tert-butyl (2S)-2-(hydroxymethyl)piperazine-1-carboxylate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared as a solid according to the method of Example 81 using the product of Example 75 step i) and (S)-2-(hydroxymethyl)-piperazine-1-carboxylic acid, tert-butyl ester.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-{5-[1-(2,4-Bis-trifluoromethyl-benzyl)-1H-indazol-5-ylmethylene]-4-oxo-4,5-dihydro-thiazol-2-yl}-2-(S)-hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester was prepared from 5-[1-(2,4-Bis-trifluoromethyl-benzyl)-1H-indazol-5-ylmethylene]-2-ethylsulfanyl-thiazol-4-one and (2S)—Hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester following General Procedure C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-{5-[1-(2,4-Bis-trifluoromethyl-benzyl)-3-cyano-1H-indazol-5-ylmethylene]-4-oxo-4,5-dihydro-thiazol-2-yl}-2-(S)-hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester was prepared from 1-(2,4-Bis-trifluoromethyl-benzyl)-5-(2-ethylsulfanyl-4-oxo-4H-thiazol-5-ylidenemethyl)-1H-indazole-3-carbonitrile and 2-(S)—Hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester following General Procedure C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-{5-[1-(4-Chloro-2-trifluoromethyl-benzyl)-1H-indazol-5-ylmethylene]-4-oxo-4,5-dihydro-thiazol-2-yl}-2-(S)-hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester was prepared from 5-[1-(4-Chloro-2-trifluoromethyl-benzyl)-1H-indazol-5-ylmethylene]-2-ethylsulfanyl-thiazol-4-one and 2-(S)—Hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester following General Procedure C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-{5-[1-(2,4-Bis-trifluoromethyl-benzyl)-1H-indazol-5-ylmethylene]-4-oxo-4,5-dihydro-thiazol-2-yl}-2-(S)-hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester was prepared from 5-[1-(2,4-Bis-trifluoromethyl-benzyl)-1H-indazol-5-ylmethylene]-2-ethylsulfanyl-thiazol-4-one and 2-(S)—Hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester following general procedure C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-{5-[1-(2,4-Bis-trifluoromethyl-benzyl)-1H-indazol-5-ylmethylene]-4-oxo-4,5-dihydro-thiazol-2-yl}-2-(S)-hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester was prepared from 5-[1-(2,4-Bis-trifluoromethyl-benzyl)-1H-indazol-5-ylmethylene]-2-ethylsulfanyl-thiazol-4-one and (2S)-Hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester following General Procedure C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-{5-[1-(2,4-Bis-trifluoromethyl-benzyl)-3-cyano-1H-indazol-5-ylmethylene]-4-oxo-4,5-dihydro-thiazol-2-yl}-2-(S)-hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester was prepared from 1-(2,4-Bis-trifluoromethyl-benzyl)-5-(2-ethylsulfanyl-4-oxo-4H-thiazol-5-ylidenemethyl)-1H-indazole-3-carbonitrile and 2-(S)-Hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester following General Procedure C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-{5-[1-(4-Chloro-2-trifluoromethyl-benzyl)-1H-indazol-5-ylmethylene]-4-oxo-4,5-dihydro-thiazol-2-yl}-2-(S)-hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester was prepared from 5-[1-(4-Chloro-2-trifluoromethyl-benzyl)-1H-indazol-5-ylmethylene]-2-ethylsulfanyl-thiazol-4-one and 2-(S)-Hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester following General Procedure C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-{5-[1-(2,4-Bis-trifluoromethyl-benzyl)-1H-indazol-5-ylmethylene]-4-oxo-4,5-dihydro-thiazol-2-yl}-2-(S)-hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester was prepared from 5-[1-(2,4-Bis-trifluoromethyl-benzyl)-1H-indazol-5-ylmethylene]-2-ethylsulfanyl-thiazol-4-one and 2-(S)-Hydroxymethyl-piperazine-1-carboxylic acid tert-butyl ester following general procedure C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To solution of (S)-1-Boc-2-hydroxymethyl-piperazine (500 mg) in DCM (15 mL) were added NaHCO3 (369 mg), water (3 mL) and benzyl chloroformate (0.464 mL) at RT. The resulting emulsion was vigorously stirred at RT overnight. The mixture was diluted with water and extracted with DCM. The combined org. layers were dried (MgSO4), filtered off and evaporated in vacuo. The residue was purified by CC (Biotage, SNAP 25 g cartridge, solvent A: Hept; solvent B: EA; gradient in % B: 50 for 6CV, 50 to 70 over 3CV, 70 for 2CV) to afford 714 mg of colourless oil. LC-MS (B): tR=0.82 min; [M+H]+: 350.94. extracted with DCM layers were dried (MgSO4) filtered off evaporated in vacuo The residue was purified by CC (Biotage, SNAP 25 g cartridge, solvent A: Hept; solvent B: EA; gradient in % B: 50 for 6CV, 50 to 70 over 3CV, 70 for 2CV)

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: The title compound was prepared as a solid according to the method of Example 81 using the product of Example 75 step i) and (S)-2-(hydroxymethyl)-piperazine-1-carboxylic acid, tert-butyl ester.