Chemoselective deprotection and deprotection with concomitant reduction of 1,3-dioxolanes, acetals and ketals using nickel boride
作者:Jitender M. Khurana、Kiran Dawra、Purnima Sharma
DOI:10.1039/c4ra15404e
日期:——
An efficient and mild methodology for the reductive deprotection of 1,3-dioxolanes, acetals and ketals to the corresponding aldehydes/ketones and also deprotection with concomitant reduction to the corresponding alcohols has been achieved in quantitative yields using nickel boride generated in situ from nickel chloride and sodium borohydride in methanol. The reactions are chemoselective as halo, alkoxy
Hydrophobic, low-loading and alkylated polystyrene-supported sulfonic acid for several organic reactions in water: remarkable effects of both the polymer structures and loading levels of sulfonic acidsElectronic supplementary information (ESI) available: Experimental details. See http://www.rsc.org/suppdata/ob/b3/b305622h/
作者:Shinya Iimura、Kei Manabe、Sh? Kobayashi
DOI:10.1039/b305622h
日期:——
A hydrophobic, low-loading and alkylated polystyrene-supported sulfonic acid (LL–ALPS–SO3H) has been developed for several organic reactions such as the hydrolysis of thioesters, the deprotection of acetals and an acetonide, and the hydration of an epoxide and an alkyne in pure water on the basis of remarkable effects of both the polymer structures and loading levels of the sulfonic acid catalysts.
Chloral Hydrate as a Water Carrier for the Efficient Deprotection of Acetals, Dithioacetals, and Tetrahydropyranyl Ethers in Organic Solvents
作者:Sosale Chandrasekhar、Annadka Shrinidhi
DOI:10.1080/00397911.2013.876652
日期:2014.7.3
Abstract The efficientdeprotection of several acetals, dithioacetals, and tetrahydropyranyl (THP) ethers under ambient conditions, using chloral hydrate in hexane, is described. Excellent yields were realized for a wide range of both aliphatic and aromatic substrates. The method is characterized by mild conditions (room temperatures or below), simple workup, and the ready availability of chloral hydrate
Magtrieve™: a new agent for the deprotection/oxidation of acetals and ketals under neutral conditions
作者:Kwang-Youn Ko、Sung-Tae Park
DOI:10.1016/s0040-4039(99)01188-0
日期:1999.8
MagtrieveTM can be used for the deprotection of acetals and ketals or for the direct oxidation to carboxylic acids under neutral conditions.
Magtrieve TM可用于缩醛和缩酮的脱保护或在中性条件下直接氧化为羧酸。
Distannoxane-catalyzed acetilization of carbonyls
作者:Junzo Otera、Nobuhisa Dan-oh、Hitosi Nozaki
DOI:10.1016/s0040-4020(01)92233-1
日期:1992.2
1,3-Disubstituted tetrabutyldistannoxanes catalyze acetilization of carbonyl compounds undermildconditions. Thorough investigations of factors influencing this reaction are given. A variety of synthetically useful carbonyl compounds are efficiently converted to acetals. In particular, acetilization of cyclic α,β-unsaturated ketones is readily achieved which have met with only limited success so far