1.1: triethylamine; DMAP / CH2Cl2 / 20 h / 20 °C 2.1: water; DDQ / CH2Cl2 / 1 h / 20 °C 3.1: 2-iodoxybenzoic acid / tetrahydrofuran; dimethylsulfoxide / 0.5 h / 20 °C 4.1: potassium tert-butoxide / tetrahydrofuran / 0.08 h / -78 °C 4.2: tetrahydrofuran / -78 - 20 °C 5.1: potassium hydroxide / methanol / 3 h / 20 °C View Scheme

1.1: 1H-imidazole / dichloromethane / 0.17 h / 0 °C 1.2: 6 h / 0 - 20 °C 2.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / dichloromethane; water / 2 h / 0 - 20 °C 3.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dimethyl sulfoxide; dichloromethane / 3 h / 20 °C 4.1: (S)-(minus;)-1,1'-bi-2-naphthol; titanium (IV) isopropoxide / dichloromethane / 0.5 h / 20 °C / |Inert atmosphere; |Molecular sieve 4.2: 24 h / -78 - -20 °C / |Inert atmosphere; |Molecular sieve 5.1: 4-(N,N-dimethlyamino)pyridine / 1 h / 0 - 20 °C / |Inert atmosphere 6.1: Grubb's 2nd generation catalyst / dichloromethane 7.1: 0.5 h / 0 - 20 °C View Scheme