Chemistry of Heterocyclic Compounds p. 424 - 430 (1990)
Update date:2022-08-05
Topics:
Prostakov, N. S.
Varlamov, A. V.
Hussein, A.
Fomichev, A. A.
Ryabova, N. A.
Stashenko, E. E.
Spiro<4-azafluorene-9,1'-cyclopropanes> were obtained by the reaction of 9-diazo-4-azafluorene with various alkenes in the form of a mixture of geometrical isomers differentiated according to the position of the substituents in the cyclopropane ring and also according to position relative to the pyridine ring.In the reaction of 9-diazo-4-azafluorene with cyclopentanone, di(4-azafluorene-9-yl) oxide is formed, while from its reaction with cyclohexanone, 2'-oxo-spiro<4-azafluorene-9,1'-cycloheptane> is obtained.
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