1433998-73-2

Upstream product

• 35948-25-5 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide 
• 99-93-4 4-Hydroxyacetophenone 
• 1745-81-9 o-Allylphenol 
• 1433998-72-1 1-(3-allyl-4-hydroxyphenyl)-1-(4-hydoxyphenyl)-1-(6-oxido-6H-dibenz[c,e][1,2]oxaphosphorin-6-yl)ethane 
• 350-46-9 4-Fluoronitrobenzene 

Downstream Products

• 1433998-74-3 C₄₁H₃₅N₂O₄P 

Relevant academic research and scientific papers

Synthesis of thermosetting polyetherimide-containing allyl groups

An allyl-containing diphenol, 1-(3-allyl-4-hydroxyphenyl)-1-(4- hydoxyphenyl)-1-(6-oxido-6H -dibenz[c,e][1,2]oxaphosphorin-6-yl)ethane (1), was prepared from a one-pot reaction of 9,10-dihydro-oxa-10-phosphaphenanthrene-10- oxide, 4-hydroxyacetophenone, and 2-allylphenol in the presence of p-toluenesulfonic acid monohydrate. Then, an allyl-containing dietheramine, 1-(4-(4-aminophenoxy)phenyl)-1-(3-allyl 4-(4-aminophenoxy)-phenyl)-1-(6-oxido- 6H-dibenz[c,e][1,2] oxaphosphorin-6-yl)ethane (3), was prepared from the nucleophilic substitution of (1) with 4-fluoronitrobenzene, followed by the reduction of the dinitro groups by Fe/HCl. A flexible polyetherimide (PEI) (4) with a curable characteristic was prepared from the condensation of (3) and 4,4′-oxydiphthalic anhydride (ODPA) in m-cresol in the presence of isoquinoline. Curing PEI (4) at 300°C leads to PEI (5), which exhibits much a higher Tg value (307°C) and a lower coefficient of thermal expansion (CTE) (29 ppm/°C) than PEI (4) (Tg = 253°C, CTE 52 ppm/°C).