The present invention discloses and exemplifies alcohol, ether and ester derivatives of difluoroalkanes and difluoroalkenylalkanes having the general formula R--(CH.sub.2).sub.m --CR.sup.2 R.sup.3 --OR.sup.1, in which R is a 1,1-difluoroalkyl or a 1,1-difluoroalkenyl group, composition thereof, and use thereof to control agricultural crop pests.
Synthesis and biological activity of new melatonin dimeric derivatives
作者:Barbara Di Giacomo、Annalida Bedini、Gilberto Spadoni、Giorgio Tarzia、Franco Fraschini、Marilou Pannacci、Valeria Lucini
DOI:10.1016/j.bmc.2007.03.080
日期:2007.7
A new series of melatonin (MLT) dimers were obtained by linking together two melatonin units with a linear alkyl chain through the MLT acetamido group or through a C-2 carboxyalkyl function. The binding properties of these ligands were evaluated in in vivo experiments on cloned human MT(1) and MT(2) receptors expressed in NIH3T3 rat fibroblast cells. The class of 2-carboxyalkyl dimers was the most
Tandem decarboxylative hydroformylation–hydrogenation reaction of α,β-unsaturated carboxylic acids toward aliphatic alcohols under mild conditions employing a supramolecular catalyst system
作者:Lisa Diab、Urs Gellrich、Bernhard Breit
DOI:10.1039/c3cc45547e
日期:——
under mild reaction conditions, compatible with a wide range reactive functional groups, is reported. The new methodology consists of a novel tandem decarboxylative hydroformylation/aldehyde reduction sequence employing a unique supramolecular catalyst system.
A Highly Efficient Conversion
of Primary or Secondary Alcohols into Fluorides with <i>n</i>-Perfluorobutanesulfonyl Fluoride-Tetrabutylammonium Triphenyldifluorosilicate
Direct fluorination of primary and secondary alcohols by a combination of perfluoro-1-butanesulfonyl fluoride (PBSF) and tetrabutylammonium triphenyldifluorosilicate (TBAT) under mild conditions provides the corresponding fluorides in high yields. With this combination, elimination side reactions could be significantly suppressed and chiral secondary alcohols were less prone to epimerization at the reaction center.
One-pot synthesis of imidazolines from aldehydes: detailed study about solvents and substrates
作者:Hiromichi Fujioka、Kenichi Murai、Ozora Kubo、Yusuke Ohba、Yasuyuki Kita
DOI:10.1016/j.tet.2006.11.007
日期:2007.1
Imidazolines were prepared in one-pot operation from aldehydes and diamines through oxidation of aminal intermediates by NBS. This method could be applied to various aromatic and aliphatic aldehydes and N-nonsubstituted and N-monosubstituted 1,2-diamines. Furthermore, it was found that CH2Cl2 could be altered to TBME, a more environmentally friendly solvent, in the reaction using N-nonsubstituted 1,2-diamines. The reaction conditions were very mild and chemoselective. (c) 2006 Published by Elsevier Ltd.