Belmokaddem, Fatima-Zohra published the artcileNovel nucleophilic/basic and acidic organocatalysts for reaction between poorly reactive diisocyanate and diols, Name: Dimesitylphosphine oxide, the publication is Designed Monomers and Polymers (2016), 19(4), 347-360, database is CAplus.
Original basic or acidic organic compounds derived from guanidine or Ph phosphonic acid were specifically designed and tested as new catalysts for the bulk synthesis of polyurethane prepolymers from a precursor system with particularly low reactivity (secondary alc. + aliphatic isocyanate at low temperature). Both families showed interesting catalytic activities at 60-80¡ã, but must nevertheless be used in much higher amounts (1 mol%, i.e. between 0.15 and 0.50 wt%) than traditional metal-based catalysts. The efficiency of guanidine derivatives seems to be related to their nucleophilicity, whereas that of phosphonic acid derivatives depends on their acidity. However, the solubility of the considered species in the reactive medium also plays a major role. The water/alc. selectivity of the catalysts, especially at room temperature, was then examined as an addnl. criterion. Guanidines are not selective and favor the reaction of isocyanate groups with water as much as that with alcs. Ph phosphonic acid derivatives are more selective, and particularly pentafluorophenyl phosphonic acid displays a remarkable catalytic activity together with an acceptable selectivity and could represent an interesting and safer alternative to toxic tin and mercury derivatives for many industrial polyurethanes.
Designed Monomers and Polymers published new progress about 23897-16-7. 23897-16-7 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Dimesitylphosphine oxide, and the molecular formula is C18H23OP, Name: Dimesitylphosphine oxide.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia