Wie im Formelschema angegeben ist, werden die 2‐R‐1‐Phenyl‐I ‐phospha‐bicy‐ cIo[4,4,0Jdecan‐4‐one (III) hergestellt und zu den Oxo‐, Thiono‐ bzw. Seleno‐Derivaten (V) bzw. (VI) umgesetzt.

1991 organo-phosphorus compounds, nonmetal heterocycles organo-phosphorus compounds, nonmetal heterocycles S 0087 -228Synthesis and Molecular Structure of a trans-Stereoisomer of 2-Phenyl-2-phosphabicyclo(4.4.0)decane-2,5-dione (m.p. 145 -146 • C).-Isomerization of the cis-phosphabicyclodecanone (I), previously described, in an alkaline medium forms a mixture of 36% (I) and 64% of the transstereoisomer (II) which is separated chromatographically. (X-Ray analysis of (II): monoclinic, space group P21/n, Z = 4). -(BOSYAKOV, YU. G.; SHIGANAKOVA, O. V.; ESPENBETOV, A. A.; STRUCHKOV, YU. T.; Zh.

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