A mild palladium(II) catalyzed desilylation of phenolic t-butyldimethylsilyl ethers
作者:Noel S Wilson、Brian A Keay
DOI:10.1016/0040-4039(95)02120-5
日期:1996.1
A variety of phenolict-butyldimethylsilylethers are easily removed in good to excellent yields by treatment with 5 mol % PdCl2(CH3CN)2 in refluxing acetone containing 5 equivalents of water.
Abstract We present an effective three-step chromatography-free sequence for the preparation of apical monohydroxy derivatives of diamantane, triamantane, and [121]tetramantane from the corresponding bis-apical diols utilizing tert-butyldimethylsilyl chloride as the monosilylating agent. The procedure was successfully applied to the monoprotection of several other aliphatic and aromatic diols. Additionally
The SuFEx‐based polycondensation between bisalkylsulfonyl fluorides (AA monomers) and bisphenol bis(t‐butyldimethylsilyl) ethers (BB monomers) using [Ph3P=N−PPh3]+[HF2]− as the catalyst is described. The AA monomers were prepared via the highly reliable Michael addition of ethenesulfonyl fluoride and amines/anilines while the BB monomers were obtained from silylation of bisphenols by t‐butyldimethylsilyl
TBDMS (t-BuMe2Si, t-butyldimethylsilyl) ethers of a variety of phenols have been deprotected with KHF2 in MeOH, at room temperature. Carboxylic ester and labile phenolic acetate were unaffected under these conditions. In competition reactions between TBDMS ethers of a phenol and two primary benzylic alcohols, the phenolicether underwent cleavage whereas the alcohol ethers remained intact. From a substrate
A new dendrimer series: synthesis, free radical scavenging and protein binding studies
作者:Dhaval Makawana、Man Singh
DOI:10.1039/d0ra04102e
日期:——
trichloride/trimesoyl chloride (TMC) core, are reported. T0 does not have any replaceable H+ on its terminal phenyl group, acting as a branch. T1 has one phenolic –OH at the para position and T2 has two phenolic –OH groups at the 3 and 5 positions of each terminal phenyl group. During synthesis, these –OH groups at the terminal phenyl groups were protected through tert-butyldimethylsilyl chloride (TBDMSCl) assisted