Key indicatorsSingle-crystal X-ray study T = 293 K Mean (C-C) = 0.002 Å R factor = 0.040 wR factor = 0.113 Data-to-parameter ratio = 14.4For details of how these key indicators were automatically derived from the article, see

The preparation of two reduced pyrimidine derivatives, ethyl 3-acetyl-4-(4-methoxyphenyl)-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate and ethyl 4-(3,4-dimethoxyphenyl)-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate, is described, along with details of their crystal structure analysis.

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Experimental Crystal data C 17 H 20 N 2 O 5 M r = 332.35 Monoclinic, P2 1 =c a = 8.8387 (8) Å b = 20.2043 (18) Å c = 10.0232 (9) Å = 107.839 (2) V = 1703.9 (3) Å 3 Z = 4 Mo K radiation = 0.10 mm À1 T = 293 (2) K 0.3 Â 0.2 Â 0.1 mm Data collectionBruker SMART CCD area-detector diffractometer Absorption correction: none 17507 measured reflections 3343 independent reflections 2369 reflections with I > 2(I) R int = 0.045

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The preparation of 2-amino-5,5-dimethyl-7-oxo-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxamide via the intermediate 2-amino-5,5-dimethyl-7-oxo-4,5,6,7-tetrahydro-1-benzothiophene-3-carbonitrile is described, along with details ofthe crystal structure analysis of both compounds.