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3-tert-Butyl-2-oxo-1-oxaspiro-[4.5]dec-3-en-4-yl 4-chloro-benzoate.

ABSTRACT: The title tetronic acid derivative, C(20)H(23)ClO(4), which is a spiro-diclofen analogue, has two crystallographically independent mol-ecules in the asymmetric unit (Z' = 2). The cyclo-hexane rings in the respective mol-ecules A and B adopt chair conformations [four C atoms are planar with mean deviations of 0.013?(2) and 0.001?(2)?Å, and the flap positions deviate by 0.653?(4) and -0.663?(3)?Å (mol-ecule A) and 0.642?(4) and -0.643?(5)?Å (mol-ecule B) from the plane]. The furan ring makes dihedral angles of 86.9?(1) (mol-ecule A) and 85.4?(1)° (mol-ecule B) with the respective benzene rings.

SUBMITTER: Wang ZC 

PROVIDER: S-EPMC3201220 | biostudies-literature | 2011 Oct

REPOSITORIES: biostudies-literature

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3-tert-Butyl-2-oxo-1-oxaspiro-[4.5]dec-3-en-4-yl 4-chloro-benzoate.

Wang Zong-Cheng ZC   Cheng Jing-Li JL   Zhao Jin-Hao JH   Yu Feng F  

Acta crystallographica. Section E, Structure reports online 20110930 Pt 10

The title tetronic acid derivative, C(20)H(23)ClO(4), which is a spiro-diclofen analogue, has two crystallographically independent mol-ecules in the asymmetric unit (Z' = 2). The cyclo-hexane rings in the respective mol-ecules A and B adopt chair conformations [four C atoms are planar with mean deviations of 0.013 (2) and 0.001 (2) Å, and the flap positions deviate by 0.653 (4) and -0.663 (3) Å (mol-ecule A) and 0.642 (4) and -0.643 (5) Å (mol-ecule B) from the plane]. The furan ring makes dihed  ...[more]

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