Synthesis of new chiral N-substituted fused pyrazoles and pyrazolinols
摘要:
Treatment of beta-diketones and the corresponding beta-enaminoketones, having modified carane (2-ethyl-6,6-dimethylbicyclo[3.1.0]hexane) and p-menthane (3-ethyl-1-isopropylcyclopentane) skeletons, with aryl-and alkylhydrazines results in regioselective formation of N-substituted pyrazoles or stable pyrazolinols depending on the nature of the substituent at the hydrazine nitrogen. (C) 1997 Elsevier Science Ltd.
Synthesis of new chiral heterocycles of the pyrazole and 2-isoxazoline types from (+)-3-carene.
摘要:
Preparation of chiral heterocyclic compounds of the pyrazole and 2-isoxazoline types starting from natural monoterpene hydrocarbon (+)-3-carene is described. Stereochemical assignment of the compounds synthesized is made by NMR spectroscopy and X-ray analysis together with the data obtained by molecular mechanics and quantum chemical calculations.