4-(4-Methoxy­phen­yl)-7,7-dimethyl-5-oxo-5,6,7,8-tetra­hydrochromene-2,5-dione

The title compound, C(18)H(20)O(4), was synthesized by the reaction of 4-methoxy­benzaldehyde, 2,2-dimethyl-1,3-dioxane-4,6-dione and 5,5-dimethyl­cyclo­hexane-1,3-dione with triethyl­benzyl­ammonium chloride in water as a green solvent. In the mol­ecule of the title compound, the six-membered pyran...

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Detalles Bibliográficos
Autor principal: Shi, Hao
Formato: Texto
Lenguaje:English
Publicado: International Union of Crystallography 2009
Materias:
Organic Papers
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2972097/
https://www.ncbi.nlm.nih.gov/pubmed/21578924
http://dx.doi.org/10.1107/S160053680904971X
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author Shi, Hao
author_facet Shi, Hao
author_sort Shi, Hao
collection PubMed
description The title compound, C(18)H(20)O(4), was synthesized by the reaction of 4-methoxy­benzaldehyde, 2,2-dimethyl-1,3-dioxane-4,6-dione and 5,5-dimethyl­cyclo­hexane-1,3-dione with triethyl­benzyl­ammonium chloride in water as a green solvent. In the mol­ecule of the title compound, the six-membered pyran­one ring of the hexa­hydro­coumarin system has a screw-boat conformation while that of the dimethyl­cyclo­hexenone system has a distorted envelope conformation. The CMe(2) portion of this ring is disordered over two positions with refined occupancies of 0.721 (7) and 0.279 (7).
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spelling pubmed-29720972010-12-30 4-(4-Methoxy­phen­yl)-7,7-dimethyl-5-oxo-5,6,7,8-tetra­hydrochromene-2,5-dione Shi, Hao Acta Crystallogr Sect E Struct Rep Online Organic Papers The title compound, C(18)H(20)O(4), was synthesized by the reaction of 4-methoxy­benzaldehyde, 2,2-dimethyl-1,3-dioxane-4,6-dione and 5,5-dimethyl­cyclo­hexane-1,3-dione with triethyl­benzyl­ammonium chloride in water as a green solvent. In the mol­ecule of the title compound, the six-membered pyran­one ring of the hexa­hydro­coumarin system has a screw-boat conformation while that of the dimethyl­cyclo­hexenone system has a distorted envelope conformation. The CMe(2) portion of this ring is disordered over two positions with refined occupancies of 0.721 (7) and 0.279 (7). International Union of Crystallography 2009-11-25 /pmc/articles/PMC2972097/ /pubmed/21578924 http://dx.doi.org/10.1107/S160053680904971X Text en © Hao Shi 2009 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
spellingShingle Organic Papers
Shi, Hao
4-(4-Methoxy­phen­yl)-7,7-dimethyl-5-oxo-5,6,7,8-tetra­hydrochromene-2,5-dione
title 4-(4-Methoxy­phen­yl)-7,7-dimethyl-5-oxo-5,6,7,8-tetra­hydrochromene-2,5-dione
title_full 4-(4-Methoxy­phen­yl)-7,7-dimethyl-5-oxo-5,6,7,8-tetra­hydrochromene-2,5-dione
title_fullStr 4-(4-Methoxy­phen­yl)-7,7-dimethyl-5-oxo-5,6,7,8-tetra­hydrochromene-2,5-dione
title_full_unstemmed 4-(4-Methoxy­phen­yl)-7,7-dimethyl-5-oxo-5,6,7,8-tetra­hydrochromene-2,5-dione
title_short 4-(4-Methoxy­phen­yl)-7,7-dimethyl-5-oxo-5,6,7,8-tetra­hydrochromene-2,5-dione
title_sort 4-(4-methoxy­phen­yl)-7,7-dimethyl-5-oxo-5,6,7,8-tetra­hydrochromene-2,5-dione
topic Organic Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2972097/
https://www.ncbi.nlm.nih.gov/pubmed/21578924
http://dx.doi.org/10.1107/S160053680904971X
work_keys_str_mv AT shihao 44methoxyphenyl77dimethyl5oxo5678tetrahydrochromene25dione

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