Convenient synthesis of allenylphosphoryl compounds via Cu-catalysed couplings of P(O)H compounds with propargyl acetates
作者:Ruwei Shen、Bing Luo、Jianlin Yang、Lixiong Zhang、Li-Biao Han
DOI:10.1039/c6cc02563c
日期:——
A novel Cu-catalysed substitution reaction of propargyl acetates with P(O)H compounds is developed to afford allenylphosphoryl compounds via C-P bond coupling in high yields under mild conditions. A plausible mechanism...
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: .
Copper-Catalyzed Allenylation-Isomerization Sequence of Penta-1,4-diyn-3-yl Acetates with P(O)H Compounds: Facile Synthesis of 1-Phosphonyl 2,4-Diynes
作者:Ruwei Shen、Jianlin Yang、Bing Luo、Lixiong Zhang、Li-Biao Han
DOI:10.1002/adsc.201600684
日期:2016.12.7
The copper‐catalyzed reaction of 5‐substituted penta‐1,4‐diyn‐3‐yl acetates with P(O)H compounds to efficiently give a new class of phosphonyl diynes is reported. The reaction may take place through a regioselective nucleophilic attack of phosphorus nucleophiles on Cu‐allenylidene intermediates to form allenyl intermediates followed by a rapid allene‐alkyne isomerization process. The synthetic utility