Phosphorus-containing products from the reaction of propargyl alcohols with phosphorus trihalides. 4. Alkyl substituent effects on oxaphospholene formation
Recherches sur la formation et la transformation des esters LVII. Acides ou chlorures d'acides de PIII et alcools ?-ac�tyl�niques: est�rification sans ou avec r�arrangement
When α-acetylenic alcohols are reacted with acid chlorides of trivalent phosphorus in the presence of a tertiary base, the intermediate trivalent esters rearrange to pentavalent phosphorus derivatives, with formation of a new PC bond. Generally, the C3 group fixed on the phosphors has an allenic structure: ; in some cases this group tautomerizes to the corresponding acetylenic derivative: .
Reaction of 2-chloro-5,5-dimethyl-2,5-dihydro-1,2λ5-oxaphosphole 2-oxide with organomagnesium compounds
作者:D. A. Tatarinov、V. K. Brel’、V. F. Mironov
DOI:10.1134/s1070428015090043
日期:2015.9
Simple procedures have been developed for the synthesis of 2-chloro-5,5-dimethyl-2,5-dihydro- 1,2 lambda(5)-oxaphosphole 2-oxide by one-pot electrophilic cyclization of 3-methylbuta-1,2-dien-1-ylphosphonic dichloride and of (Z)-4-[dialkyl(diphenyl)phosphoryl]-2-methylbut-3-en-1-ol by reaction of 2-chloro-5,5-dimethyl- 2,5-dihydro-1,2 lambda(5)-oxaphosphole 2-oxide with organomagnesium compounds.
Formation and cyclization of allenic phosphonic acids. 7. Epoxidation of allenic phosphonic acids. Intramolecular trapping of allene oxides
作者:Roger S. Macomber
DOI:10.1021/jo00403a054
日期:1978.4
Phosphorus-containing products from the reaction of propargyl alcohols with phosphorus trihalides. 4. Alkyl substituent effects on oxaphospholene formation
作者:Roger S. Macomber、Eugene R. Kennedy
DOI:10.1021/jo00881a028
日期:1976.9
Different reactivity of phosphorylallenes under the action of Brønsted or Lewis acids: a crucial role of involvement of the P=O group in intra- or intermolecular interactions at the formation of cationic intermediates
作者:Stanislav V Lozovskiy、Alexander Yu Ivanov、Aleksander V Vasilyev
DOI:10.3762/bjoc.15.151
日期:——
of hydroarylation of the allene system, phosphoryl-substituted alkenes and/or indanes. This is the first example of a Lewis acid-promoted intermolecular hydroarylation of allenes bearing electron-withdrawing substituents. Plausible reaction mechanisms have been proposed on the basis of the investigated reactions, and NMR analysis and DFT studies of the intermediate cationic species.