Regio- and Diastereoselective Catalytic Epoxidation of Acyclic Allylic Alcohols with Methyltrioxorhenium: A Mechanistic Comparison with Metal (Peroxy and Peroxo Complexes) and Nonmetal (Peracids and Dioxirane) Oxidants
作者:Waldemar Adam、Catherine M. Mitchell、Chantu R. Saha-Möller
DOI:10.1021/jo9902289
日期:1999.5.1
Geraniol and its 1-methyl derivative (regiochemical probes) and a set of methyl- and tert-butyl-substituted chiral allylicalcohols (stereochemical probes) have been used to elucidate the mechanism of the MTO-catalyzed epoxidation of allylicalcohols. The regiochemical probes are preferentially epoxidized at the unfunctionalized double bond by these MTO-based oxidants, which establishes that MTO/UHP
A Comparison of Intrazeolite and Solution Singlet Oxygen Ene Reactions of Allylic Alcohols
作者:Edward L. Clennan、Dong Zhang、Jamie Singleton
DOI:10.1562/2006-01-09-ra-768
日期:2006.9
of four allylic alcohols and for comparison an allylic ether have been examined both in solution and in zeolite Y. Brønsted acid sites in the zeolite were shown to inducedecomposition of several of the allylic alcohols. Treatment of the zeolites with pyridine removed these acid sites and allowed intrazeolite reactions of the allylic alcohols without interference from decomposition. Control reactions
摘要 四种烯丙醇和烯丙醚的单线态氧烯反应已在溶液和 Y 沸石中进行了检测。沸石中的布朗斯台德酸位被证明会诱导几种烯丙醇的分解。用吡啶处理沸石去除了这些酸性位点并允许烯丙醇在沸石内反应而不受分解干扰。与对分解呈惰性的烯丙醇的控制反应提供证据,证明沸石迷宫中吡啶的存在不会影响产品组成。
Enantioselective C−C Bond Formation by Rhodium-Catalyzed Tandem Ylide Formation/[2,3]-Sigmatropic Rearrangement between Donor/Acceptor Carbenoids and Allylic Alcohols
作者:Zhanjie Li、Huw M. L. Davies
DOI:10.1021/ja9075293
日期:2010.1.13
The rhodium-catalyzed reaction of racemic allyl alcohols with methyl phenyldiazoacetate or methyl styryldiazoacetate results in a two-step process, an initial oxonium ylide formation followed by a [2,3]-sigmatropic rearrangement. This process competes favorably with the more conventional O-H insertion chemistry as long as donor/acceptor carbenoids and highly substituted allyl alcohols are used as substrates
Hydroxy-directed regio-diastereoselective ene reaction of singlet oxygen with chiral allylic alcohols
作者:Waldemar Adam、Bernd Nestler
DOI:10.1021/ja00065a013
日期:1993.6
The photooxygenation of chiral allylic alcohols 1a, (Z)-1f-k, ethers 1b-d, and acetate 1e gave the corresponding hydroperoxy homoallylic alcohols and derivatives 2 through the enereaction with singletoxygen. While the reaction of the acetate 1e proceeded erythro-diastereoselectively as a result of the classical cis effect, for the allylic alcohols 1a and (Z)-1f-k, in which an alkyl group is located
手性烯丙醇 1a、(Z)-1f-k、醚 1b-d 和乙酸酯 1e 的光氧化反应通过与单线态氧的烯反应得到相应的氢过氧高烯丙醇和衍生物 2。由于经典的顺式效应,乙酸酯 1e 的反应以赤型非对映选择性进行,对于烯丙醇 1a 和 (Z)-1f-k,其中烷基位于带羟基的取代基的顺式,高观察到threo选择性。这一发现可以通过立体中心的亲核羟基官能团与进入的亲电子单线态氧亲烯体的配位来解释
Catalytic and efficient cleavage of allylic and tertiary benzylic ethers and esters with Ce(IV)
作者:Nasser Iranpoor、Enayatolah Mottaghinejad
DOI:10.1016/s0040-4020(01)85253-4
日期:1994.1
The reaction of cerium(IV) as cericammoniumnitrate (CAN) with a variety of allylic and tertiary benzylic ethers and esters has been examined in different alcohols and acetic acid under catalytic and mild conditions. Experiments have been conducted to elucidate the scope of this ether-to-ether, ether-to-acetate and acetate-to-ether transformations.