94. P. Müller, J.-P. Schaller,
    “4-aza-2,7-dimethyl-[1-H]cyclopropa[b]-naphthalene. The first nitrogen analogue of a cyclopropanaphthalene”
    Tetrahedron Lett. 1989, 30, 1507-1510.

The title compound 1 is synthesized via Diels-Alder addition of 4-aza-2,7-dimethyl-isobenzofuran (5) to 1,2-bromochlorocyclopropene and aromatization of the adduct 6 with low-valent titanium.

The title compound 1 is synthesized by aromatization of the cycloadduct 6 of 4-aza-2,7-dimethyl-isobenzofuran 5 to 1,2-bromochlorocyclopropene with low-valent titanium.

DOI : 10.1016/S0040-4039(00)99503-0 

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