Abstract:
A hydrazide fixed to a resin represented by formula (1): P-Q-CO-NH-NH2 wherein P represents a main chain of a polymer constituting the resin and Q represents a hydrocarbon side chain optionally substituted with a substituent which may be boned via a heteroatom, a hydrazone fixed to a resin derived therefrom and represented by following formula: P-Q-CO-NH-N=CH-R and a method for synthesizing pyrazolones in a solid phase using the resin-fixed hydrazone. The invention allows the synthesis of pyrazolones by application of a Mannich type reaction in a solid phase and also allows making an efficient library with respect to various types thereof.
Abstract:
The present invention provides a polysilane-supported transition metal catalysts or a polysilane/inorganic compound-supported transition metal catalysts, wherein various types of transition metals are supported by polysilane compounds, or combination of polysilanes and inorganic compounds. The catalysts of the present invention are hardly soluble in hydrocarbons and alcohols and are useful as catalysts in heterogeneous system for various organic synthetic reactions using the above solvents. Polysilanes supporting transition metals are easily crosslinkable by thermal treatment, microwave irradiation, UV irradiation or chemical methods such as hydrosilylation reaction and are changed to be insoluble in various solvents keeping high catalytic activity. Moreover, the stability and operability of polysilane-supported transition metal catalysts will be improved by the support thereof on inorganic compounds. These polysilane-supported transition metal catalysts show a high catalytic activity in hydrogenation reaction, hydrosilylation reaction, Heck reaction, Suzuki-Miyaura coupling reactions and the like. The catalyst is easily recoverable and reusable and the leakage of metals is extremely few.