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. 2004 Aug 10;101(33):12024–12029. doi: 10.1073/pnas.0401925101

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Scheme 4. — (i) TBSO(CH₂)₃SO₂-2Ph-2H-tetrazole 28, potassium hexamethyldisilazane, 77% yield; (ii) tetrabutylammonium fluoride, THF, 84% yield; (iii) N-chlorosuccinimide, PPh₃, Cl₂CH₂, 95% yield; (iv) iBu₂AlH, Cl₂CH₂, 80% yield; (v) MnO₂, Cl₂CH₂, 86–79% yield; (vi) HCCMgBr, THF, 62% yield; and (vii) NaI, MeCOEt, 82% yield.

Inline graphic — (i) TBSO(CH₂)₃SO₂-2Ph-2H-tetrazole 28, potassium hexamethyldisilazane, 77% yield; (ii) tetrabutylammonium fluoride, THF, 84% yield; (iii) N-chlorosuccinimide, PPh₃, Cl₂CH₂, 95% yield; (iv) iBu₂AlH, Cl₂CH₂, 80% yield; (v) MnO₂, Cl₂CH₂, 86–79% yield; (vi) HCCMgBr, THF, 62% yield; and (vii) NaI, MeCOEt, 82% yield.