55277-57-1

Basic information

• Product Name: 5-ethyl-5H-dibenzophosphole 5-oxide
• Synonyms: 5-ethyl-5H-dibenzophosphole 5-oxide
• CAS NO: 55277-57-1
• Molecular Weight: 228.23
• Mol File: 55277-57-1.mol
• Article Data: 4

Chemical Properties

• CAS DataBase Reference: 5-ethyl-5H-dibenzophosphole 5-oxide(CAS DataBase Reference)
• NIST Chemistry Reference: 5-ethyl-5H-dibenzophosphole 5-oxide(55277-57-1)
• EPA Substance Registry System: 5-ethyl-5H-dibenzophosphole 5-oxide(55277-57-1)

Safety Data

• Hazardous Substances Data: 55277-57-1(Hazardous Substances Data)

Upstream product

• 113460-16-5 C₂₇H₃₁OP 
• 13029-09-9 2,2'-dibromobiphenyl 
• 762-04-9 phosphonic acid diethyl ester 
• 1536470-66-2 P-ethylidene-P-phenyldibenzophosphole 
• 1377975-28-4 P-ethyl-P-phenyl-5H-dibenzophospholium bromide 
• 113460-17-6 C₂₅H₂₇OP 

Downstream Products

• 104891-68-1 2-(5-Oxo-5H-5λ⁵-dibenzophosphol-5-yl)-1-phenyl-propan-1-one 
• 104891-71-6 6-(tert-Butyl-diphenyl-silanyloxy)-2-(5-oxo-5H-5λ⁵-dibenzophosphol-5-yl)-hexan-3-one 
• 383197-71-5 (R_P,S_C)-5-ethyl-3-(2-methylbutoxy)-7-(4-undec-10-enoxyphenoxycarbonyl)-5H-dibenzophosphole 
• 383197-71-5 (S_C,S_P)-5-ethyl-3-(2-methylbutoxy)-7-(4-undec-10-enoxyphenoxycarbonyl)-5H-dibenzophosphole 
• 386768-41-8 (S_C)-5-ethyl-3-(2-methylbutoxy)-7-(4-undec-10-enoxyphenoxycarbonyl)-5H-dibenzophosphole 5-oxide 

Relevant articles and documents

The Mechanism of Phosphonium Ylide Alcoholysis and Hydrolysis: Concerted Addition of the O?H Bond Across the P=C Bond

The previous work on the hydrolysis and alcoholysis reactions of phosphonium ylides is summarized and reviewed in the context of their currently accepted mechanisms. Several experimental facts relating to ylide hydrolysis and to salt and ylide alcoholysis are shown to conflict with those mechanisms. In particular, we demonstrate that the pKavalues of water and alcohols are too high in organic media to bring about protonation of ylide. Therefore, we propose concerted addition of the water or alcohol O?H bond across the ylide P=C bond. In support of this, we provide NMR spectroscopic evidence for equilibrium between ylide and aclohol that does not require the involvement of phosphonium hydroxide. We report the first P-alkoxyphosphorane to be characterised by NMR spectroscopy that does not undergo exchange on an NMR timescale. Two-dimensional NMR spectroscopic techniques have been applied to the characterisation to P-alkoxyphosphoranes for the first time.

DBP YLDES: WITTIG REAGENTS FOR SYNTHESIS OF E-ALKENES FROM ALDEHYDES

Phosphorus yldes based on the dibenzophosphole (DPP) ring system convert aldehydes into trans-disubstituted oxaphosphetanes with good to excellent selectivity.Decomposition at 70-110 deg C affords alkenes with E:Z rations from 6:1 to > 100:1.