1-cyclopentylprop-2-yn-1-ol

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: A suspension of 1 g (3.56 mmol) of 2-amino-7-chloro-1-ethyl-N-methyl-4-oxo-1,4-dihydro[1,8]naphthyridine-3-carboxamide in 25 ml of a dimethylformamide/triethylamine mixture (V/V; 2.5/1) is placed in a 10 ml microwave tube. This suspension is sparged with argon for 10 minutes and then 0.931 g (7.5 mmol) of (±)-1-cyclopentylprop-2-yn-1-ol, 0.068 g of CuI (0.36 mmol) and 0.125 g of bis(triphenylphosphine) palladium(II)dichloride (0.18 mmol) are successively added. is placed in a 10 ml microwave tube This suspension is sparged with argon for 10 minutes

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

Procedure: A solution of 0.87 ml of cyclopentanecarboxaldehyde (8.15 mmol; Aldrich) in 10 ml of tetrahydrofuran is added to 18 ml of a commercially available 0.5 M solution of ethynylmagnesium bromide in tetrahydrofuran (10 mmol, Aldrich) cooled beforehand to 0° C. The mixture is then stirred for 2 hours at ambient temperature and a saturated solution of NH4Claq is added. The mixture is extracted with ethyl acetate and the organic phases are then combined, washed with a saturated solution of NaClaq, dried over sodium sulphate, filtered, and concentrated under vacuum. 0.931 g of (±)-1-cyclopentylprop-2-yn-1-ol is obtained in the form of a light brown oil with a yield of 92%. cooled beforehand to 0° C a saturated solution of NH4Claq is added The mixture is extracted with ethyl acetate washed with a saturated solution of NaClaq dried over sodium sulphate filtered concentrated under vacuum