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Functionalization of methylsulfanylmethylene Meldrum's acid (2,2-dimethyl-1,3-dioxane-4,6-dione) with aryl or thienyl substituents, to give 5-[(p-tert-butylphenyl)(methylsulfanyl)methylene]-2,2-dimethyl-1,3-dioxane-4,6- dione, C18H22O4S, and 5-[(methylsulfanyl)(2-thienyl)methylene]-2,2-dimethyl-1,3-dioxane-4,6-dione, C12H12O4S2, results in a lengthening of the C-S single bond and the adoption of essentially a boat conformation by the Meldrum's acid heterocycle.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks 2, 3, global

fcf

Structure factor file (CIF format)
Contains datablock 2

fcf

Structure factor file (CIF format)
Contains datablock 3

CCDC references: 129524; 129525

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