The present disclosure is drawn to a photo active agent which includes a bisacylphosphinic compound in the form of an acid or salt having Structure I: where A and A′ are independently aryl or from C2 to C8 lower alkyl; M is H, a monovalent cation, a divalent cation, or mixture thereof; n is 1 or 2; and q is 1 or 2. The photo active agent can be present in a composition that includes from 0.001 wt % to 5 wt % of a dialcohol phosphinic acid precursor or dialcohol phosphinic salt of the bisacylphosphinic compound of Structure I.
[EN] NOVEL PHOTO-INITIATORS AND THEIR APPLICATION<br/>[FR] NOUVEAUX PHOTO-INITIATEURS ET LEUR UTILISATION
申请人:ETH ZUERICH
公开号:WO2019175112A1
公开(公告)日:2019-09-19
The present invention relates to novel bisacylphosphinic acids, salts and derivatives thereof as well as their use as photo-initiators with superior water solubility and photo-activity. The invention further encompasses versatile processes for the preparation of the aforementioned compounds.
Synthesis of a New Class of Phosphinic Acids: Synthesis of Novel Four-Membered Cyclic Oxaphosphetanes by Intramolecular Mitsunobu Reaction of Bis(α-hydroxyalkyl)phosphinic Acids
novel class of phosphinicacid derivatives, four-membered cyclic oxaphosphetanes, was synthesized by the reaction of bis(hydroxymethyl)phosphinicacids with a mixture of triphenylphosphine and diisopropyl azodicarboxylate in toluene-dichloromethane at room temperature via an intramolecular Mitsunobu reaction. bis(α-hydroxyalkyl)phosphinicacids - oxaphosphetane - cyclicphosphinicacids - Mitsunobu reaction
investigated under basic and acidicmedia. It was demonstrated that the real phosphorylating agent involved in the reaction was phosphane (PH3) in basicmedia, and hypophosphorous acid (H3PO2) in acidicmedia. A convenient one-pot synthesis of (α-hydroxyalkyl)phosphinic acids from red phosphorus and aldehydes in basicmedia was realized under sonication. The same reaction under acidicmedia in the presence