Deprotection of Oximes using Iodosobenzene in the Presence of β‐Cyclodextrin in Water

A mild and efficient method for the regeneration of carbonyl compounds from oximes at room temperature in impressive yields has been developed using iodosobenzene/KBr in the presence of β‐cyclodextrin in water.     

Catalytic Oxidation of Alcohols to Corresponding Aldehydes or Ketones with TEMPO-Mediated Iodosobenzene in Water in the Presence of a Surfactant

An efficient, facile, and rapid oxidation of alcohols to the corresponding aldehydes or ketones with a stoichiometric amount of iodosobenzene (PhIO) in the presence of catalytic amounts of 2,2,6,6-tetramethyl-1-piperidinyloxyl free radical (TEMPO), KBr, and a surfactant, such as SDS (sodium dodecylsulfate), was reported. The oxidation proceeded in water at room temperature to afford aldehydes or ketones in excellent yields and high selectivity without overoxidation to carboxylic acids. Selective oxidation of primary alcohols in the presence of secondary alcohols was also achieved with the catalytic system of PhIO/TEMPO/KBr/SDS. A possible mechanism for the oxidation was supposed.     

金属羰基化合物氧原子转移反应——在PhIO存在下Cr(CO)6的CO取代反应动力学与机理的研究

亚碘酰苯作为氧原子转移试剂越来越引起人们的注意。Patton曾在PhIO存在的条件下合成了〔η~5-C_5(CH_3)_5ReCONOPPh_3〕BF_4,指出PhIO可能氧化消除了一个羰基。但有关PhIO与金属羰基化合物反应的动力学研究未见报道。为了解其反应性质,我们对在PhIO存在下Cr(CO)_6的取代反应进行了研究。     

Use of Iodosobenzene in Combination with Vilsmeier–Haack Reagent in Carbon–Carbon Bond Cleavage of Dehydroacetic Acid and Its Analogue

The reaction of dehydroacetic acid with iodosobenzene in combination with Vilsmeier–Haack reagent offers a new and convenient method for C‐C bond cleavage with the formation of 3‐chloro‐4‐hydroxy‐6‐methyl‐2H‐pyran‐2‐one.