3 results about "Imidazolidines" patented technology

This invention relates to a method for preparing imidazoline derivatives using heterogeneous catalysis. The invention addresses the technical problem that existing methods for synthesizing imidazoline derivatives require transition metal catalysis and involve cumbersome reaction processes. The method comprises: 1. Preparing a photocatalyst using melamine and glyoxal; 2. Preparing the imidazoline derivative under blue LED light. This invention provides a simple one-step method for synthesizing imidazolines and their derivatives, using heterogeneous materials as photocatalysts. This method eliminates cumbersome synthesis steps, achieves high yields, and is environmentally friendly. The reaction can be carried out at room temperature and pressure under mild conditions, requires no transition metal catalysis, and achieves a yield of over 40%. It has advantages such as simple operation, safety, environmental friendliness, and low cost. This invention is used for the preparation of imidazoline derivatives.

The disclosure provides Group 6 complexes, which, in some embodiments, are useful for catalyzing olefin metathesis reactions. In some embodiments, the compounds are compounds of the following formula: wherein: M is a Group 6 metal atom; X is an oxygen atom, =N-R5, =N-N(R5)(R5') or =N-0-R5, R5 and R5' independently being various substituents, such as aryl or heteroaryl, each optionally substituted; n is 0 or 1; Rz is a neutral ligand; R1 is hydrogen or an organic substituent; R2 is an aryl or heteroaryl group, each optionally substituted; R3 is an anionic ligand; and R4 is an anionic ligand, such as a pyrrolide, a pyrazolide, an imidazolide, an indolide, an azaindolide, or an indazolide, each optionally substituted.