- Production of 3,4-dihydroxy phospholane oxides
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A process for the preparation of a 3,4-dihydroxy phsopholane oxide of the formula STR1 in which R1 represents an alkyl, alkoxy, alkenyl, alkenyloxy, alkinyl or alkinyloxy with up to 18 carbon atoms and substitution products thereof; aryl and aryloxy having up to 14 carbon atoms and substitution products thereof; cycloalkyl and cycloalkoxy having up to 6 ring carbon atoms and substitution products thereof; dialkylamino having up to 6 carbon atoms per alkyl radical and substitution products thereof; and N-hetero-radicals, and R2, r3 and R4 independently of one another represent a C1 -C4 -alkyl radical or hydrogen, Comprising reacting a phospholene oxide of the formula STR2 with hydrogen peroxide in the presence of a catalytic amount of an osmium compound at a temperature in the range of about 20° to 150° C, especially about 35° to 100° C.
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