Phosphorus-ylides: powerful substituents for the stabilization of reactive main group compounds
نویسندگان
چکیده
منابع مشابه
The Chemistry of Heteroarylphosphorus Compounds, Part 14 [1] Effects of Heteroaryl Substituents at Phosphorus on the Steric Course of Wittig Reactions of Semistabilised and Stabilised Ylides
Alkene cis-trans Ratio, Betaine Mechanism, Cycloaddition Mechanism The cis-trans ratio of the stilbenes formed in Wittig reactions of semistabilised ylides (derived from benzyltri(hetero)arylphosphonium salts in ethanolic ethoxide) with benzaldehyde decreases markedly in the series 2-furyl >2-thienyl >phenyl > 1-methylpyrrol2-yl. The 2-furyl group favours a greater proportion of the ci«-isomer ...
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ژورنال
عنوان ژورنال: Chemical Science
سال: 2021
ISSN: 2041-6520,2041-6539
DOI: 10.1039/d0sc03278f