Haerling, Stephan M. published the artcilePotassium Dimesitylphosphinite Catalyzed Intermolecular Hydrophosphorylation of Alkynes, Formula: C18H23OP, the publication is Organometallics (2018), 37(23), 4380-4386, database is CAplus.
The authors evaluated the scope of the intermol. hydrophosphorylation (Pudovik reaction) of alkynes R1-Cú·C-R2 (R1 = H, alkyl, Ph; R2 = alkyl, Ph, COOMe, SiMe3, Si(iPr)3) with bis(2,4,6-trimethylphenyl)phosphine oxide (dimesitylphosphine oxide, Mes2P(O)H) in THF at room temperature or 65¡ã, catalyzed with 5 or 10 mol % of K dimesitylphosphinite (Mes2P-O-K), yielding alkenyldimesitylphosphine oxides (Mes2P(O)-C(R1):C(H)R2). This procedure requires substituents with a -I effect at the Cú·C triple bond, whereas alkyl-substituted alkynes are inactive under these reaction conditions. The hydrophosphorylation proceeds regioselectively, but E/Z isomer mixtures were obtained. E/Z isomerization occurs at elevated temperatures with an estimated energy barrier of 59 kJ mol-1 (R1 = Me; R2 = Ph). Trimethylsilyl substituents at the alkyne functionality (R1 = H, Bu; R2 = SiMe3) destabilize the product, leading to degradation and formation of Mes2P-O-SiMe3 and R1-Cú·C-H.
Organometallics 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, Formula: C18H23OP.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia