Reactivity and endo–exo Selectivity in Diels–Alder Reaction of o-Quinodimethanes. An Experimental and DFT Computational Study
摘要:
endo-exo Selectivity in Diels-Alder cycloadditions of several o-quinodimethanes (1-4) with acrylonitrile, 2-(5H)-furanone and N-methylmaleimide has been investigated in acetonitrile solution. Transition structures of the cycloaddition of the parent o-QDM (1), (E,E)1,8-dimethyl-o-QDM (2), isoindene (3) and 2,3-dihydronaphthalene (4) with acrylonitrile and maleimide were located at both HF/6-31G* and B3LYP/6-31G* methods. Theoretical data reproduce fairly well both experimental absolute reaction rates and diastereoisomer ratios. The high endo selectivity has been rationalized mainly as a result of solvation effects (acetonitrile, PCM model) and reactant deformations. The latter is due to steric interactions. (C) 2000 Elsevier Science Ltd. All rights reserved.
COMPOSITIONS CONTAINING AND METHODS OF USING 1-AMINOINDAN AND DERIVATIVES THEREOF AND PROCESS FOR PREPARING OPTICALLY ACTIVE 1-AMINOINDAN DERIVATIVES
申请人:——
公开号:US20020068839A1
公开(公告)日:2002-06-06
Novel derivatives of 1-aminoindan and their salts are described. Optically active 1-aminoindan derivatives are prepared by reacting a N-benzyl analog of the desired compound with an enantiomer of mandelic acid. Parkinson's disease, dementia, epilepsy, convulsions, or seizures are treated by administering a compound of the formula:
1
INDANE-AMINE DERIVATIVES, THEIR PREPARATION AND USE AS MEDICAMENTS
申请人:Garcia-Lopez Monica
公开号:US20120264799A1
公开(公告)日:2012-10-18
The present invention relates to indane-amine derivatives, to processes for the preparation thereof, to medicaments comprising them as well as to their use for the preparation of a medicament for the treatment of 5HT7 receptor mediated diseases or conditions.