Selective deprotection of tetrahydropyranyl ethers catalysed by β-cyclodextrin in water
The hydrolysis of tetrahydropyranyl ethers to alcohols catalysed by β-cyclodextrin proceeds in water under neutral conditions.
Arjun Reddy,Rajender Reddy,Bhanumathi,Rama Rao
p. 359 - 360
(2007/10/03)
A novel, simple and rapid regeneration of alcohols from their allylic ethers using NaCNBH3/TMSCl
A Novel, Simple and efficient method for the regeneration of alcohols from their allylic ethers using NaCNBH3/TMSCl is described.
Venkat Rao,Subbash Reddy,Hari Mohan,Iyengar
p. 3565 - 3568
(2007/10/03)
Practical palladium-mediated deprotective method of allyloxycarbonyl in aqueous media
The Allyloxycarbonyl (Alloc) moiety can be removed smoothly and selectively in good yield (73-100%) from allylic esters, carbamates and carbonates by aqueous Pd (O) catalysed allyl transfer to diethylamine in aqueous media employing a water soluble phosphine. The allyl scavenger as well as by product allyl diethylamine are volatile and easily removed in vacuo. In a two phase system an increased selectivity is seen. The method has been successfully used for deprotection of a wide range of secondary amines or base sensitive derivatives and the catalyst is efficiently recycled.
Genet, Jean Pierre,Blart, Errol,Savignac, Monique,Lemeune, Stephane,Lemaire-Audoire, Sandrine,Paris, Jean-Marc,Bernard, Jean-Marie