Trichloroisocyanuric Acid, as an Industrial Chemical, Promotes Transthioacetalization of Diacetals of 2,2-Bis (Hydroxymethyl)-1,3-propanediol and Cleavage of Thioacetals
Trichloroisocyanuric acid has been used as a mild, efficient, and new catalyst for transthioacetalization of diacetals of 2,2-bis (hydroxymethyl)-1,3-propanediol in CH 2 Cl 2 at room temperature. A clean, easy, and general method for efficientdeprotection of thioacetals to their corresponding carbonyl compounds using trichloroisocyanuric acid/silica gel and water system also is described.
Cleavage of 1,3-Dithianes via Acid-Catalyzed Hydrolysis of the Corresponding 1,3-Dithianemonooxides
作者:Karsten Krohn、Stephan Cludius-Brandt
DOI:10.1055/s-2008-1067164
日期:2008.8
The hydrolysis of 1,3-dithianes to their parent carbonyl compounds via their corresponding monosulfoxides was systemati- cally investigated. The oxidation of the 1,3-dithianes was carried out in high yields using tert-butyl hydroperoxide. Acid-catalyzedhydrolysis of the monosulfoxides to the carbonyl compounds was then performed in excellent yields. The cleavage reactions were monitored by gas chromatography
An exceptionally simple and convenlent method for dethloacetalization
作者:Goverdhan Mehta、R. Uma
DOI:10.1016/0040-4039(96)00146-3
日期:1996.3
Thioacetals derived fromaldehydes and ketones can be unmasked to the corresponding carbonyl compounds in high yield on exposure to a solution of ‘oxides of nitrogen’ in dichloromethane.
Visible-light mediated facile dithiane deprotection under metal free conditions
作者:Pankaj D. Dharpure、Anindita Bhowmick、Prakash K. Warghude、Ramakrishna G. Bhat
DOI:10.1016/j.tetlet.2019.151407
日期:2020.1
Visible light mediatedfacile and selective dithiane deprotection under metal free conditions is developed. Eosin Y (1 mol%) proved to be an effective catalyst for the dithiane deprotection under the ambient photoredox conditions. The standard household compact fluorescent light source (CFL bulb) proved to be effective under open-air conditions in aqueous acetonitrile at room temperature. The protocol
1-Benzenesulfinyl Piperidine
(BSP)/Triflic Anhydride: An Effective Combination for the
Hydrolysis of Dithioacetals
作者:David Crich、John Picione
DOI:10.1055/s-2003-40328
日期:——
The combination of 1-benzenesulfinyl piperidine and triflic anhydride, in conjunction with an aqueous workup, hydrolyses a broad range of dithioacetals to the corresponding carbonyl compounds under very mild, non-oxidative conditions.