Preparation of Esters of Carboxylic and Phosphoric Acid<i>via</i>Quaternary Phosphonium Salts
作者:Oyo Mitsunobu、Masaaki Yamada
DOI:10.1246/bcsj.40.2380
日期:1967.10
When n-valeric acid was treated with allyl diethyl phosphite and diethylazodicarboxylate, allyl valeriate and diethyl N-(diethyl)phosphoryl hydrazodicarboxylate were obtained in good yields. Similarly ethyl benzoate was obtained in a nearly quantitative yield by the reaction of benzoic acid with triethyl phosphite and diethylazodicarboxylate. The reaction of carboxylic acid with triphenyl phosphine
metathesis of the various Cs‐symmetric (π‐arene)chromium substrates provides the corresponding bridged planar‐chiral (π‐arene)chromium complexes in excellent yields with up to >99 % ee. With a bulky and unsymmetrical substituent, such as N‐indolyl or 1‐naphthyl, at the 2‐positions of the η6‐1,3‐diisopropenylbenzene ligands, both biaryl‐based axial chirality and π‐arene‐based planar chirality are simultaneously
Tridentate phosphines and method of forming aldehyde hydrogenation catalysts
申请人:Dow Global Technologies Inc.
公开号:US07217848B2
公开(公告)日:2007-05-15
This invention comprises a process for hydrogenation of aldehydes to alcohols using novel homogeneous catalysts. The catalysts are generated in situ under hydrogen and carbon monoxide gases in a suitable solvent, by mixing a rhodium catalyst precursor, such as Rh(CO)2 acetoacetonate and a defined ligand.