (50 MHz, CDCl3): δ = 22.9, 24.3, 25.6, 26.5, 28.2, 29.9, 30.9, 31.7, 73.4, 75.3, 76.4, 171.8, 172.0, 172.1 ppm.
rac -1,2,3,4-Tetrahydronaphthalene-1,2,3-triol (12a): ¹H NMR (200 MHz, CD3OD): δ = 7.18 (m, 4 H), 2.56-3.09 (m, 2 H), 4.64 (m, 1 H), 4.02 (m, 1 H), 3.61 (1 H) ppm. ¹³C NMR (50 MHz, CD3OD): δ = 38.9, 68.9, 72.8, 76.5, 128.5, 128.9, 129.7, 130.3, 137.3, 138.5 ppm.
rac -2,3,4-Trihydroxy-4-methylcyclohexanone (14a): ¹H NMR (200 MHz, CDCl3): δ = 4.22 (d, J = 5.7 Hz, 1 H), 3.72 (d, J = 5.7 Hz, 1 H), 2.22-1.84 (m, 4 H), 1.27 (s, 3 H) ppm. ¹³C NMR (50 MHz, CDCl3): δ = 28.5, 36.3, 37.4, 74.5, 75.8, 79.9, 209.8 ppm.