The reaction of methoxycarbonylmethylene 2b-and ethoxycarbonylmethylene 2e-triphenylphosphoranes with substituted 2-amino-l,4naphthoquinones la-c afforded the new p>rroline-ylidphosphoranes 3b-3g via 1,2-and 1,4-addition reactions. On the other hand, 2-dimethylamino-l,4-naphthoquinone ld reacts with
Studies on phosphonium ylide. XVIII. The reaction of Wittig reagents with phthalimidobenzoic acid azides
β Scribed by Leila Sadek Boulos; Nahed Khir Eldin
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- French
- Weight
- 433 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0040-4020
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π SIMILAR VOLUMES
The reaction of aldehydes with oxido ylides shows a dramatic dependence of alkene stereochemistry on the distance between oxygen and phosphorus atoms; ylides with proximal 0 and P atoms favor production of g alkenes. The high r stereoselectivity with r-oxido ylides is not mainly attributable to intr
## 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 βFull Textβ option. The original article is trackable v
## Abstract Wittig reagents (__1aβc__) react with Nβ(phenylsulfonyl)β1,4βbenzoquinone monoimine __2a__ to give adducts __3a__, __4a__, and __4b__. On the other hand, the reactions of __2b__ with the same ylides (__1aβc__) yield the new products __3b__, __6a__, and __6b__, respectively. Mechanisms a