Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2005-08-16
2005-08-16
Lambkin, Deborah C. (Department: 1626)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C549S043000, C549S049000, C549S457000, C549S465000, C548S516000
Reexamination Certificate
active
06930190
ABSTRACT:
A process for preparing heterocyclic pentalene derivative having formula (I): wherein w is a sulfur atom (S), an oxygen atom (O) or a NR or PR group, wherein R is an hydrocarbon group; R1, R2, R3, and R4, equal to or different from each other, are hydrogen atoms or hydrocarbon groups; said process comprising the following steps: a) contacting a compound of formula (II) T is a OR, NR2, CCI3, CF3, Cl, Br, I, imidazolil or pirazolyl radical; with at least one molar equivalent of a vinyl compound of formula (III): wherein M is MgHal, Li, K, ZnHal, wherein Hal is chlorine, bromine or iodine; (II), (III) b) treating the compound of formula obtained in step a) with a Bronsted acid; c) treating the compound obtained in step b) with a reducing agent; and d) dehydrating the alcohol obtained in step c) in order to obtain the compound of formula (I).
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Bagrov Vladimir V.
Nifant'ev Ilya E
Basell Polyolefine GmbH
Lambkin Deborah C.
Song Cheng Q.
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