98. P. Müller, G. Bernardinelli, H.C.G.-N. Thi,
    “Aromatization of tetrahydrocyclopropa[α]naphthalenes: An alternative synthesis of 1H-Cyclopropa[α]naphthalene”
    Helv. Chim. Acta 1989, 72, 1627-1638.

1H-Cyclopropa[a]naphthalene (1a) is accessible via reduction of the dichloro compound 1c with LiAlH₄/AlCl_3. Several derivatives of tetrahydrocyclopropa[a]naphthalene were synthesized. However, contrary to their 1,1-dihalogeno analogues, they afforded no cycloproparenes upon attempted aromatization.

DOI : 10.1002/hlca.19890720723 

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