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.

065ChemInform Abstract The reactions of E-1-benzoyl-1-bromo-2-phenylcyclopropane (Ia), E-1-benzoyl-1-bromo-2-butyl-and 1-benzoyl-1-bromocyclopropane (Ib) and of 7-endo-benzoyl-7-exo-bromobicyclo(4.1.0)heptane (Ic) with reagent (III) according to method A) afford the phenylthio derivatives (II). Their formations probably proceed via the lithium enolate intermediates (VII), which are formed by initial attack of the thiophenolate anion on the bromine atom of (I). Subsequent attack of PhSBr on (VII) affords the products (III) by "crypto" nucleophilic substitution. The Z-1-benzoyl-1-bromo-2-phenylcyclopropane (IV), on reaction with (III) according to method A) affords the products (V) and (VI), resulting from reductive debromination.

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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).