✦ LIBER ✦

Palladium-catalysed [π2a+π2s] cycloadditions of α-bromoalkyl ketenes to cyclopentadiene

✍ Scribed by Ian J.S Fairlamb; Julia M Dickinson; Ileana M Cristea

Publisher: Elsevier Science
Year: 2000
Tongue: French
Weight: 137 KB
Volume: 41
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)00478-0

No coin nor oath required. For personal study only.

✦ Synopsis

7-Substituted bicyclo[3.2.0]hept-2-en-6-one derivatives were identified as intermediates towards biologically interesting compounds. An improved synthesis of 7-alkyl-7-bromobicyclo[3.2.0]hept-2-en-6-ones by palladiumcatalysed [ π 2a+ π 2s] cycloaddition of α-bromoalkyl ketenes to cyclopentadiene is described. Increased yields and increasing exo alkyl cycloadducts were observed with various palladium catalysts under standard dehydrochlorination conditions.

📜 SIMILAR VOLUMES

ChemInform Abstract: Palladium-Catalyzed

ChemInform Abstract: Palladium-Catalyzed [π2a+π2s] Cycloadditions of α-Bromoalkyl Ketenes to Cyclopentadiene.

✍ Ian J. S. Fairlamb; Julia M. Dickinson; Ileana M. Cristea 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 32 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

ChemInform Abstract: Influence of Pallad

ChemInform Abstract: Influence of Palladium(II) Complexes on the Cycloaddition of α-Bromoalkyl Ketenes to Cyclopentadiene.

✍ Ian J. S. Fairlamb; Julia M. Dickinson; Ileana M. Cristea 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 31 KB 👁 1 views

Thermal addition of xathenethione to all

Thermal addition of xathenethione to allenes: “A Concerted Two Step” (π2s+π2s+π2s)-cycloaddition

✍ J. Kamphuis; R.G. Visser; H.J.T. Bos 📂 Article 📅 1982 🏛 Elsevier Science 🌐 French ⚖ 128 KB

2+2)and (4+2)-cycloadducts are formed by thermal reaction of xanthenethione with allenes. Activation parameters for this "concerted two step" (a2s+s2s+n2S) reaction are presented. Photochemical addition of thiones to allenes have well been studied'. However, thermal addi-

Stereochemistry of cyclobutanone resulte

Stereochemistry of cyclobutanone resulted from cycloadditions of t-butylcyanoketene to bicyclo[2.2.1]heptene derivatives, as evidence for a π2s+π2a reaction mode

✍ Mircea D. Gheorghiu; Constantin Drăghici; Luminita Pârvulescu 📂 Article 📅 1977 🏛 Elsevier Science 🌐 French ⚖ 422 KB

The stereochemistry of 2-t-butyl-2-cyano

The stereochemistry of 2-t-butyl-2-cyano-3-phenylcyclobutanone by complete analysis of its 1H NMR spectrum additional evidence for a 2πs + 2πa cycloaddition of t-butylcyanoketene to styrene

✍ Mircea D. Gheorghiu; Luminita Pârvulescu; Constantin Drâghici; Mihai Elian 📂 Article 📅 1981 🏛 Elsevier Science 🌐 French ⚖ 381 KB

Development of a chemoresistant orthotop

Development of a chemoresistant orthotopic human nonsmall cell lung carcinoma model in nude mice : Analyses of tumor heterogeneity in relation to the immunohistochemical levels of expression of cyclooxygenase-2, ornithine decarboxylase, lung-related resistance protein, prostaglandin E synthetase, and glutathione-S-transferase (GST)-α, GST-μ, and GST-π

✍ Anne Mathieu; Myriam Remmelink; Nicky D'Haene; Stanislas Penant; Jean-François G 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 952 KB