[N:1]1([C:7]2[S:8][CH:9]=[C:10]([C:12](OCC)=[O:13])[N:11]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.[H-].[Al+3].[Li+].[H-].[H-].[H-]>O1CCCC1>[N:1]1([C:7]2[S:8][CH:9]=[C:10]([CH2:12][OH:13])[N:11]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1The reaction described in Preparation 15 was repeated, but using 3.0 g of ethyl 2-piperidinothiazole-4-carboxylate, 0.5 g of lithium aluminum hydride and 50 ml of tetrahydrofuran, giving the title compound as pale yellow prisms.
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