Esterification of Aldehydes and Alcohols with Pyridinium Hydrobromide Perbromide in Water
作者:Shinsei Sayama、Tetsuo Onami
DOI:10.1055/s-2004-835630
日期:——
The direct esterification of aldehydes and alcohols was carried out with pyridinium hydrobromide perbromide in water at room temperature. A variety of aldehydes were converted to respective ester derivatives with alcoholssuch as methanol, 1,2-ethanediol, 1,3-propanediol. Further, a variety of aliphatic alcohols were also converted to the corresponding Tishchenko-like dimeric esters in good yields under
The palladium‐catalyzed hydroesterification reaction was performed with polyols and olefins in a liquid/liquid biphasic system composed of unreacted polyol on the one hand and apolar reaction products/organic solvents on the other hand. The palladium‐based catalyst was immobilized in the polyolphase thanks to the use of cationic triarylphosphines possessing pendent protonated amino groups in the acidic
Methods and compositions for the control of nematodes are disclosed. Specifically, fatty acid ester compounds have been found to advantageously control nematodes at concentrations which are non-phytotoxic. The fatty acid ester compounds can be used in conjunction with other nematicidal agents such as free fatty acids, fatty acid salts, avermectins, ivermectin, and milbemycin.
The subject invention pertains to novel methods and compositions utilizing novel fatty acid esters which exhibit excellent herbicidal activity in controlling unwanted vegetation. The novel compositions and methods described here facilitate effective weed control using a wide range of fatty acids.
Materials and methods for killing nematodes and nematode eggs
申请人:Mycogen Corporation
公开号:US06124359A1
公开(公告)日:2000-09-26
Methods and compositions for the control of nematodes are disclosed. Specifically, fatty acid ester compounds have been found to advantageously control nematodes at concentrations which are non-phytoxic. The fatty acid ester compounds can be used in conjunction with other nematicidal agents such as free fatty acids, fatty acid salts, avermectins, ivermectin, and milbemycin. In another embodiment, the subject invention further provides methods for killing the eggs of nematodes. Thus, the subject invention further relates to the surprising discovery that certain fatty acid esters have ovicidal activity against nematode eggs.