New Strategies for Protecting Group Chemistry: Synthesis, Reactivity, and Indirect Oxidative Cleavage of <i>para</i>-Siletanylbenzyl Ethers
作者:Sami F. Tlais、Hubert Lam、Sarah E. House、Gregory B. Dudley
DOI:10.1021/jo802229p
日期:2009.3.6
of arylmethyl etherprotectinggroups. The para-siletanylbenzyl (PSB) ether is electronically similar to the benzyl ether. Cleavage of the PSB ether is accomplished under mild conditions—involving alkaline hydrogen peroxide—that are unique among cleavage protocols for arylmethyl ethers. Furthermore, the PSB group affords the user new flexibility in the implementation of protectinggroup strategies that
Cosolvent-Promoted O-Benzylation with Silver(I) Oxide: Synthesis of 1′-Benzylated Sucrose Derivatives, Mechanistic Studies, and Scope Investigation
作者:Lei Wang、Yasuyuki Hashidoko、Makoto Hashimoto
DOI:10.1021/acs.joc.6b00144
日期:2016.6.3
simple, mild, and highly effective, and numerous 1′-benzylated sucrosederivatives were prepared including a photoreactive (trifluoromethyl)phenyldiazirine-based sucrose. The mechanisms of benzylation with primary and secondary benzyl bromides were also elaborated. Furthermore, the application scope with alcohols, glucose, and ribose derivatives was investigated.
An Efficient and Convenient Method for the Direct Conversion of Alkyl Silyl Ethers into the Corresponding Alkyl Ethers Catalyzed by Iron(III) Chloride
作者:Takeshi Oriyama、Katsuyuki Iwanami、Kentaro Yano
DOI:10.1055/s-2005-872120
日期:——
Various alcohol silyl ethers were readily and efficiently transformed into the corresponding alkyl ethers in high yields by the use of aldehydes combined with triethylsilane in the presence of a catalytic amount of iron(III) chloride.
Iron(III) Chloride-catalyzed Reductive Etherification of Carbonyl Compounds with Alcohols
作者:Katsuyuki Iwanami、Kentaro Yano、Takeshi Oriyama
DOI:10.1246/cl.2007.38
日期:2007.1
A facile reductive etherification of carbonylcompounds can be performed by the reaction with alcohols and triethylsilane catalyzed by iron(III) chloride. The corresponding alkyl ethers are obtaine...
Visible-Light-Promoted Conversion of Alkyl Benzyl Ether to Alkyl Ester or Alcohol via O-α-sp<sup>3</sup> C–H Cleavage
作者:Ping Lu、Tianyuan Hou、Xiangyong Gu、Pixu Li
DOI:10.1021/acs.orglett.5b00663
日期:2015.4.17
A mild and high-yielding visible-light-promoted conversion of alkylbenzylethers to the alkyl esters or alkyl alcohols was developed. Mechanistic studies provided evidence for a radical chain reaction involving the homolytic cleavage of O-α-sp3 C–H bonds in the substrate as one of the propagation steps. We propose that α-bromoethers are key intermediates in the transformation.