Catalytic asymmetric synthesis of diphenylbutazone analogues
作者:Shi-Wu Li、Qiang Kang
DOI:10.1039/c8cc06426a
日期:——
The asymmetric Michael addition of diphenylbutazone and its analogues to α,β-unsaturated 2-acyl imidazoles has been developed with a chiral-at-metal Rh(III) complex as a catalyst. The corresponding adducts were obtained in good yields (89–98%) with excellent enantioselectivities (up to >99%). The reaction can be conducted on a gram-scale with a low catalyst loading (0.04 mol%) without impacting its
POLYMERIZATION INITIATOR, CURABLE COMPOSITION, DENTAL MATERIAL, AND PREPARATION KIT FOR CURABLE COMPOSITION
申请人:Mitsui Chemicals, Inc.
公开号:EP3835329A1
公开(公告)日:2021-06-16
Provided is a polymerization initiator, which has an excellent curing rate and is an alternative to a polymerization initiator system using a benzoyl peroxide-aromatic amine compound, a curable composition containing the polymerization initiator, a dental material and dental filler material containing the composition, and a kit for preparing the curable composition.
The present invention includes a polymerization initiator containing one or more compounds (A) selected from the group consisting of a pyrazolidinedione compound and/or pyrazolidine(di)thione compound (A1), a salt (A2) of the compound (A1), and a malonate compound (A3).