全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Gen Onodera , Ryosuke Hachisuka , Tomomi Noguchi ...
来源:[J].Tetrahedron Letters(IF 2.397), 2014, Vol.55 (2), pp.310-313Elsevier
摘要:Abstract(#br)The stereoselective synthesis of either ( E )- or ( Z )-silyl enol ether from the same acyclic α,β-unsaturated ketone is reported. Highly ( Z )-selective conditions were the use of [Rh(cod) 2 ]BF 4 /DPPE at room temperature with no solvent, whereas ( E )-selecti...
作者:Indrek Reile , Anne Paju , Tõnis Kanger ...
来源:[J].Tetrahedron Letters(IF 2.397), 2012, Vol.53 (12), pp.1476-1478Elsevier
摘要:Abstract(#br)Cyclopentane-1,2-dione bis( tert -butyldimethylsilyl) enol ether readily undergoes organocatalytic reactions with α,β-unsaturated aldehydes resulting in Mukaiyama–Michael adducts which, after reduction of the aldehyde group and deprotection result in chiral 1...
作者:Aoi Kimishima , Tomoyasu Hirose , Akihiro Sugawara ...
来源:[J].Tetrahedron Letters(IF 2.397), 2012, Vol.53 (23), pp.2813-2816Elsevier
摘要:... Construction of a versatile enol ether moiety was achieved by Stille cross coupling via hydrostanylation of the ethynyl ether, and a maleic anhydride moiety was derived from the furan constitution by the oxidation after the macrolactonization at a late-stage.
作者:Michelle Tran-Dubé , Neal Sach , Sacha Ninkovic ...
来源:[J].Tetrahedron Letters(IF 2.397), 2012, Vol.53 (33), pp.4372-4375Elsevier
摘要:Abstract(#br)The synthesis of 3-(6-chloropyrazin-2-yl)pyrazolo[1,5- a ]pyridine from an enol ether and 4-substituted 1-aminopyridinim iodides via a 3+2 cycloaddition is presented. A high throughput reaction screen was used to optimize the yield of the cycloaddition. This protocol...
作者:James V. Crivello , Marco Sangermano
来源:[J].Journal of Macromolecular Science, Part A(IF 0.807), 2001, Vol.38 (5-6), pp.487-502Taylor & Francis
摘要:The synthesis of multifunctional oligomers containing cationically polymerizable enol ether groups at the terminal positions and along the backbone was achieved through the use of simple, straightforward reaction chemistry. This involves first, the etherification of 2-butene-...
作者:Shiharu Hiraoka , Shinji Harada , Atsushi Nishida
来源:[J].Tetrahedron Letters(IF 2.397), 2011, Vol.52 (24), pp.3079-3082Elsevier
摘要:Abstract(#br)Although Ito–Saegusa oxidation gives defined α,β-unsaturated ketones from silyl enol ether of ketones controlled by the position of the sp 2 carbon of the silyl enol ether, the formation of a regioisomeric product that was oxidized abnormally was observed. The ...
作者:Jin-Ming Wu , Ying Li
来源:[J].Tetrahedron Letters(IF 2.397), 2001, Vol.42 (38), pp.6737-6739Elsevier
摘要:Abstract(#br)The photooxygenation product of a cyclic enol ether conjugated with an o -phenylene ring is a novel epoxy compound instead of a 1,2,4-trioxane analogue. The structure of the compound was elucidated by X-ray analysis.
作者:Hiromi Uchiro , Ryo Kato , Yoshikazu Sakuma ...
来源:[J].Tetrahedron Letters(IF 2.397), 2011, Vol.52 (47), pp.6242-6245Elsevier
摘要:... The C-ring was constructed by intramolecular cyclization reaction between a chiral epoxide and silyl enol ether, and the dienophile moiety was introduced concurrently. In addition, the AB-rings were stereoselectively constructed using novel sequential retro Diels–Alder (...
作者:Junfang Gong , Eric Bonfand , Eric Brown ...
来源:[J].Tetrahedron Letters(IF 2.397), 2003, Vol.44 (10), pp.2141-2144Elsevier
摘要:... The key step that involved a trisubstituted chiral enol ether derived from ( R )-mandelic acid as the dienophile promoted the creation of three stereogenic centers with a remarkable and unprecedented endo and facial stereocontrol. The hydrogenation of the heteroadduct 2 ...
作者:Paul Barraclough , Caroline A. Spray , Douglas W. Young
来源:[J].Tetrahedron Letters(IF 2.397), 2005, Vol.46 (27), pp.4653-4655Elsevier
摘要:... The key step of the route to the latter compounds involves highly stereoselective hydrolysis of the silyl enol ethers 3 and 3a , respectively, with protonation (deuteriation) from the re -face of the silyl enol ether.

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