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2004
Rings with 7 or more members
Q 0050
Improved and Environmentally Friendly Large-Scale Preparation of CyclohexaCycloheptadienyl Sulfone and Enantiopure Epoxy Cycloheptyl Sulfones.
49- 070 dienyl-,
— A five-step kilogram-scale synthesis of title compounds (I) and (II) is developed
which avoids use of halogenated solvents and chromatographical purifications. Asymmetric epoxidation of compound (I) is achieved by a modified Jacobsen epoxidation.
Compound (II) is mentioned to fail under these conditions due to aromatization. Epoxide (III) is a key building block in syntheses of polypropionate containing products.
— (PARK, T.; TORRES, E.; FUCHS*, P. L.; Synthesis 2004, 11, 1895-1900; Dep.
Chem., Purdue Univ., West Lafayette, IN 47907, USA; Eng.) — Nuesgen
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