Syntheses and Cytotoxic Properties of the Curcumin Analogs 2,6‐Bis(benzylidene)‐4‐phenylcyclohexanones
作者:Ryan Davis、Umashankar Das、Hilary Mackay、Toni Brown、Susan L. Mooberry、Jonathan R. Dimmock、Moses Lee、Hari Pati
DOI:10.1002/ardp.200800028
日期:2008.7
Fifteen curcuminanalogs were synthesized and tested for in‐vitro cytotoxicity towards B16 and L1210 murine cancer cell lines using an MTT assay. Significant activity was discovered for two analogs: 8 (B16 IC50 = 1.6 μM; L1210 IC50 = 0.35 μM) and 9 (B16 IC50 = 0.51 μM; L1210 IC50 = 1.2 μM). Several other analogs exhibited notable cytotoxicity. The data from quantitative structure‐activity relationships
Isomerisierung von kristallinen 1,2,3-Tris(arylmethylen)cyclohexanen zu 1,2,3-Tris(arylmethyl)benzolen durch gasförmigen Bromwasserstoff
作者:Herbert Frey
DOI:10.1055/s-1992-26119
日期:——
1,2,3-Tris(arylmethylene)cyclohexanes (eleven examples) are prepared by aldol condensation from aromatic aldehydes and cyclohexanones, followed by Wittig olefination. They are rearranged nearly quantitatively by gasous hydrogen bromide to 1,2,3-tris(arylmethyl)benzenes.
Phosphine catalyzed enantioselective [3+2] cyclizations on 4-substituted 2,6-diarylidenecyclohexanones and 2,4-diarylidene-bicyclo[3.1.0]hexan-3-ones take place with high diastereo- and enantioselectivity levels. The process affords spirocyclic compounds with excellent stereochemical control of up to five stereogenic centres.