ChemInform Abstract In the presence of equimolar amounts of Ti(OiPr)4 the reaction between the carboxylic esters (I) and EtMgBr (II) affords the 1-substituted cyclopropanols (III) in high yields. This reaction offers a convenient access to cyclopropanols. The mechanism is, so far, not clear.

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287ChemInform Abstract Reaction of the lithionorcarane (I) with aluminum tribromide (II) gives the norcaranylalanes (III) depending on the molar ratio. The alanes (IV) and (V) are prepared from the corresponding Grignard compounds in a similar manner. (Stereochemical studies).

Reaction of the alkyllithium compounds (I) with the aluminum halides (II) and the magnesium halides (III) gives the complexes (IV) mentioned in the title.