119415-57-5

Upstream product

• 23743-25-1 tetra-P-benzyl-P,P'-ethanediyl-di-phosphine 
• 106-93-4 ethylene dibromide 
• 122703-97-3 bis-1,2-tribenzylphosphonium ethane dibromide 
• 7650-89-7 tribenzylphosphine 

Downstream Products

• 37714-10-6 1,4-dibenzyl-[1,4]diphosphinane 
• 110250-16-3 1,4-dibenzyl-[1,4]diphosphinane-1-oxide 

Relevant academic research and scientific papers

OXYPHOSPHORANE ANIONS AS NUCLEOPHILES IN INTRAMOLECULAR DISPLACEMENT REACTIONS

The present paper reports a kinetic study of alkaline decomposition of four bromoalkyltriphenyl phosphonium bromides with the bromo-substituent in 3-, 4-, 5, and 6-positions, respectively (hereafter designated 3Br-P, 4Br-P, 5Br-P, and 6Br-P), together with the alkaline decomposition of 1,1,4,4-tetrabenzyl-1,4-diphosphoniocyclohexane dibromide (designated 2P).The very high rates of decomposition of 3Br-P and 2P are in accordance with an easy formation of five-membered oxaphospholane ring intermediates through participation of oxyphosphorane anions in intramolecular displacement reactions, with carbon in 3Br-P, and with phosphorus in the neighbouring phosphonium cation of 2P. Key words: Oxyphosphorane anions, bromoalkyltriphenyl phosphonium bromides, 1,1,4,4-tetrabenzyl-1,4-diphosphoniocyclohexane dibromides.