## Abstract A convenient synthesis of the strained methylene‐bridged __trans__‐cyclooctenes bicyclo[3.3.1]‐1 (2)‐nonene **(1)**, bicyclo[4.2.1]‐1(8)‐nonene **(2)**, and bicyclo[4.2.1]‐1(2)‐nonene **(3)** by the intramolecular __Wittig__ reaction is described (see __Schemes 1–4__). The (3‐oxocycloal
The Synthesis of Cycloalkenes by the Intramolecular Wittig Reaction
✍ Scribed by Konrad B. Becker
- Publisher
- John Wiley and Sons
- Year
- 1977
- Tongue
- German
- Weight
- 799 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
A simple synthesis of a series of bicyclo[m.n.0]‐1‐alkenes (m, n = 3,4,5) from 2‐oxocycloalkanecarboxylates by the intramolecular Wittig reaction is reported (see p. 70–72). The spectral properties (IR., ^1^H‐NMR. and ^13^C‐NMR.) of these annulated trisubstituted olefins are discussed.
📜 SIMILAR VOLUMES
## Abstract 3a,8a‐Dihydroxy‐1,3,3a,8a‐tetrahydro‐ indeno[1,2‐__d__]imidazole‐2,8‐dione **3** reacts with dialkyl acetylenedicarboxylates in the presence of triphenylphosphine to produce some novel interesting dihydrofuran derivatives diastereoselectively. © 2006 Wiley Periodicals, Inc. Heteroatom C
## Abstract The title compounds 12, which are key intermediates for antitumoral diazaquinomycin A analogues, are obtained by intramolecular Wittig reaction of 1‐[3′,6′‐dimethoxy‐2′‐(α‐oxoacylamino)phenyl]alkyltriphenylphosphonium salts 11, which are prepared via lithiation of 2′,5′‐dimethoxy‐__N__‐