On the enantiomers of 2-dimethylamino-3-pentanone, key intermediates in the synthesis of analgesic alkylaminoalkylnaphthalenes
摘要:
2-Dimethylamino-3-pentanone 1 is the key intermediate in the synthesis of alkylaminoalkylnaphthalenic analgesics. In this paper the resolution of this compound with L- and D-dibenzoyltartaric acids is described. The behavior of the diastereomeric dibenzoyltartrates and of the enantiomers in solution is investigated by NMR spectroscopy, polarimetry and chiral gas-chromatographic analysis. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
The study of dialkylaminoalkylnaphthalenes as novel opioid-like analgesics is reported. In particular, the synthesis of (IX,2R/1S,2S)-1-ethyl-1-[2-(6-hydroxynaphthyl)]-1-hydroxy-2-methyl-2-dimethylaminoethane and its structural analogue (1R,2R/1S,2S)-1-ethyl-1-[2-(6-fluoronaphthyl)]-1-hydroxy-2-methyl-2-dimethylaminoethane and the configurational analysis by X-ray and H-1 NMR spectroscopy are described. Pharmacological profiles are discussed on the basis of the experimental results of analgesia tests (hot plate and writhing test) and rota-rod test, which was performed to distinguish analgesia from drug-induced motor changes. The compounds showed dose-dependent antinociception, with less potency than morphine. Motor coordination appeared to be less involved. (C) 2000 Elsevier Science Ltd. All rights reserved.
On the enantiomers of 2-dimethylamino-3-pentanone, key intermediates in the synthesis of analgesic alkylaminoalkylnaphthalenes
2-Dimethylamino-3-pentanone 1 is the key intermediate in the synthesis of alkylaminoalkylnaphthalenic analgesics. In this paper the resolution of this compound with L- and D-dibenzoyltartaric acids is described. The behavior of the diastereomeric dibenzoyltartrates and of the enantiomers in solution is investigated by NMR spectroscopy, polarimetry and chiral gas-chromatographic analysis. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
Synthesis and properties of cyclic keto alkenylammonium salts
作者:Michael E. Jung、Brian E. Love
DOI:10.1039/c39870001288
日期:——
The cyclicketoalkenylammoniumsalts (4)–(8) have been prepared by a short, general route and their acidic and electrophilic properties examined.