2-bromo-1-cyclobutylethanone

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

Procedure: The title compound was prepared according to the procedure described in Example 57 from methyl trans-4-chloro-2-(phenylsulfonylamino)cinnamate (step 1 of Example 8, Method A) and bromomethyl cyclobutyl ketone*.

Conditions: temp:135.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2-bromo-1-cyclobutylethanone (27.2 g, 154 mmol) and formamidine acetate (80.0 g, 768 mmol) in ethyleneglycol (150 mL) was heated to 135° C. for 18 h. The mixture was then diluted with H2O and then continuously extracted with Et2O for 18 h. The org. phase was then dried over Na2SO4, filtered and concentrated in vacuo. Purification by distillation in a Kugelrohr oven and flash chromatography (SiO2, DCM to DCM/MeOH 9:1) afforded the title compound (3.5 g). UPLC-MS: MS 123.1 (M+H+); UPLC rt 0.36 min. continuously extracted with Et2O for 18 h phase was then dried over Na2SO4 filtered concentrated in vacuo Purification by distillation in a Kugelrohr oven and flash chromatography (SiO2, DCM to DCM/MeOH 9:1)

Conditions: temp:135.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2-bromo-1-cyclobutylethanone (27.2 g, 154 mmol) and formamidine acetate (80.0 g, 768 mmol) in ethyleneglycol (150 mL) was heated to 135° C. for 18 h. The mixture was then diluted with H2O and then continuously extracted with Et2O for 18 h. The org. phase was then dried over Na2SO4, filtered and concentrated in vacuo. Purification by distillation in a Kugelrohr oven and flash chromatography (SiO2, DCM to DCM/MeOH 9:1) afforded the title compound (3.5 g). UPLC-MS: MS 123.1 (M+H+); UPLC rt 0.36 min. continuously extracted with Et2O for 18 h phase was then dried over Na2SO4 filtered concentrated in vacuo Purification by distillation in a Kugelrohr oven and flash chromatography (SiO2, DCM to DCM/MeOH 9:1)

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

Procedure: The title compound was prepared according to the procedure described in Example 57 from methyl trans-4-chloro-2-(phenylsulfonylamino)cinnamate (step 1 of Example 8, Method A) and bromomethyl cyclobutyl ketone*.

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

Procedure: The title compound was prepared according to the procedure described in Example 57 from methyl trans-4-chloro-2-(phenylsulfonylamino)cinnamate (step 1 of Example 8, Method A) and bromomethyl cyclobutyl ketone*.

Conditions: temp:135.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2-bromo-1-cyclobutylethanone (27.2 g, 154 mmol) and formamidine acetate (80.0 g, 768 mmol) in ethyleneglycol (150 mL) was heated to 135° C. for 18 h. The mixture was then diluted with H2O and then continuously extracted with Et2O for 18 h. The org. phase was then dried over Na2SO4, filtered and concentrated in vacuo. Purification by distillation in a Kugelrohr oven and flash chromatography (SiO2, DCM to DCM/MeOH 9:1) afforded the title compound (3.5 g). UPLC-MS: MS 123.1 (M+H+); UPLC rt 0.36 min. continuously extracted with Et2O for 18 h phase was then dried over Na2SO4 filtered concentrated in vacuo Purification by distillation in a Kugelrohr oven and flash chromatography (SiO2, DCM to DCM/MeOH 9:1)

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

Procedure: The title compound was prepared according to the procedure described in Example 57 from methyl trans-4-chloro-2-(phenylsulfonylamino)cinnamate (step 1 of Example 8, Method A) and bromomethyl cyclobutyl ketone*.

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Thiourea (2.3 g, 30.0 mmol) was dissolved in ethanol (100 ml), added with 2-bromo-1-cyclobutyl-1-ethanone synthesized in the same manner as in Example 1, (E), and then heated to 100° C. The reaction solution was stirred for 1 hour, then returned to room temperature, neutralized with saturated sodium hydrogencarbonate and extracted with chloroform. The collected organic layer was washed with saturated brine, dried over magnesium sulfate and then concentrated under reduced pressure. The title compound was obtained as the residue without purification as a brown oily substance (5.4 g, 100%). synthesized in the same manner as in Example 1, (E), returned to room temperature extracted with chloroform The collected organic layer was washed with saturated brine dried over magnesium sulfate concentrated under reduced pressure

Conditions: temp:135.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2-bromo-1-cyclobutylethanone (27.2 g, 154 mmol) and formamidine acetate (80.0 g, 768 mmol) in ethyleneglycol (150 mL) was heated to 135° C. for 18 h. The mixture was then diluted with H2O and then continuously extracted with Et2O for 18 h. The org. phase was then dried over Na2SO4, filtered and concentrated in vacuo. Purification by distillation in a Kugelrohr oven and flash chromatography (SiO2, DCM to DCM/MeOH 9:1) afforded the title compound (3.5 g). UPLC-MS: MS 123.1 (M+H+); UPLC rt 0.36 min. continuously extracted with Et2O for 18 h phase was then dried over Na2SO4 filtered concentrated in vacuo Purification by distillation in a Kugelrohr oven and flash chromatography (SiO2, DCM to DCM/MeOH 9:1)