The present invention provides a process for the preparation of mono- and bisacylphosphanes based on formula (I):
as well as for their corresponding oxides or sulfides. The present invention further relates to photoinitiators obtainable by said process.
phospha-Michael addition of bis(mesitoyl)phosphine to a variety of activated C−C bonds was investigated. Simple amine bases were employed as catalysts, with tetramethylguanidine showing an outstanding performance and allowing the preparation of bis(acyl)phosphines under very mild conditions in excellent yields and short time. Oxidation of the bis(acyl)phosphines led to bis(acyl)phosphane oxides, a substance
The present invention provides a process for the preparation of mono- and bisacylphosphanes based on formula (I):
as well as for their corresponding oxides or sulfides. The present invention further relates to photoinitiators obtainable by said process.
The present invention provides a process for the preparation of mono- and bisacylphosphanes based on formula (I):
as well as for their corresponding oxides or sulfides. The present invention further relates to photoinitiators obtainable by said process.