A Mild, Highly Efficient, and Chemoselective Deprotection of Trityl Ethers of Carbohydrates and Nucleosides Using Iodine Monobromide¹
作者:K. P. Kartha、Satish Malik
DOI:10.1055/s-0029-1217356
日期:2009.7
Iodine monobromide in dichloromethane-methanol or acetonitrile constitutes an effective reagent for the deprotection of O-trityl and O-dimethoxytrityl ethers of carbohydrates and nucleosides. Acid-labile functionalities (acetals, O-p-methoxybenzyl ethers, etc.) as well as base-labile groups (esters and amides) are stable under these conditions; and the method has been found to be superior to the hitherto known literature methods.
A facile new procedure for the deprotection of allyl ethers under mild conditions
作者:Yun-Jin Hu、Romyr Dominique、Sanjoy Kumar Das、René Roy
DOI:10.1139/v00-073
日期:2000.6.1
instead of cross-metathesis during an olefin metathesis reaction using Grubbs' ruthenium benzylidene catalyst (Cy3P)2RuCl2=CHPh (1), N-allyltritylamine, and N,N-diisopropylethylamine as necessary auxiliary reagents. In the search for a better catalytic system, it has been found that dichlorotris(triphenylphosphine)ruthenium(II), [(C6H5)3P]3RuCl2, (2) was much more efficient for the isomerization of allylic