Two efficient syntheses of 5-methoxy-and 8-methoxy-3-methyl-2-tetralone and the synthesis of the 7-methoxy isomer via a different route are described. Also reported is the synthesis of 8-methoxy-3, 3-dimethyl-2-tetralone. The regioselectivity of lithium carbanion formation in 1, 6-, 1, 7-, and 2, 7-dihydroxynaphthalene is discussed. The latter compound undergoes dimetalation more easily than the other isomers.
![3,7a-dimethoxy-1,1a,2,7-tetrahydrocyclopropa[b]naphthalene结构式](https://image.chemsrc.com/caspic/114/105372-16-5.png)
