9,10-Dihydrophenanthrenes and phenanthrenes, mimics of natural compounds with strong antialgal activity, have been synthesized through cross-coupling of 1-(2-iodo-5-methoxy)-phenylethanol with variously substituted iodobenzenes. The synthetic compounds, bearing a hydroxyl or a methoxyl group at C-2 and a methyl in the C ring, were tested against the green alga Selenastrum capricornutum. All compounds, except 2-methoxy-7-methylphenanthrene, caused inhibition of algal growth by more than 70% at 10(-4) M, and many of them retained this strong activity at 10(-5) M.
3-Methylcyclohex-2-enone derivatives as initiators of cyclisation. Part 2. Monocyclisations to six-membered rings
作者:Joseph A. Amupitan、Enamul Huq、Michael Mellor、Edward G. Scovell、James K. Sutherland
DOI:10.1039/p19830000751
日期:——
Cyclisation of 3-methylcyclohex-2-enones and the derived epoxides containing alkene, alkyne, and aryl side-chains yields bicyclo[4.4.0]decane derivatives when the alkene or alkyne is electronically biased towards six-memberedring formation and when the alkene is electronically unbiased.